John Ma, MD, PHD
NPI 1205067758 · Radiation Oncology Physician · Topeka, KS
Enrolled with Medicare as Practitioner - Radiation Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Ma, MD, PHD is a Radiation Oncology Physician provider in Topeka, KS (NPI 1205067758).
Provider details
- NPI number
- 1205067758
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 04 37990 (KS)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
16 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
9,478 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Ct Guidance for Insertion of Radiation Therapy Fields77014 | 5,413 | $41 |
| Radiation Treatment Management, 5 Treatment Sessions77427 | 1,180 | $175 |
| Calculation of Radiation Therapy Dose77300 | 718 | $30 |
| Design and Construction of Radiation Treatment Device for High Precision Radiation Therapy77338 | 332 | $209 |
| Design and Construction of Complex Radiation Treatment Device77334 | 330 | $56 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 297 | $133 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tamsulosin Hcl | 37 | 15 |
| Prednisone | 29 | 24 |
| Fluconazole | 27 | 11 |
| Dexamethasone | 20 | 14 |
| Pentoxifylline | 18 | — |
| Lidocaine Hclbrand: Lidocaine Hcl Viscous | 12 | — |
| Oxybutynin Chloridebrand: Oxybutynin Chloride Er | 12 | — |
These counts cover prescriptions paid through Medicare Part D in 2024 — they include 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 , 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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$240 across 7 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 1500 Sw 10th AveTopeka, KS 66604-1301Phone: (785) 624-6000
Registry dates
- Enumerated
- 2009-07-31
- Last updated
- 2026-02-13
- Certified
- 2026-02-13
Frequently asked questions
- What is John Ma's NPI number?
- John Ma's National Provider Identifier (NPI) is 1205067758, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Ma's specialty?
- John Ma is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is John Ma located?
- John Ma's practice location on file with NPPES is 1414 Sw 8th Ave, Topeka, KS 66606-1535.
- What is John Ma's phone number?
- The practice phone number listed in the NPPES registry for John Ma is (785) 354-5300.
- Does John Ma accept Medicare?
- John Ma is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Ma's NPI active?
- Yes — John Ma's NPI (1205067758) is active in the NPPES registry as of the last update on 2026-02-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.