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Home > HI Providers > Radiation Oncologists

Dr. John L. Lederer, MD

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Specializes in: Radiation Oncology

Baylor College of Medicine (1980)

2226 Liliha Street Suite B2
Honolulu, HI 96817

(808) 547-6881

Dr. John L. Lederer, MD is a radiation oncologist in Honolulu, HI specializing in radiation oncology. He graduated from Baylor College of Medicine in 1980 and has 46 years of experience. Dr. John L. Lederer, MD is affiliated with Hawaii Pacific Health, Straub Medical Center, Pali Momi Medical Center, PACIFIC RADIATION ONCOLOGY LLC, Kapiolani Medical Center for Women & Children and CANCER CENTER OF HAWAII LLC.

Office Locations

Kapiolani Medical Center for Women & Children

2226 Liliha Street Suite B2
Honolulu, HI 96817

(808) 547-6881

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In The News (see more mentions in the news)

“Dr. John L. Lederer, a Honolulu radiation oncologist who is listed as receiving $764,649.51 in 2012, said the number greatly overstates what he actually got from Medicare because it includes what...”—"List of isles' top 20 providers corrected", Honolulu Star-Advertiser, April 2014

“The Ninth Circuit Court of Appeals affirmed Monday an injunction by U.S. District Judge Leslie E. Kobayashi that allows Dr. John Lederer to use oncology radiation facilities at Queen's.”—"Physician can use Queen's radiation facilities, court says", Honolulu Star-Advertiser, February 2014

“Cancer radiation treatment specialist Dr. John Lederer will be able to continue using oncology radiation facilities at the Queen's Medical Center, but the other five doctors at Pacific Radiation...”—"Injunction makes Queen's share its radiation facilities", Honolulu Star-Advertiser, March 2012

Noteworthy Medicare Patient Procedures Performed by Dr. John L. Lederer, MD in 2023

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

Top 5%

By Volume:

marker placement for prostate radiation therapy

By Affordability:

marker placement for prostate radiation therapy

In 2023, among providers in related specialties within Hawaii, Dr. John L. Lederer, MD performed more marker placement for prostate radiation therapy procedures for Medicare patients than 95% of them and he also had a list price for marker placement for prostate radiation therapy 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 Affordability:

conventional external beam radiation therapy

In 2012, Dr. John L. Lederer, MD had a list price for conventional external beam radiation therapy that was lower than the list prices billed to Medicare by 75% of providers in related specialties within Hawaii. 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 L. Lederer, MD treated as a radiation oncologist in Honolulu, HI during 2012 were radiation therapy and marker placement for prostate radiation therapy.

Volume of procedures performed by Dr. John L. Lederer, MD for Medicare patients.

doctor visit	792
marker placement for prostate radiation therapy	19
radiation therapy	1264

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. John L. Lederer, MD treated as a radiation oncologist in Honolulu, HI during 2013 were radiation therapy and marker placement for prostate radiation therapy.

Volume of procedures performed by Dr. John L. Lederer, MD for Medicare patients.

doctor visit	741
marker placement for prostate radiation therapy	22
radiation therapy	1304

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. John L. Lederer, MD.

**Gender**
Male	276
Female	176

**Ethnicity**
Non-Hispanic White	113
Black	0
Hispanic	0
Asian	246
Other	63
Native American	0

**Age**
From 65 to 74	221
From 75 to 84	186
85 and over	31
Less than 65	14

Conditions of Medicare patients treated by Dr. John L. Lederer, MD in 2013

Hypertension	75
High Cholesterol	75
Stroke	5
Ischemic Heart Disease	31
Depression	7
Chronic Kidney Disease	28
Asthma	11
Osteoperosis	7
Atrial Fibrilation	9
Heart Failure	10
Chronic Obstructive Pulmonary Disease	13
Diabetes	35
Dementia	4
Cancer	75

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. John L. Lederer, MD treated as a radiation oncologist in Honolulu, HI during 2014 were radiation therapy and marker placement for prostate radiation therapy.

Volume of procedures performed by Dr. John L. Lederer, MD for Medicare patients.

doctor visit	816
marker placement for prostate radiation therapy	25
radiation therapy	1218

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. John L. Lederer, MD.

**Gender**
Male	256
Female	164

**Ethnicity**
Non-Hispanic White	97
Black	0
Hispanic	0
Asian	237
Other	56
Native American	0

**Age**
From 65 to 74	201
From 75 to 84	168
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. John L. Lederer, MD in 2014

Hypertension	75
High Cholesterol	74
Stroke	5
Ischemic Heart Disease	32
Depression	6
Chronic Kidney Disease	26
Asthma	8
Osteoperosis	9
Atrial Fibrilation	10
Heart Failure	10
Chronic Obstructive Pulmonary Disease	10
Diabetes	36
Dementia	4
Cancer	75

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. John L. Lederer, MD treated as a radiation oncologist in Honolulu, HI during 2015 were radiation therapy and marker placement for prostate radiation therapy.

Volume of procedures performed by Dr. John L. Lederer, MD for Medicare patients.

doctor visit	820
marker placement for prostate radiation therapy	25
radiation therapy	477

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. John L. Lederer, MD.

**Gender**
Male	580
Female	378

**Ethnicity**
Non-Hispanic White	236
Black	0
Hispanic	0
Asian	516
Other	146
Native American	0

**Age**
From 65 to 74	470
From 75 to 84	376
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. John L. Lederer, MD in 2015

Hypertension	75
High Cholesterol	75
Stroke	5
Ischemic Heart Disease	29
Depression	6
Chronic Kidney Disease	25
Asthma	10
Osteoperosis	9
Atrial Fibrilation	6
Heart Failure	8
Chronic Obstructive Pulmonary Disease	9
Diabetes	32
Dementia	6
Cancer	75

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. John L. Lederer, MD treated as a radiation oncologist in Honolulu, HI during 2016 were radiation therapy and marker placement for prostate radiation therapy.

Volume of procedures performed by Dr. John L. Lederer, MD for Medicare patients.

doctor visit	812
marker placement for prostate radiation therapy	20
radiation therapy	635

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. John L. Lederer, MD.

**Gender**
Male	263
Female	165

**Ethnicity**
Non-Hispanic White	100
Black	0
Hispanic	0
Asian	236
Other	72
Native American	0

**Age**
From 65 to 74	227
From 75 to 84	136
85 and over	52
Less than 65	13

Conditions of Medicare patients treated by Dr. John L. Lederer, MD in 2016

Hypertension	75
High Cholesterol	75
Stroke	6
Ischemic Heart Disease	29
Depression	7
Chronic Kidney Disease	31
Asthma	13
Osteoperosis	11
Atrial Fibrilation	9
Heart Failure	10
Chronic Obstructive Pulmonary Disease	11
Diabetes	36
Dementia	6
Cancer	75

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. John L. Lederer, MD treated as a radiation oncologist in Honolulu, HI during 2017 were radiation therapy and marker placement for prostate radiation therapy.

Volume of procedures performed by Dr. John L. Lederer, MD for Medicare patients.

doctor visit	687
marker placement for prostate radiation therapy	24
radiation therapy	726

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. John L. Lederer, MD.

**Gender**
Male	209
Female	186

**Ethnicity**
Non-Hispanic White	90
Black	0
Hispanic	0
Asian	199
Other	85
Native American	0

**Age**
From 65 to 74	214
From 75 to 84	125
85 and over	45
Less than 65	11

Conditions of Medicare patients treated by Dr. John L. Lederer, MD in 2017

Hypertension	75
High Cholesterol	67
Stroke	6
Ischemic Heart Disease	27
Depression	9
Chronic Kidney Disease	32
Asthma	10
Osteoperosis	12
Atrial Fibrilation	10
Heart Failure	10
Chronic Obstructive Pulmonary Disease	10
Diabetes	36
Dementia	10
Cancer	75

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. John L. Lederer, MD treated as a radiation oncologist in Honolulu, HI during 2018 were radiation therapy and marker placement for prostate radiation therapy.

Volume of procedures performed by Dr. John L. Lederer, MD for Medicare patients.

doctor visit	782
marker placement for prostate radiation therapy	37
radiation therapy	657

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. John L. Lederer, MD.

**Gender**
Male	263
Female	183

**Ethnicity**
Non-Hispanic White	94
Black	0
Hispanic	0
Asian	247
Other	70
Native American	0

**Age**
From 65 to 74	251
From 75 to 84	139
85 and over	39
Less than 65	17

Conditions of Medicare patients treated by Dr. John L. Lederer, MD in 2018

Hypertension	74
High Cholesterol	75
Stroke	3
Ischemic Heart Disease	24
Depression	10
Chronic Kidney Disease	31
Asthma	8
Osteoperosis	15
Atrial Fibrilation	9
Heart Failure	8
Chronic Obstructive Pulmonary Disease	10
Diabetes	35
Dementia	7
Cancer	75

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. John L. Lederer, MD treated as a radiation oncologist in Honolulu, HI during 2019 were radiation therapy and marker placement for prostate radiation therapy.

Volume of procedures performed by Dr. John L. Lederer, MD for Medicare patients.

doctor visit	616
marker placement for prostate radiation therapy	28
radiation therapy	488

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. John L. Lederer, MD.

**Gender**
Male	243
Female	167

**Ethnicity**
Non-Hispanic White	86
Black	0
Hispanic	0
Asian	230
Other	66
Native American	0

**Age**
From 65 to 74	224
From 75 to 84	137
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. John L. Lederer, MD in 2019

Hypertension	72
High Cholesterol	75
Stroke	4
Ischemic Heart Disease	24
Depression	10
Chronic Kidney Disease	36
Asthma	8
Osteoperosis	10
Atrial Fibrilation	9
Heart Failure	10
Chronic Obstructive Pulmonary Disease	9
Diabetes	34
Dementia	6
Cancer	75

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. John L. Lederer, MD treated as a radiation oncologist in Honolulu, HI during 2020 were radiation therapy and marker placement for prostate radiation therapy.

Volume of procedures performed by Dr. John L. Lederer, MD for Medicare patients.

doctor visit	648
marker placement for prostate radiation therapy	29
radiation therapy	185

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. John L. Lederer, MD.

**Gender**
Male	203
Female	114

**Ethnicity**
Non-Hispanic White	72
Black	0
Hispanic	0
Asian	172
Other	53
Native American	0

**Age**
From 65 to 74	176
From 75 to 84	111
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. John L. Lederer, MD in 2020

Hypertension	69
High Cholesterol	75
Stroke	4
Ischemic Heart Disease	27
Depression	5
Chronic Kidney Disease	36
Asthma	6
Osteoperosis	11
Atrial Fibrilation	7
Heart Failure	11
Chronic Obstructive Pulmonary Disease	7
Diabetes	32
Dementia	5
Cancer	75

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. John L. Lederer, MD treated as a radiation oncologist in Honolulu, HI during 2021 were radiation therapy and marker placement for prostate radiation therapy.

Volume of procedures performed by Dr. John L. Lederer, MD for Medicare patients.

doctor visit	504
marker placement for prostate radiation therapy	28
radiation therapy	264

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. John L. Lederer, MD.

**Gender**
Male	187
Female	149

**Ethnicity**
Non-Hispanic White	75
Black	0
Hispanic	0
Asian	185
Other	57
Native American	0

**Age**
From 65 to 74	165
From 75 to 84	130
85 and over	27
Less than 65	14

Conditions of Medicare patients treated by Dr. John L. Lederer, MD in 2021

Hypertension	73
High Cholesterol	75
Stroke	4
Ischemic Heart Disease	23
Depression	10
Chronic Kidney Disease	41
Asthma	7
Osteoperosis	14
Atrial Fibrilation	9
Heart Failure	10
Chronic Obstructive Pulmonary Disease	8
Diabetes	33
Dementia	9
Cancer	75

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. John L. Lederer, MD treated as a radiation oncologist in Honolulu, HI during 2022 were radiation therapy and marker placement for prostate radiation therapy.

Volume of procedures performed by Dr. John L. Lederer, MD for Medicare patients.

doctor visit	572
marker placement for prostate radiation therapy	34
radiation therapy	254

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. John L. Lederer, MD.

**Gender**
Male	170
Female	123

**Ethnicity**
Non-Hispanic White	61
Black	0
Hispanic	0
Asian	162
Other	53
Native American	0

**Age**
From 65 to 74	142
From 75 to 84	125
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. John L. Lederer, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	10
Ischemic Heart Disease	19
Depression	8
Chronic Kidney Disease	34
Asthma	10
Osteoperosis	19
Atrial Fibrilation	13
Heart Failure	13
Chronic Obstructive Pulmonary Disease	12
Diabetes	32
Dementia	5
Cancer	75

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. John L. Lederer, MD for Medicare patients.

The highest averages for the top procedures that Dr. John L. Lederer, MD treated as a radiation oncologist in Honolulu, HI were radiation therapy.

doctor visit	708
radiation therapy	679

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. John L. Lederer, MD.

**Gender**
Male	240
Female	164

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	220
Non-Hispanic White	93
Native American / Alaskan Native	0
Hispanic	0
Other	65

**Age**
75 to 84	148
85 and over	17
Less than 65	6
65 to 74	208

Average of Total of Conditions of Medicare patients treated by Dr. John L. Lederer, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. John L. Lederer, MD treated were cancer, high cholesterol, hypertension and diabetes.

Hypertension	67
High Cholesterol	67
Stroke	4
Ischemic Heart Disease	24
Depression	7
Chronic Kidney Disease	29
Asthma	8
Osteoporosis	10
Heart Failure	9
Chronic Obstructive Pulmonary Disease	9
Diabetes	31
Atrial Fibrillation	8
Dementia	5
Cancer	68

Education & Training

Dr. John L. Lederer, MD graduated from Baylor College of Medicine in 1980. He completed residency at Baylor University Medical Center. He is certified by the Internal Medicine Radiation Oncology and has a state license in Hawaii.

Medical School: Baylor College of Medicine (1980)

Residency: Baylor University Medical Center

Board Certification: Internal Medicine Radiation Oncology

Licensed In: Hawaii

Affiliations & Hospitals

Dr. John L. Lederer, MD is associated with these hospitals and organizations:

Hawaii Pacific Health

Straub Medical Center

Pali Momi Medical Center

PACIFIC RADIATION ONCOLOGY LLC

Kapiolani Medical Center for Women & Children

CANCER CENTER OF HAWAII LLC

Ratings & Reviews

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General Payments

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

**Payments by Company**
Varian Medical Systems, Inc.	$795 TrueBeam $574	ARIA $71	Calypso $62	Treatment Planning Systems $23	Edge $16	Other $49
Augmenix, Inc.	$628 SpaceOAR $628
Bayer HealthCare Pharmaceuticals Inc.	$465 Xofigo $393	Nubeqa $37	Nexavar $35
Eckert & Ziegler, BEBIG	$331 $331
Palette Life Sciences, Inc.	$279 Barrigel $40	$240
Other	$1,909 OPDIVO $231	ORGOVYX $144	Varian Ethos Treatment Planning $141	IMFINZI $136	ELEKTA MEDICAL LINEAR ACCELERATOR $136	Other $1,122

**Types of Payments**
Food and Beverage	$4,407

Research Payments

Dr. John L. Lederer, MD has received 8 research payments totaling $90,948.

Biography

Dr. John Lederer is a radiation oncology specialist in Honolulu, HI. He graduated from Baylor College of Medicine. Dr. Lederer trained at Baylor University Medical Center and a hospital affiliated with the University of Utah for residency. He is affiliated with Hawaii Pacific Health.

Select Year:

Dr. John L. Lederer, MD

Office Locations

In The News (see more mentions in the news)

Noteworthy Medicare Patient Procedures Performed by Dr. John L. Lederer, MD in 2023

By Volume:

By Affordability:

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 L. Lederer, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John L. Lederer, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John L. Lederer, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John L. Lederer, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John L. Lederer, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John L. Lederer, MD in 2018

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

2019 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John L. Lederer, MD in 2019

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John L. Lederer, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John L. Lederer, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. John L. Lederer, MD in 2022

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Average Medicare Patient Data From 2012 - 2022

Average of Total of Conditions of Medicare patients treated by Dr. John L. Lederer, MD From 2012 - 2022

Education & Training

Affiliations & Hospitals

Ratings & Reviews

General Payments

Research Payments

Biography

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