Physician Profile
Unclaimed ProfileAbout MARCINIAK
Robert A. Marciniak, M.D. is a healthcare provider in San Antonio, TX specializing in medical oncology. Medicare claims data shows Robert provided 36 services to 36 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (210) 450-1000
- Email not available
Practice Locations
7979 WURZBACH RD
San Antonio, TX 78229
Procedures Most Often Billed to Medicare
36 services · 36 patients · 2 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Emergency department visit with moderate level of medical decision making | Office visit | 99284 |
20 |
| Emergency department visit with high level of medical decision making | Office visit | 99285 |
16 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other oncologists at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 7 related providers in 1 group
Other oncologists in San Antonio 7
Same specialty, same city.
Common questions
What is Dr. Marciniak's specialty?
Dr. Marciniak is an oncologist in San Antonio, TX. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “Medical Oncology”.
NPI registry
Where can I find Dr. Marciniak?
Dr. Marciniak is listed at 7979 WURZBACH RD, San Antonio, TX 78229. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Marciniak?
The number on file is (210) 450-1000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Marciniak?
Dr. Marciniak's National Provider Identifier is 1700889201. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
How much experience does Dr. Marciniak have?
Dr. Marciniak has 21+ years experience. Registered with an NPI since 2005. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
What is Dr. Marciniak known for?
According to Medicare billing data, Dr. Marciniak the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Marciniak's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Marciniak. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.