NPI age
18 years
Enumerated 2007-08-12
● Active
Type 1 · Individual
Loretta J Nastoupil, M.D.
Nastoupil is 1 of 248 internal medicine providers in Houston and 1 of 1069 in Texas.
Primary specialty
Internal Medicine
Plus 2 subspecialties
Licensed in
TX, CO
2 states
Status
Active
No deactivations on record
Last NPPES update
2024-02-23
Source: monthly bulk 2026-05
Sole proprietor
Yes
Solo practice on file
How this provider compares
Across 1069 active internal medicine providers in Texas.
NPI age
18 years
≈ at median (18 yr)
State licenses
2 states
Top 77% — 22% of peers are multi-state
Subspecialties
2
In the 52% of peers with subspecialties
NPI lifetime · 2007 → 2026
2007-08Enumerated in NPPES
2007
2026
Where they practice
Practice location
1515 Holcombe Blvd
Houston, TX 770304000
Mailing address
Po Box 4439
Houston, TX 772104439
Additional practice locations
1 secondary location on file with NPPES.
Location 2
1 Mercado St Ste 100
Durango, CO 813017306
Specialties
-
Internal Medicine PrimaryAn internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine...
-
Internal MedicineAn internist with additional training who specializes in diseases of the blood, spleen and lymph. This specialist treats conditions such as anemia, clotting disorders, sickle cell disease, hemophilia, leukemia and lymphoma.
-
Internal MedicineAn 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) | 322170701 |
Multi-state credentialing: Licensed in 2 states. Useful context for credentialers building cross-state provider networks.
Practice context
Part of a multi-provider practice. 3675 other active providers share this practice address in NPPES.
Recently enumerated nearby: 1 new internal medicine provider has been added in Houston in the last 180 days.
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Request a quote →How to verify this provider
- 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.