Dr. John L. Lederer, M.D.
Radiation Oncology (Radiation Oncology Physician)
2226 Liliha St Ste B2
Honolulu, HI 96817
Who else practices at this address →
Honolulu County includes primary care (9% of residents) shortage areas. About shortage areas
- Medicare participating
At a glance
- Medical school
- Baylor College of Medicine (1980)
- Years since graduation
- 46
- In the NPI registry since
- 2006
- Medicare patients seen, 2024
- 288
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 1980Medical school: Baylor College of Medicine
- 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Radiation Oncology Physician primary
HI license 6681
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Pali Momi Medical Center Aiea, HI
Medical groups
- Cancer Center of Hawaii LLC (6 clinicians)
- Pacific Radiation Oncology LLC (6 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 288
- Services billed
- 3,383
- Patients’ average age
- 76
| Service | Times | Patients |
|---|---|---|
| Calculation of radiation therapy dose | 484 | 80 |
| Ct guidance for insertion of radiation therapy fields | 437 | 90 |
| Radiation treatment management, 5 treatment sessions | 377 | 84 |
| Intensity modulated treatment delivery, single or multiple fields/arcs,via narrow spatially and temporally modulated beams, binary, dynamic mlc, per treatment session | 281 | 100 |
| Design and construction of complex radiation treatment device | 246 | 54 |
| Stereoscopic x-ray guidance for localization of target volume for the delivery of radiation therapy | 242 | 74 |
| Design and construction of radiation treatment device for high precision radiation therapy | 155 | 57 |
| High precision radiation therapy planning | 113 | 55 |
| Radiation treatment delivery,3 or more separate treatment areas, custom blocking, tangential ports, wedges, rotational beam, compensators, electron beam; 6-10 mev | 111 | 58 |
| Tissue marker, implantable, any type, each | 101 | 37 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Ciprofloxacin Hcl Other prescribers in Honolulu, HI | 98 |
| Sulfamethoxazole-Trimethoprim (sulfamethoxazole/trimethoprim) Other prescribers in Honolulu, HI | 48 |
| Cephalexin Other prescribers in Honolulu, HI | 21 |
| Lorazepam Other prescribers in Honolulu, HI | 21 |
| Tamsulosin Hcl Other prescribers in Honolulu, HI | 21 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 10 companies reported 15 payments worth $526 in total to this clinician.
| Elekta, Inc. | $137 |
|---|---|
| Janssen Scientific Affairs, LLC | $84.60 |
| AstraZeneca Pharmaceuticals LP | $69.38 |
| Teleflex LLC | $67.81 |
| Siemens Medical Solutions USA, Inc. | $44.49 |
| Novartis Pharmaceuticals Corporation | $28.63 |
| Bayer HealthCare Pharmaceuticals Inc. | $26.33 |
| E.r. Squibb & Sons, L.l.c. | $25.47 |
| Food and Beverage | $526 |
|---|
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.
Industry-funded research
Named as a principal investigator on 1 industry-funded study in 2025, from 1 company. The companies reported $18,580 in research payments for these studies, mostly to the institutions running them.
- [Trial of device that is not approved or cleared by the U.S. FDA]
Teleflex LLC · Withheld · NCT04189913
From CMS Open Payments research payments, where companies name up to five principal investigators per payment. Research payments usually go to hospitals, universities and research sites, not to the investigator personally. A payment is not evidence of wrongdoing.