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Home > IL Providers > Mohs Surgeons

Dr. James G. Lahti, MD, MPH

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Specializes in: MOHS-Micrographic Surgery

Northwestern University, Feinberg School of Medicine (1994)

Professional interests include: skin issues

400 Skokie Boulevard Suite 475
Northbrook, IL 60062

(847) 272-0022

Dr. James G. Lahti, MD, MPH is a mohs skin cancer surgeon in Northbrook, IL specializing in mohs-micrographic surgery. He graduated from Northwestern University, Feinberg School of Medicine in 1994 and has 32 years of experience. Dr. James G. Lahti, MD, MPH is affiliated with Endeavor Health, Northwestern Medicine and Northwestern University Feinberg School of Medicine.

Office Locations

Endeavor Health

400 Skokie Boulevard Suite 475
Northbrook, IL 60062

(847) 272-4433

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676 N Saint Clair Suite 1600
Chicago, IL 60611

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Some issues Dr. James G. Lahti, MD, MPH can help you with:

Skin Issues

The skin is the largest organ in the body, protecting and covering the more sensitive inner organs. Considering its size and that it is constantly exposed to the elements, the skin is usually relatively problem-free. However that doesn't mean that issues don't come up from time to time that might need the help of a professional. The most common skin issues that people seek medical help with are cosmetic issues, acne, eczema, dermatitis, psoriasis, and skin growths.

Professional cosmetic skin treatments exist to treat wrinkles, scars, dark spots, remove excess hair, tone and tighten skin, and otherwise improve the appearance of the skin. They may use lasers, light therapy, chemical peels, microdermabrasion, or many other forms of skin treatment.

Acne occurs when hair follicles become clogged with oil and dead skin cells, most commonly on the face or back. The clogged follicles can then become infected and inflamed. Treatments include antibiotics, anti-inflammatories, and retinoid creams.

Eczema is dry, sensitive skin that causes an itchy red rash, often in response to specific triggers. It is common in childhood but can sometimes last into adulthood. The main treatment involves keeping skin well moisturized.

Dermatitis is the medical name for any kind of skin inflammation or rash. Rashes can happen because of an allergy or contact with an irritating substance. They may be red, itchy, or even painful. They are often treated with antihistamines or moisturizing creams containing cortisone.

Psoriasis is patches of thick, red skin that is covered in silvery scales. It is often itchy and sore. Psoriasis is thought to be caused by an immune disorder, and it runs in families. Psoriasis is not contagious. There is no cure, but there are medicated creams available to treat the symptoms.

Skin growths, including warts and moles, are usually not serious. However, some skin growths should be examined by a doctor to make sure they don't cause problems in the future. Warts are harmless, rough, bumpy growths caused by a viral infection. They occur most often on the hands and feet. Because they are caused by a virus, they are contagious. Moles are brown or black spots that are sometimes raised slightly from the surface of the skin. They happen when clumps of pigment cells form in a cluster instead of spread out. Moles are harmless except that they are more vulnerable to cancer than other parts of the skin. Skin cancer is the most common form of cancer in the United States, and its risk increases with sun exposure and fair skin tone.

Skin issues can be embarrassing or irritating, but most are minor and can be treated without serious problems. Some, however, can be a sign of a more significant issue, so it is important to see a doctor for anything out of the ordinary.

Noteworthy Medicare Patient Procedures Performed by Dr. James G. Lahti, MD, MPH in 2023

Click on any procedure below to see further details on volume and pricing among Medicare patients.

Top 5%

By Volume:

Mohs surgery

reconstructive plastic surgery

removal of skin lesion

tissue transfer

wound repair

By Affordability:

flap reconstruction

pedicled flap reconstruction

pedicled skin flap reconstruction

skin flap reconstruction

In 2023, among providers in related specialties within Illinois, Dr. James G. Lahti, MD, MPH performed more Mohs surgery, reconstructive plastic surgery, removal of skin lesion (growth or mark), tissue transfer, and wound repair (e.g. stitches) procedures for Medicare patients than 95% of them and he also had a list price for flap reconstruction, pedicled (attached) flap reconstruction, pedicled skin flap reconstruction, and skin flap reconstruction that was lower than the list prices billed to Medicare by 95% of them. Actual amounts paid by patients can vary widely depending on a number of factors, including insurance coverage. A lower list price, however, might mean lower fees when paying without insurance.

Top 25%

By Volume:

ear biopsy

intermediate wound repair

By Affordability:

adjacent tissue transfer

ear biopsy

ear procedures

skin grafting

In 2012, among providers in related specialties within Illinois, Dr. James G. Lahti, MD, MPH performed more ear biopsy, and intermediate wound repair procedures for Medicare patients than 75% of them and he also had a list price for adjacent tissue transfer, ear biopsy, ear procedures, and skin grafting that was lower than the list prices billed to Medicare by 75% of them. Actual amounts paid by patients can vary widely depending on a number of factors, including insurance coverage. A lower list price, however, might mean lower fees when paying without insurance.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. James G. Lahti, MD, MPH treated as a mohs skin cancer surgeon in Northbrook, IL during 2012 were skin procedures, removal of lesion (e.g. growth), skin surgery and cancer surgery.

Volume of procedures performed by Dr. James G. Lahti, MD, MPH for Medicare patients.

cancer surgery	1880
consultation	149
diagnostic procedures	301
doctor visit	993
ear procedures	28
lab tests	331
minor procedures	32
phototherapy (light therapy)	24
plastic surgery procedures	157
reconstructive surgery	157
removal of lesion (e.g. growth)	2093
skin procedures	2117
skin surgery	1880
tissue transfer	157
wound repair (e.g. stitches)	189

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. James G. Lahti, MD, MPH treated as a mohs skin cancer surgeon in Northbrook, IL during 2013 were skin procedures, removal of lesion (e.g. growth), skin surgery and cancer surgery.

Volume of procedures performed by Dr. James G. Lahti, MD, MPH for Medicare patients.

cancer surgery	1841
consultation	96
diagnostic procedures	295
doctor visit	1047
ear procedures	13
lab tests	370
minor procedures	57
phototherapy (light therapy)	43
plastic surgery procedures	124
reconstructive surgery	124
removal of lesion (e.g. growth)	2073
skin procedures	2116
skin surgery	1841
tissue transfer	124
wound repair (e.g. stitches)	181

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. James G. Lahti, MD, MPH.

**Gender**
Male	616
Female	541

**Ethnicity**
Non-Hispanic White	1139
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	412
From 75 to 84	475
85 and over	259
Less than 65	11

Conditions of Medicare patients treated by Dr. James G. Lahti, MD, MPH in 2013

Hypertension	60
High Cholesterol	55
Stroke	3
Ischemic Heart Disease	32
Depression	11
Chronic Kidney Disease	17
Asthma	5
Osteoperosis	9
Atrial Fibrilation	14
Heart Failure	14
Chronic Obstructive Pulmonary Disease	8
Diabetes	19
Dementia	7
Cancer	15

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. James G. Lahti, MD, MPH treated as a mohs skin cancer surgeon in Northbrook, IL during 2014 were skin procedures, removal of lesion (e.g. growth), skin surgery and cancer surgery.

Volume of procedures performed by Dr. James G. Lahti, MD, MPH for Medicare patients.

cancer surgery	1987
consultation	59
diagnostic procedures	302
doctor visit	738
ear procedures	19
lab tests	70
minor procedures	67
phototherapy (light therapy)	54
plastic surgery procedures	124
reconstructive surgery	124
removal of lesion (e.g. growth)	2210
skin procedures	2264
skin surgery	1987
tissue transfer	124
wound repair (e.g. stitches)	191

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. James G. Lahti, MD, MPH.

**Gender**
Male	637
Female	586

**Ethnicity**
Non-Hispanic White	1206
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	424
From 75 to 84	476
85 and over	308
Less than 65	15

Conditions of Medicare patients treated by Dr. James G. Lahti, MD, MPH in 2014

Hypertension	60
High Cholesterol	52
Stroke	5
Ischemic Heart Disease	33
Depression	12
Chronic Kidney Disease	21
Asthma	5
Osteoperosis	8
Atrial Fibrilation	16
Heart Failure	14
Chronic Obstructive Pulmonary Disease	9
Diabetes	22
Dementia	8
Cancer	14

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. James G. Lahti, MD, MPH treated as a mohs skin cancer surgeon in Northbrook, IL during 2015 were skin procedures, removal of lesion (e.g. growth), skin surgery and cancer surgery.

Volume of procedures performed by Dr. James G. Lahti, MD, MPH for Medicare patients.

cancer surgery	1856
consultation	67
diagnostic procedures	219
doctor visit	727
lab tests	38
minor procedures	64
phototherapy (light therapy)	37
plastic surgery procedures	124
reconstructive surgery	124
removal of lesion (e.g. growth)	2091
skin procedures	2128
skin surgery	1856
tissue transfer	124
wound repair (e.g. stitches)	188

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. James G. Lahti, MD, MPH.

**Gender**
Male	1346
Female	1078

**Ethnicity**
Non-Hispanic White	2360
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	740
From 75 to 84	992
85 and over	670
Less than 65	22

Conditions of Medicare patients treated by Dr. James G. Lahti, MD, MPH in 2015

Hypertension	60
High Cholesterol	51
Stroke	5
Ischemic Heart Disease	33
Depression	12
Chronic Kidney Disease	20
Asthma	7
Osteoperosis	10
Atrial Fibrilation	16
Heart Failure	14
Chronic Obstructive Pulmonary Disease	10
Diabetes	21
Dementia	8
Cancer	12

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. James G. Lahti, MD, MPH treated as a mohs skin cancer surgeon in Northbrook, IL during 2016 were skin procedures, removal of lesion (e.g. growth), skin surgery and cancer surgery.

Volume of procedures performed by Dr. James G. Lahti, MD, MPH for Medicare patients.

cancer surgery	1774
consultation	77
diagnostic procedures	230
doctor visit	900
ear procedures	20
minor procedures	44
phototherapy (light therapy)	23
plastic surgery procedures	114
reconstructive surgery	114
removal of lesion (e.g. growth)	2002
skin procedures	2025
skin surgery	1774
tissue transfer	114
wound repair (e.g. stitches)	158

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. James G. Lahti, MD, MPH.

**Gender**
Male	704
Female	552

**Ethnicity**
Non-Hispanic White	1226
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	396
From 75 to 84	511
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. James G. Lahti, MD, MPH in 2016

Hypertension	59
High Cholesterol	50
Stroke	4
Ischemic Heart Disease	32
Depression	11
Chronic Kidney Disease	20
Asthma	10
Osteoperosis	8
Atrial Fibrilation	16
Heart Failure	14
Chronic Obstructive Pulmonary Disease	10
Diabetes	17
Dementia	8
Cancer	13

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. James G. Lahti, MD, MPH treated as a mohs skin cancer surgeon in Northbrook, IL during 2017 were removal of lesion (e.g. growth), skin procedures, skin surgery and cancer surgery.

Volume of procedures performed by Dr. James G. Lahti, MD, MPH for Medicare patients.

cancer surgery	1928
consultation	80
diagnostic procedures	206
doctor visit	700
ear procedures	16
minor procedures	55
plastic surgery procedures	149
reconstructive surgery	149
removal of lesion (e.g. growth)	2104
skin procedures	2104
skin surgery	1928
tissue transfer	149
wound repair (e.g. stitches)	204

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. James G. Lahti, MD, MPH.

**Gender**
Male	686
Female	600

**Ethnicity**
Non-Hispanic White	1246
Black	0
Hispanic	0
Asian	0
Other	28
Native American	0

**Age**
From 65 to 74	434
From 75 to 84	499
85 and over	339
Less than 65	14

Conditions of Medicare patients treated by Dr. James G. Lahti, MD, MPH in 2017

Hypertension	59
High Cholesterol	41
Stroke	3
Ischemic Heart Disease	32
Depression	12
Chronic Kidney Disease	21
Asthma	5
Osteoperosis	8
Atrial Fibrilation	16
Heart Failure	15
Chronic Obstructive Pulmonary Disease	10
Diabetes	19
Dementia	8
Cancer	15

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. James G. Lahti, MD, MPH treated as a mohs skin cancer surgeon in Northbrook, IL during 2018 were removal of lesion (e.g. growth), skin procedures, skin surgery and cancer surgery.

Volume of procedures performed by Dr. James G. Lahti, MD, MPH for Medicare patients.

cancer surgery	1944
consultation	82
diagnostic procedures	128
doctor visit	643
minor procedures	49
plastic surgery procedures	233
reconstructive surgery	233
removal of lesion (e.g. growth)	2054
skin procedures	2054
skin surgery	1944
tissue transfer	233
wound repair (e.g. stitches)	282

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. James G. Lahti, MD, MPH.

**Gender**
Male	677
Female	572

**Ethnicity**
Non-Hispanic White	1195
Black	0
Hispanic	0
Asian	0
Other	40
Native American	0

**Age**
From 65 to 74	416
From 75 to 84	505
85 and over	314
Less than 65	14

Conditions of Medicare patients treated by Dr. James G. Lahti, MD, MPH in 2018

Hypertension	57
High Cholesterol	54
Stroke	4
Ischemic Heart Disease	29
Depression	13
Chronic Kidney Disease	23
Asthma	4
Osteoperosis	10
Atrial Fibrilation	15
Heart Failure	14
Chronic Obstructive Pulmonary Disease	8
Diabetes	19
Dementia	9
Cancer	14

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. James G. Lahti, MD, MPH treated as a mohs skin cancer surgeon in Northbrook, IL during 2019 were removal of lesion (e.g. growth), skin procedures, skin surgery and cancer surgery.

Volume of procedures performed by Dr. James G. Lahti, MD, MPH for Medicare patients.

cancer surgery	2002
consultation	83
diagnostic procedures	16
doctor visit	622
ear procedures	16
minor procedures	43
plastic surgery procedures	272
reconstructive surgery	272
removal of lesion (e.g. growth)	2089
skin procedures	2089
skin surgery	2002
tissue transfer	272
wound repair (e.g. stitches)	315

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. James G. Lahti, MD, MPH.

**Gender**
Male	645
Female	550

**Ethnicity**
Non-Hispanic White	1155
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	406
From 75 to 84	477
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. James G. Lahti, MD, MPH in 2019

Hypertension	58
High Cholesterol	56
Stroke	4
Ischemic Heart Disease	31
Depression	12
Chronic Kidney Disease	24
Asthma	5
Osteoperosis	10
Atrial Fibrilation	16
Heart Failure	16
Chronic Obstructive Pulmonary Disease	9
Diabetes	20
Dementia	8
Cancer	15

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. James G. Lahti, MD, MPH treated as a mohs skin cancer surgeon in Northbrook, IL during 2020 were removal of lesion (e.g. growth), skin procedures, skin surgery and cancer surgery.

Volume of procedures performed by Dr. James G. Lahti, MD, MPH for Medicare patients.

cancer surgery	1782
consultation	76
diagnostic procedures	12
doctor visit	718
ear procedures	12
lab tests	32
minor procedures	16
plastic surgery procedures	221
reconstructive surgery	221
removal of lesion (e.g. growth)	1865
skin procedures	1865
skin surgery	1782
tissue transfer	221
wound repair (e.g. stitches)	237

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. James G. Lahti, MD, MPH.

**Gender**
Male	586
Female	502

**Ethnicity**
Non-Hispanic White	1037
Black	0
Hispanic	0
Asian	0
Other	40
Native American	0

**Age**
From 65 to 74	375
From 75 to 84	448
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. James G. Lahti, MD, MPH in 2020

Hypertension	54
High Cholesterol	53
Stroke	4
Ischemic Heart Disease	31
Depression	15
Chronic Kidney Disease	27
Asthma	3
Osteoperosis	8
Atrial Fibrilation	13
Heart Failure	16
Chronic Obstructive Pulmonary Disease	6
Diabetes	20
Dementia	7
Cancer	15

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. James G. Lahti, MD, MPH treated as a mohs skin cancer surgeon in Northbrook, IL during 2021 were removal of lesion (e.g. growth), skin procedures, skin surgery and cancer surgery.

Volume of procedures performed by Dr. James G. Lahti, MD, MPH for Medicare patients.

cancer surgery	1789
consultation	84
diagnostic procedures	12
doctor visit	986
ear procedures	12
minor procedures	37
plastic surgery procedures	236
reconstructive surgery	236
removal of lesion (e.g. growth)	1917
skin procedures	1917
skin surgery	1789
tissue transfer	236
wound repair (e.g. stitches)	273

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. James G. Lahti, MD, MPH.

**Gender**
Male	677
Female	560

**Ethnicity**
Non-Hispanic White	1174
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	440
From 75 to 84	493
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. James G. Lahti, MD, MPH in 2021

Hypertension	55
High Cholesterol	53
Stroke	4
Ischemic Heart Disease	31
Depression	14
Chronic Kidney Disease	25
Asthma	4
Osteoperosis	10
Atrial Fibrilation	14
Heart Failure	15
Chronic Obstructive Pulmonary Disease	7
Diabetes	22
Dementia	8
Cancer	14

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. James G. Lahti, MD, MPH treated as a mohs skin cancer surgeon in Northbrook, IL during 2022 were removal of lesion (e.g. growth), skin procedures, skin surgery and cancer surgery.

Volume of procedures performed by Dr. James G. Lahti, MD, MPH for Medicare patients.

cancer surgery	1892
consultation	76
diagnostic procedures	21
doctor visit	1401
ear procedures	21
injections	17
lab tests	19
minor procedures	63
plastic surgery procedures	247
reconstructive surgery	247
removal of lesion (e.g. growth)	2063
skin procedures	2063
skin surgery	1892
tissue transfer	247
wound repair (e.g. stitches)	310

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. James G. Lahti, MD, MPH.

**Gender**
Male	709
Female	624

**Ethnicity**
Non-Hispanic White	1258
Black	0
Hispanic	0
Asian	0
Other	53
Native American	0

**Age**
From 65 to 74	443
From 75 to 84	551
85 and over	327
Less than 65	12

Conditions of Medicare patients treated by Dr. James G. Lahti, MD, MPH in 2022

Hypertension	68
High Cholesterol	75
Stroke	8
Ischemic Heart Disease	26
Depression	12
Chronic Kidney Disease	22
Asthma	7
Osteoperosis	16
Atrial Fibrilation	20
Heart Failure	13
Chronic Obstructive Pulmonary Disease	10
Diabetes	21
Dementia	6
Cancer	20

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. James G. Lahti, MD, MPH for Medicare patients.

The highest averages for the top procedures that Dr. James G. Lahti, MD, MPH treated as a mohs skin cancer surgeon in Northbrook, IL were skin procedures, removal of lesion (e.g. growth), skin surgery and cancer surgery.

cancer surgery	1879
consultation	84
diagnostic procedures	158
doctor visit	861
ear procedures	17
injections	17
lab tests	143
minor procedures	47
phototherapy (light therapy)	36
plastic surgery procedures	181
reconstructive surgery	181
removal of lesion (e.g. growth)	2051
skin procedures	2067
skin surgery	1879
tissue transfer	181
wound repair (e.g. stitches)	229

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. James G. Lahti, MD, MPH.

**Gender**
Male	662
Female	560

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	1181
Native American / Alaskan Native	0
Hispanic	0
Other	14

**Age**
75 to 84	493
85 and over	201
Less than 65	8
65 to 74	407

Average of Total of Conditions of Medicare patients treated by Dr. James G. Lahti, MD, MPH From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. James G. Lahti, MD, MPH treated were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	53
High Cholesterol	49
Stroke	4
Ischemic Heart Disease	28
Depression	11
Chronic Kidney Disease	20
Asthma	5
Osteoporosis	8
Heart Failure	13
Chronic Obstructive Pulmonary Disease	7
Diabetes	18
Atrial Fibrillation	14
Dementia	7
Cancer	13

Education & Training

Dr. James G. Lahti, MD, MPH graduated from Northwestern University, Feinberg School of Medicine in 1994. He completed residency at Beth Israel Deaconess Medical Center. He is certified by the Dermatology, American Board of Dermatology and has a state license in Illinois.

Medical School: Northwestern University, Feinberg School of Medicine (1994)

Residency: Beth Israel Deaconess Medical Center (1997)

Board Certification: Dermatology, American Board of Dermatology

Licensed In: Illinois

Affiliations & Hospitals

Dr. James G. Lahti, MD, MPH is associated with these hospitals and organizations:

Endeavor Health

Northwestern Medicine

Northwestern University Feinberg School of Medicine

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General Payments

These charts describe general payments received by Dr. James G. Lahti, MD, MPH. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
Genentech USA, Inc.	$445 Erivedge $445
Janssen Biotech, Inc.	$228 STELARA $144	Tremfya $60	SIMPONI $25
AbbVie, Inc.	$190 Humira $190
Galderma Laboratories, L.P.	$107 EPIDUO $51	ORACEA $13	MIRVASO $12	MIRVASO GEL $11	$19
Novartis Pharmaceuticals Corporation	$97 COSENTYX $66	NON BRAND $11	$19
Other	$621 LOCOID BRAND $67	DORYX $40	ACZONE $40	Fluoroplex $39	Cimzia $35	Other $399

**Types of Payments**
Food and Beverage	$1,610
Education	$78

Biography

Dr. James Lahti is a MOHS-micrographic surgery specialist in Northbrook, IL and Chicago, IL. Areas of particular interest for Dr. Lahti include skin issues. His hospital/clinic affiliations include Northwestern University Feinberg School of Medicine, Northwestern Memorial Hospital, and Endeavor Health. Dr. Lahti attended Northwestern University, Feinberg School of Medicine and subsequently trained at Beth Israel Deaconess Medical Center and a hospital affiliated with the University of Maryland for residency.