NPI age
16 years
Enumerated 2009-11-06
● Active
Type 1 · Individual
Carl Peter Walther, M.D.
Walther is 1 of 294 internal medicine providers in Houston and 1 of 1582 in Texas.
Primary specialty
Internal Medicine
Plus 1 subspecialty
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2025-04-04
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 1582 active internal medicine providers in Texas.
NPI age
16 years
↓ 2 yr below median (18 yr)
State licenses
1 state
14% of peers hold multiple states
Subspecialties
1
In the 34% of peers with subspecialties
NPI lifetime · 2009 → 2026
2009-11Enumerated in NPPES
2009
2026
Where they practice
Practice location
2525a Holly Hall St
Houston, TX 770544124
Mailing address
6620 Main St Ste 11b.38
Houston, TX 770302348
Additional practice locations
1 secondary location on file with NPPES.
Location 2
6431 Fannin St, Suite 5.134
Houston, TX 770301501
Specialties
-
Internal Medicine PrimaryAn internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
-
Internal MedicineA physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer,...
Identifiers
| Type | Value | Notes |
|---|---|---|
| 05 (TX) | 336291503 |
Practice context
Part of a multi-provider practice. 19 other active providers share this practice address in NPPES.
Provyx · Custom healthcare lists
Need all 1582 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.