NPI age
20 years
Enumerated 2005-11-15
● Active
Type 1 · Individual
DR. Nathan Shumway, D.O., FACP
Shumway is 1 of 95 internal medicine providers in San Antonio and 1 of 1069 in Texas.
Primary specialty
Internal Medicine
Plus 1 subspecialty
Licensed in
TX, HI
2 states
Status
Active
No deactivations on record
Last NPPES update
2016-01-28
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 1069 active internal medicine providers in Texas.
NPI age
20 years
↑ 2 yr above median (18 yr)
State licenses
2 states
Top 77% — 22% of peers are multi-state
Subspecialties
1
In the 52% of peers with subspecialties
NPI lifetime · 2005 → 2026
2005-11Enumerated in NPPES
2005
2026
Where they practice
Practice location
18707 Hardy Oak Blvd, Suite 320
San Antonio, TX 782584791
Mailing address
Po Box 911230
Dallas, TX 753911230
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 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 |
|---|---|---|
| 01 (TX) | P01547652 | RAILROAD MEDICARE |
| 05 (TX) | 349764601 |
Multi-state credentialing: Licensed in 2 states. Useful context for credentialers building cross-state provider networks.
Practice context
Part of a multi-provider practice. 12 other active providers share this practice address in NPPES.
Provyx · Custom healthcare lists
Need all 1069 Internal Medicine providers in Texas?
Get the full list as a CSV with verified work emails, direct phones, and LinkedIn URLs.
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.