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Home > FL Providers > Retina Specialists

Dr. John H. Niffenegger, MD

Claimed Profile

(2 Ratings)

Specializes in: Vitreoretinal Diseases (Retina and Vitreous)

3920 Bee Ridge Road Building D
Sarasota, FL 34233

(941) 924-0303

Dr. John H. Niffenegger, MD is a retina specialist in Sarasota, FL specializing in vitreoretinal diseases (retina and vitreous).

Office Locations

3920 Bee Ridge Road Building D
Sarasota, FL 34233

(941) 924-0303

open_in_new

In The News

“Dr. John Niffenegger of Sarasota has been nominated by the Florida Society of Ophthalmology as 2008 vice president.”—"Business people", Sarasota Herald-Tribune, August 2008

Noteworthy Medicare Patient Procedures Performed by Dr. John H. Niffenegger, MD in 2024

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

Top 5%

By Volume:

eye procedures

intravitreal drug injection

SCODI of the posterior segment

In 2024, Dr. John H. Niffenegger, MD performed more eye procedures, intravitreal drug injection, and SCODI of the posterior segment (SCODI-P) procedures for Medicare patients than 95% of providers in related specialties within Florida.

Top 25%

By Affordability:

eye procedures

In 2012, Dr. John H. Niffenegger, MD had a list price for eye procedures that was lower than the list prices billed to Medicare by 75% of providers in related specialties within Florida. 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. John H. Niffenegger, MD treated as a retina specialist in Sarasota, FL during 2012 were eye procedures, injections, diagnostic imaging and ultrasound (sonogram).

Volume of procedures performed by Dr. John H. Niffenegger, MD for Medicare patients.

diagnostic imaging	105
doctor visit	145
eye procedures	13041
injections	3206
photocoagulation	25
prophylaxis (preventive treatment)	25
ultrasound (sonogram)	105

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. John H. Niffenegger, MD treated as a retina specialist in Sarasota, FL during 2013 were eye procedures, injections, diagnostic imaging and ultrasound (sonogram).

Volume of procedures performed by Dr. John H. Niffenegger, MD for Medicare patients.

diagnostic imaging	96
doctor visit	78
eye procedures	13041
injections	3247
photocoagulation	23
prophylaxis (preventive treatment)	23
ultrasound (sonogram)	96

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. John H. Niffenegger, MD.

**Gender**
Male	624
Female	776

**Ethnicity**
Non-Hispanic White	1329
Black	30
Hispanic	15
Asian	15
Other	11
Native American	0

**Age**
From 65 to 74	432
From 75 to 84	547
85 and over	396
Less than 65	25

Conditions of Medicare patients treated by Dr. John H. Niffenegger, MD in 2013

Hypertension	70
High Cholesterol	67
Stroke	5
Ischemic Heart Disease	45
Depression	16
Chronic Kidney Disease	24
Asthma	6
Osteoperosis	10
Atrial Fibrilation	16
Heart Failure	19
Chronic Obstructive Pulmonary Disease	14
Diabetes	31
Dementia	11
Cancer	12

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. John H. Niffenegger, MD treated as a retina specialist in Sarasota, FL during 2014 were eye procedures, injections, diagnostic imaging and ultrasound (sonogram).

Volume of procedures performed by Dr. John H. Niffenegger, MD for Medicare patients.

diagnostic imaging	105
doctor visit	113
eye procedures	11888
injections	3230
photocoagulation	19
prophylaxis (preventive treatment)	19
ultrasound (sonogram)	105

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. John H. Niffenegger, MD.

**Gender**
Male	640
Female	766

**Ethnicity**
Non-Hispanic White	1340
Black	21
Hispanic	0
Asian	0
Other	20
Native American	0

**Age**
From 65 to 74	429
From 75 to 84	514
85 and over	431
Less than 65	32

Conditions of Medicare patients treated by Dr. John H. Niffenegger, MD in 2014

Hypertension	73
High Cholesterol	67
Stroke	6
Ischemic Heart Disease	44
Depression	16
Chronic Kidney Disease	26
Asthma	5
Osteoperosis	10
Atrial Fibrilation	16
Heart Failure	17
Chronic Obstructive Pulmonary Disease	15
Diabetes	30
Dementia	11
Cancer	13

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. John H. Niffenegger, MD treated as a retina specialist in Sarasota, FL during 2015 were eye procedures, injections, diagnostic imaging and ultrasound (sonogram).

Volume of procedures performed by Dr. John H. Niffenegger, MD for Medicare patients.

diagnostic imaging	123
doctor visit	1308
eye procedures	10782
injections	2745
photocoagulation	30
prophylaxis (preventive treatment)	30
ultrasound (sonogram)	123

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. John H. Niffenegger, MD.

**Gender**
Male	1418
Female	1654

**Ethnicity**
Non-Hispanic White	2922
Black	40
Hispanic	34
Asian	0
Other	48
Native American	0

**Age**
From 65 to 74	942
From 75 to 84	1114
85 and over	960
Less than 65	56

Conditions of Medicare patients treated by Dr. John H. Niffenegger, MD in 2015

Hypertension	74
High Cholesterol	68
Stroke	6
Ischemic Heart Disease	43
Depression	16
Chronic Kidney Disease	25
Asthma	10
Osteoperosis	12
Atrial Fibrilation	16
Heart Failure	18
Chronic Obstructive Pulmonary Disease	16
Diabetes	29
Dementia	12
Cancer	15

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. John H. Niffenegger, MD treated as a retina specialist in Sarasota, FL during 2016 were eye procedures, injections, diagnostic imaging and ultrasound (sonogram).

Volume of procedures performed by Dr. John H. Niffenegger, MD for Medicare patients.

diagnostic imaging	123
doctor visit	1427
eye procedures	11304
injections	2880
photocoagulation	31
prophylaxis (preventive treatment)	31
ultrasound (sonogram)	123

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. John H. Niffenegger, MD.

**Gender**
Male	715
Female	859

**Ethnicity**
Non-Hispanic White	1494
Black	22
Hispanic	22
Asian	0
Other	23
Native American	0

**Age**
From 65 to 74	499
From 75 to 84	586
85 and over	460
Less than 65	29

Conditions of Medicare patients treated by Dr. John H. Niffenegger, MD in 2016

Hypertension	73
High Cholesterol	69
Stroke	6
Ischemic Heart Disease	42
Depression	17
Chronic Kidney Disease	30
Asthma	19
Osteoperosis	11
Atrial Fibrilation	16
Heart Failure	19
Chronic Obstructive Pulmonary Disease	17
Diabetes	29
Dementia	11
Cancer	15

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. John H. Niffenegger, MD treated as a retina specialist in Sarasota, FL during 2017 were eye procedures, injections, diagnostic imaging and ultrasound (sonogram).

Volume of procedures performed by Dr. John H. Niffenegger, MD for Medicare patients.

diagnostic imaging	127
doctor visit	611
eye procedures	11393
injections	2508
photocoagulation	21
prophylaxis (preventive treatment)	21
ultrasound (sonogram)	127

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. John H. Niffenegger, MD.

**Gender**
Male	705
Female	875

**Ethnicity**
Non-Hispanic White	1506
Black	18
Hispanic	22
Asian	0
Other	22
Native American	0

**Age**
From 65 to 74	484
From 75 to 84	585
85 and over	471
Less than 65	40

Conditions of Medicare patients treated by Dr. John H. Niffenegger, MD in 2017

Hypertension	72
High Cholesterol	60
Stroke	7
Ischemic Heart Disease	43
Depression	18
Chronic Kidney Disease	33
Asthma	7
Osteoperosis	11
Atrial Fibrilation	17
Heart Failure	18
Chronic Obstructive Pulmonary Disease	17
Diabetes	29
Dementia	14
Cancer	14

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. John H. Niffenegger, MD treated as a retina specialist in Sarasota, FL during 2018 were eye procedures, injections, diagnostic imaging and ultrasound (sonogram).

Volume of procedures performed by Dr. John H. Niffenegger, MD for Medicare patients.

diagnostic imaging	130
doctor visit	512
eye procedures	11650
injections	2612
photocoagulation	19
prophylaxis (preventive treatment)	19
ultrasound (sonogram)	130

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. John H. Niffenegger, MD.

**Gender**
Male	745
Female	878

**Ethnicity**
Non-Hispanic White	1531
Black	21
Hispanic	26
Asian	13
Other	32
Native American	0

**Age**
From 65 to 74	466
From 75 to 84	641
85 and over	480
Less than 65	36

Conditions of Medicare patients treated by Dr. John H. Niffenegger, MD in 2018

Hypertension	72
High Cholesterol	71
Stroke	6
Ischemic Heart Disease	45
Depression	19
Chronic Kidney Disease	32
Asthma	6
Osteoperosis	12
Atrial Fibrilation	17
Heart Failure	20
Chronic Obstructive Pulmonary Disease	16
Diabetes	27
Dementia	15
Cancer	15

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. John H. Niffenegger, MD treated as a retina specialist in Sarasota, FL during 2019 were eye procedures, injections, diagnostic imaging and ultrasound (sonogram).

Volume of procedures performed by Dr. John H. Niffenegger, MD for Medicare patients.

diagnostic imaging	149
doctor visit	329
eye procedures	12316
injections	2790
photocoagulation	19
prophylaxis (preventive treatment)	19
ultrasound (sonogram)	149

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. John H. Niffenegger, MD.

**Gender**
Male	771
Female	948

**Ethnicity**
Non-Hispanic White	1626
Black	0
Hispanic	27
Asian	0
Other	39
Native American	0

**Age**
From 65 to 74	538
From 75 to 84	688
85 and over	461
Less than 65	32

Conditions of Medicare patients treated by Dr. John H. Niffenegger, MD in 2019

Hypertension	74
High Cholesterol	75
Stroke	6
Ischemic Heart Disease	45
Depression	20
Chronic Kidney Disease	32
Asthma	6
Osteoperosis	12
Atrial Fibrilation	16
Heart Failure	19
Chronic Obstructive Pulmonary Disease	15
Diabetes	28
Dementia	12
Cancer	15

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. John H. Niffenegger, MD treated as a retina specialist in Sarasota, FL during 2020 were eye procedures, injections, diagnostic imaging and ultrasound (sonogram).

Volume of procedures performed by Dr. John H. Niffenegger, MD for Medicare patients.

diagnostic imaging	94
eye procedures	11381
injections	2837
photocoagulation	22
prophylaxis (preventive treatment)	22
ultrasound (sonogram)	94

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. John H. Niffenegger, MD.

**Gender**
Male	762
Female	905

**Ethnicity**
Non-Hispanic White	1583
Black	14
Hispanic	20
Asian	0
Other	38
Native American	0

**Age**
From 65 to 74	511
From 75 to 84	691
85 and over	438
Less than 65	27

Conditions of Medicare patients treated by Dr. John H. Niffenegger, MD in 2020

Hypertension	72
High Cholesterol	72
Stroke	6
Ischemic Heart Disease	44
Depression	18
Chronic Kidney Disease	34
Asthma	6
Osteoperosis	12
Atrial Fibrilation	17
Heart Failure	18
Chronic Obstructive Pulmonary Disease	14
Diabetes	28
Dementia	11
Cancer	14

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. John H. Niffenegger, MD treated as a retina specialist in Sarasota, FL during 2021 were eye procedures, injections, diagnostic imaging and ultrasound (sonogram).

Volume of procedures performed by Dr. John H. Niffenegger, MD for Medicare patients.

diagnostic imaging	68
doctor visit	2193
eye procedures	8542
injections	2881
photocoagulation	14
prophylaxis (preventive treatment)	14
ultrasound (sonogram)	68

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. John H. Niffenegger, MD.

**Gender**
Male	719
Female	939

**Ethnicity**
Non-Hispanic White	1558
Black	0
Hispanic	28
Asian	13
Other	46
Native American	0

**Age**
From 65 to 74	542
From 75 to 84	664
85 and over	430
Less than 65	22

Conditions of Medicare patients treated by Dr. John H. Niffenegger, MD in 2021

Hypertension	73
High Cholesterol	74
Stroke	6
Ischemic Heart Disease	44
Depression	20
Chronic Kidney Disease	36
Asthma	6
Osteoperosis	13
Atrial Fibrilation	16
Heart Failure	18
Chronic Obstructive Pulmonary Disease	14
Diabetes	28
Dementia	10
Cancer	14

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. John H. Niffenegger, MD treated as a retina specialist in Sarasota, FL during 2022 were eye procedures, injections, diagnostic imaging and ultrasound (sonogram).

Volume of procedures performed by Dr. John H. Niffenegger, MD for Medicare patients.

diagnostic imaging	46
doctor visit	140
eye procedures	9812
injections	2879
ultrasound (sonogram)	46

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. John H. Niffenegger, MD.

**Gender**
Male	702
Female	978

**Ethnicity**
Non-Hispanic White	1576
Black	0
Hispanic	31
Asian	14
Other	48
Native American	0

**Age**
From 65 to 74	519
From 75 to 84	689
85 and over	444
Less than 65	28

Conditions of Medicare patients treated by Dr. John H. Niffenegger, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	9
Ischemic Heart Disease	35
Depression	20
Chronic Kidney Disease	25
Asthma	9
Osteoperosis	20
Atrial Fibrilation	23
Heart Failure	17
Chronic Obstructive Pulmonary Disease	18
Diabetes	27
Dementia	6
Cancer	18

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. John H. Niffenegger, MD treated as a retina specialist in Sarasota, FL during 2023 were eye procedures, injections, diagnostic imaging and ultrasound (sonogram).

Volume of procedures performed by Dr. John H. Niffenegger, MD for Medicare patients.

diagnostic imaging	38
doctor visit	175
eye procedures	8715
injections	2452
ultrasound (sonogram)	38

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. John H. Niffenegger, MD.

**Gender**
Male	712
Female	887

**Ethnicity**
Non-Hispanic White	1501
Black	0
Hispanic	20
Asian	15
Other	48
Native American	0

**Age**
From 65 to 74	472
From 75 to 84	695
85 and over	412
Less than 65	20

Conditions of Medicare patients treated by Dr. John H. Niffenegger, MD in 2023

Hypertension	75
High Cholesterol	75
Stroke	11
Ischemic Heart Disease	37
Depression	21
Chronic Kidney Disease	28
Asthma	11
Osteoperosis	20
Atrial Fibrilation	24
Heart Failure	18
Chronic Obstructive Pulmonary Disease	20
Diabetes	29
Dementia	7
Cancer	19

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

The top procedures that Dr. John H. Niffenegger, MD treated as a retina specialist in Sarasota, FL during 2024 were eye procedures, injections, diagnostic imaging and ultrasound (sonogram).

Volume of procedures performed by Dr. John H. Niffenegger, MD for Medicare patients.

diagnostic imaging	38
doctor visit	149
eye procedures	7521
injections	2071
ultrasound (sonogram)	38

2024 Medicare Patient Data

Information about Medicare patients treated by Dr. John H. Niffenegger, MD.

**Gender**
Male	630
Female	809

**Ethnicity**
Non-Hispanic White	1344
Black	14
Hispanic	26
Asian	0
Other	41
Native American	0

**Age**
From 65 to 74	376
From 75 to 84	635
85 and over	410
Less than 65	18

Conditions of Medicare patients treated by Dr. John H. Niffenegger, MD in 2024

Hypertension	75
High Cholesterol	75
Stroke	12
Ischemic Heart Disease	40
Depression	21
Chronic Kidney Disease	31
Asthma	11
Osteoperosis	20
Atrial Fibrilation	26
Heart Failure	19
Chronic Obstructive Pulmonary Disease	18
Diabetes	30
Dementia	7
Cancer	19

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Volume of procedures performed by Dr. John H. Niffenegger, MD for Medicare patients.

The highest averages for the top procedures that Dr. John H. Niffenegger, MD treated as a retina specialist in Sarasota, FL were eye procedures, injections, diagnostic imaging and ultrasound (sonogram).

diagnostic imaging	95
doctor visit	598
eye procedures	10875
injections	2795
photocoagulation	22
prophylaxis (preventive treatment)	22
ultrasound (sonogram)	95

Average Medicare Patient Data From 2012 - 2024

Information about Medicare patients treated by Dr. John H. Niffenegger, MD.

**Gender**
Male	703
Female	867

**Ethnicity**
Black / African American	13
Asian / Pacific Islander	5
Non-Hispanic White	1485
Native American / Alaskan Native	0
Hispanic	20
Other	32

**Age**
75 to 84	619
85 and over	445
Less than 65	28
65 to 74	477

Average of Total of Conditions of Medicare patients treated by Dr. John H. Niffenegger, MD From 2012 - 2024

The highest averages of the most common conditions of Medicare patients that Dr. John H. Niffenegger, MD treated were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	67
High Cholesterol	65
Stroke	6
Ischemic Heart Disease	39
Depression	17
Chronic Kidney Disease	27
Asthma	7
Osteoporosis	12
Heart Failure	16
Chronic Obstructive Pulmonary Disease	14
Diabetes	26
Atrial Fibrillation	16
Cancer	14
Dementia	9

Education & Training

He has a state license in Florida.

Licensed In: Florida

Ratings & Reviews

Dr. John H. Niffenegger, MD has an exceptional overall rating with an average of 5.0 out of 5 stars based on 2 ratings. We collect ratings and reviews of Dr. John H. Niffenegger, MD from all over the web to help you find the right in Sarasota, FL.

Overall Rating

(2 Ratings)

Leave a Review

Reviews Left On DocSpot

Overall Rating: 5.0 2019-02-20

There is no finer person or surgeon than Dr Niffenegger.  He has performed very delicate surgeries on both my eyes with awesome results.  He is a very gentle person and consummate professional.

Overall Rating: 5.0 2018-08-02

If you are in need of an excellent professional care for eye/retinal problems, there is no finer place to receive care. The staff makes it a joy to visit for an appointment. Charming, caring and friendly. The doctor is professional, and obviously one of the best at what he does.

General Payments

These charts describe general payments received by Dr. John H. Niffenegger, MD. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
US Retina LLC	$12,306 $12,306
Genentech USA, Inc.	$1,196 LUCENTIS $1,193	$3
Valeant Pharmaceuticals North America LLC	$829 STELLARIS $646	STELLARIS PC $164	OPHTHALMIC INSTRUMENTS $19
Regeneron Pharmaceuticals, Inc.	$618 EYLEA (aflibercept) Injection $324	EYLEA aflibercept injection $293
Regeneron Healthcare Solutions, Inc.	$329 Eylea $229	EYLEA (aflibercept) Injection $59	EYLEA aflibercept injection $42
Other	$556 OZURDEX $230	BEOVU $107	Foresee Home $45	ACTHAR $20	ILUVIEN $18	Other $136

**Types of Payments**
Acquisitions	$8,314
Current or prospective ownership or investment interest	$3,991
Food and Beverage	$2,837
Travel and Lodging	$646
Education	$45

Ownership and Interest Payments

This table describes ownership payments received by Dr. John H. Niffenegger, MD.

US Retina LLC	2022	$12,500.00	Physician Covered Recipient	Shares
US Retina LLC	2020	$12,500.00	Physician Covered Recipient	Shares
US Retina LLC	2017	$12,500.00	Physician Covered Recipient	Shares
US Retina LLC	2019	$12,500.00	Physician Covered Recipient	Shares
US Retina LLC	2018	$12,500.00	Physician Covered Recipient	Shares
US Retina LLC	2016	$12,500.00	Physician Covered Recipient	Shares
US Retina LLC	2015	$12,500.00	Physician Covered Recipient	Shares

Biography

Dr. John Niffenegger is a specialist in surgery and vitreoretinal diseases (retina and vitreous). He is affiliated with Sarasota Memorial Health Care System. Dr. Niffenegger's education and training includes medical school at Case Western Reserve University School of Medicine and residency at Massachusetts Eye and Ear Infirmary.

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Dr. John H. Niffenegger, MD

Office Locations

In The News

Noteworthy Medicare Patient Procedures Performed by Dr. John H. Niffenegger, MD in 2024

By Volume:

By Affordability:

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

2013 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John H. Niffenegger, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John H. Niffenegger, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John H. Niffenegger, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John H. Niffenegger, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John H. Niffenegger, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John H. Niffenegger, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John H. Niffenegger, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John H. Niffenegger, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John H. Niffenegger, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John H. Niffenegger, MD in 2022

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

2023 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John H. Niffenegger, MD in 2023

Medicare Procedure and Patient Information

2024 Medicare Procedure Volume

2024 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John H. Niffenegger, MD in 2024

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2024

Average Medicare Patient Data From 2012 - 2024

Average of Total of Conditions of Medicare patients treated by Dr. John H. Niffenegger, MD From 2012 - 2024

Education & Training

Ratings & Reviews

General Payments

Ownership and Interest Payments

Biography

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