Robert A. Marciniak, M.D.
Medical Oncology Physician · San Antonio, TX
Robert A. Marciniak, M.D. is a medical oncology physician with a practice address in San Antonio, Texas, and NPI 1700889201, issued on May 27, 2005. Check the license (Texas L3005, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Robert A. Marciniak
- Credential
- M.D.
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- L3005 TX
Self-reported in NPPES; status is on the state search - Practice location
- 7979 Wurzbach RD, San Antonio, TX 78229
- Phone
- (210) 450-1000
- Enumerated
- May 27, 2005
- Record last updated
- Aug 18, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (210) 450-1150
- Medicaid ID
- 149475904 TX
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 547 in Texas → Look up another NPI →
Also registered at 7979 Wurzbach RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Christina Agyin, APRN-BC FNPFamily Nurse Practitioner1386831386
- Brittany Altermatt, ANPAdult Health Nurse Practitioner1902939358
- Elise Alvarez, MS, GCGenetic Counselor (M.S.)1609691005
- Shammi Anholt, PTPhysical Therapist1821745712
- Athanassios Argiris, MDHematology & Oncology Physician1174608509
- Sukeshi Arora, MDMedical Oncology Physician1386805604
Verify Robert A. Marciniak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license L3005Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average medical oncology physician in 2024
24 Medicare Part D claims for 20 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Robert A. Marciniak among 547 medical oncology physician records in Texas
Robert A. Marciniak, M.D. is one of 547 medical oncology physician records with a practice address in Texas. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 94% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileNo · 76% of these records are
- Record last updated2010 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Oncology Physician providers in Texas
There are 547 medical oncology physician records in Texas.
All 547 in Texas → Every provider in San Antonio → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Muralidhar Beeram, M.D.San Antonio, TX 782291265426282
- Ronald Drengler, M.D.San Antonio, TX 782291265459168
- Virginia Kaklamani, MDSan Antonio, TX 782291841235439
- Anand Karnad, M.D.San Antonio, TX 782291023011624
- Amy Lang, M.D.San Antonio, TX 782291104850486
- Charles Lemaistre, M.D.San Antonio, TX 782291033176946
- Daruka Mahadevan, MD, PHDSan Antonio, TX 782291841398302
- Monica Mita, MDSan Antonio, TX 782291760450043
Common questions
What is Robert A. Marciniak, M.D.'s NPI number?
Robert A. Marciniak, M.D.'s National Provider Identifier (NPI) is 1700889201, issued on May 27, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Robert A. Marciniak, M.D. located?
The NPPES record lists a practice address at 7979 Wurzbach RD, San Antonio, TX, 78229. Phone: (210) 450-1000. Providers update this record themselves, so call before visiting.
How can I verify Robert A. Marciniak, M.D.'s license?
NPPES lists Texas license number L3005, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Robert A. Marciniak, M.D. prescribe under Medicare Part D?
In 2024, Robert A. Marciniak, M.D. had 24 Medicare Part D claims for 20 beneficiaries; the average among medical oncology physician prescribers was 703. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.