John L. Lederer, M.D.
Radiation Oncology Physician · Honolulu, HI
John L. Lederer, M.D. is a radiation oncology physician with a practice address in Honolulu, Hawaii, and NPI 1740253327, issued on Feb 13, 2006. Check the license (Hawaii 6681, as entered in NPPES) on the Hawaii Medical Board; the Medicare figures below come from public CMS files.
- Name
- John L. Lederer
- Credential
- M.D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- 6681 HI
Self-reported in NPPES; status is on the state search - Practice location
- 2226 Liliha St Ste B2, Honolulu, HI 96817
- Phone
- (808) 547-6881
- Enumerated
- Feb 13, 2006
- Record last updated
- Jun 17, 2025
- Medicare enrollment
- Enrolled (PECOS I20040624001317); accepts Medicare assignment
- Medical or professional school
- Baylor College Of Medicine, 1980
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 28 in Hawaii → Look up another NPI →
Also registered at 2226 Liliha St Ste B2
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Samuel Birer, MDRadiation Oncology Physician1679004014
- Vincent Brown, M.D.Radiation Oncology Physician1902885247
- Christine CampbellNurse Practitioner1255812830
- Susie Chen, M.D.Radiation Oncology Physician1164609517
- Richard Lee, MD PHDRadiation Oncology Physician1922261718
- Laeton Pang, M.D.Radiation Oncology Physician1083687685
Verify John L. Lederer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersHawaii Medical Board
Search for license 6681Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% more Medicare Part D claims than the average radiation oncology physician in 2024
246 Medicare Part D claims for 114 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D.
Most prescribed
- Ciprofloxacin Hcl98 claims
- Sulfamethoxazole-Trimethoprim48 claims
- Cephalexin21 claims
- Lorazepam21 claims
- Tamsulosin Hcl21 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $286.13
12 payments; by number, the most common kind was food and beverage; the largest payer was Merck Sharp & Dohme LLC. The 3,275 providers of this specialty with any payment received $1,897.85 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Cancer Center OF Hawaii LLCHonolulu, HI
- Pacific Radiation Oncology LLCHonolulu, HI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John L. Lederer among 28 radiation oncology physician records in Hawaii
John L. Lederer, M.D. is one of 28 radiation oncology physician records with a practice address in Hawaii. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 57% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 75% of these records are
- Graduated1980 · median 2010 among the 21 with a school on file
- Record last updated2025 · 36% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a Hawaii practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in Hawaii
There are 28 radiation oncology physician records in Hawaii.
All 28 in Hawaii → Every provider in Honolulu → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Samuel Birer, MDHonolulu, HI 968171679004014
- Vincent Brown, M.D.Honolulu, HI 968171902885247
- Susie Chen, M.D.Honolulu, HI 968171164609517
- Ladonna Chung, M.D.Honolulu, HI 968171689709206
- Thanh Huynh, M.D.Honolulu, HI 968171982677902
- Mark Kanemori, M.D.Honolulu, HI 968171033182613
- Richard Lee, MD PHDHonolulu, HI 968171922261718
- Pi-Ju Liu, M.D.Honolulu, HI 968171851364897
Common questions
What is John L. Lederer, M.D.'s NPI number?
John L. Lederer, M.D.'s National Provider Identifier (NPI) is 1740253327, issued on Feb 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John L. Lederer, M.D. located?
The NPPES record lists a practice address at 2226 Liliha St Ste B2, Honolulu, HI, 96817. Phone: (808) 547-6881. Providers update this record themselves, so call before visiting.
How can I verify John L. Lederer, M.D.'s license?
NPPES lists Hawaii license number 6681, as entered by the provider. Search the Hawaii Medical Board at https://cca.hawaii.gov/pvl/boards/medical/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John L. Lederer, M.D. prescribe under Medicare Part D?
In 2024, John L. Lederer, M.D. had 246 Medicare Part D claims for 114 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
What is John L. Lederer, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.