NPI age
21 years
Enumerated 2005-05-27
● Active
Type 1 · Individual
DR. Robert A. Marciniak, M.D.
Marciniak is 1 of 47 internal medicine providers in San Antonio and 1 of 576 in Texas.
Primary specialty
Internal Medicine
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2010-08-18
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 576 active internal medicine providers in Texas.
NPI age
21 years
↑ 2 yr above median (19 yr)
State licenses
1 state
18% of peers hold multiple states
Subspecialties
0
46% of peers hold subspecialties
NPI lifetime · 2005 → 2026
2005-05Enumerated in NPPES
2005
2026
Where they practice
Practice location
7979 Wurzbach Rd
San Antonio, TX 782294427
Mailing address
7703 Floyd Curl Dr, Mc 7977
San Antonio, TX 782293901
Specialties
-
Internal Medicine PrimaryAn internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and...
Identifiers
| Type | Value | Notes |
|---|---|---|
| 05 (TX) | 149475904 |
Practice context
Part of a multi-provider practice. 107 other active providers share this practice address in NPPES.
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- Confirm the NPI on NPPES.The CMS registry is the system of record. Open NPPES →
- Check the state license is currently active.State licensing boards publish current status; NPPES does not.
- Confirm payer enrollment if billing.NPI presence does not guarantee active enrollment with Medicare, Medicaid, or commercial payers.