Robert Marciniak, M.D.
NPI 1700889201 · Medical Oncology Physician · San Antonio, TX
Enrolled with Medicare as Practitioner - Medical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Marciniak, M.D. is a Medical Oncology Physician provider in San Antonio, TX (NPI 1700889201).
Provider details
- NPI number
- 1700889201
- Entity type
- Individual
- Primary specialty
- Medical Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- L3005 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
21 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
36 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) |
|---|---|---|
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 20 | $116 |
| Emergency Department Visit With High Level of Medical Decision Making99285 | 16 | $167 |
Typical Medicare-allowed amounts for these services range $116–$167 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-05-27
- Last updated
- 2010-08-18
Frequently asked questions
- What is Robert Marciniak's NPI number?
- Robert Marciniak's National Provider Identifier (NPI) is 1700889201, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Marciniak's specialty?
- Robert Marciniak is listed in the NPPES registry with a primary specialty of Medical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Marciniak located?
- Robert Marciniak's practice location on file with NPPES is 7979 Wurzbach Rd, San Antonio, TX 78229-4427.
- What is Robert Marciniak's phone number?
- The practice phone number listed in the NPPES registry for Robert Marciniak is (210) 450-1000.
- Does Robert Marciniak accept Medicare?
- Robert Marciniak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Marciniak's NPI active?
- Yes — Robert Marciniak's NPI (1700889201) is active in the NPPES registry as of the last update on 2010-08-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.