NPI age
20 years
Enumerated 2005-12-01
● Active
Type 1 · Individual
MR. Thomas J Harris, M.D.
Harris is 1 of 9 internal medicine providers in Waco and 1 of 1069 in Texas.
Primary specialty
Internal Medicine
Plus 1 subspecialty
Licensed in
VA, AZ
2 states
Status
Active
No deactivations on record
Last NPPES update
2012-09-04
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
2005-12Enumerated in NPPES
2005
2026
Where they practice
Practice location
1700 W. Highway 6
Waco, TX 76712
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 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) | 220660901 | |
| 05 (VA) | 1992789291 | |
| 01 (TX) | P01052034 | RAILROAD MEDICARE |
Multi-state credentialing: Licensed in 2 states. Useful context for credentialers building cross-state provider networks.
Practice context
Solo or small practice. No 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.