James Kolker, MD
NPI 1568433373 · Radiation Oncology Physician · Philadelphia, PA
Enrolled with Medicare as Practitioner - Radiation Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Kolker, MD is a Radiation Oncology Physician provider in Philadelphia, PA (NPI 1568433373).
Provider details
- NPI number
- 1568433373
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- K0873 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,665 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Calculation of Radiation Therapy Dose77300 | 448 | $33 |
| Ct Guidance for Insertion of Radiation Therapy Fields77014 | 418 | $45 |
| Design and Construction of Complex Radiation Treatment Device77334 | 154 | $61 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 102 | $67 |
| Radiation Treatment Management, 5 Treatment Sessions77427 | 97 | $187 |
| Complex Radiation Therapy Planning77263 | 82 | $169 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 2 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tamsulosin Hcl | 64 | 15 |
| Cefpodoxime Proxetil | 31 | 26 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-01-30
- Last updated
- 2011-11-28
Frequently asked questions
- What is James Kolker's NPI number?
- James Kolker's National Provider Identifier (NPI) is 1568433373, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Kolker's specialty?
- James Kolker is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is James Kolker located?
- James Kolker's practice location on file with NPPES is 3400 Spruce St, Philadelphia, PA 19104.
- What is James Kolker's phone number?
- The practice phone number listed in the NPPES registry for James Kolker is (215) 662-2428.
- Does James Kolker accept Medicare?
- James Kolker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Kolker's NPI active?
- Yes — James Kolker's NPI (1568433373) is active in the NPPES registry as of the last update on 2011-11-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.