NPI age
15 years
Enumerated 2010-08-26
● Active
Type 1 · Individual
DR. Javier Fernando Dieguez, M.D.
Dieguez is 1 of 14 internal medicine providers in Amarillo and 1 of 1318 in Texas.
Primary specialty
Internal Medicine
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2019-05-15
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 1318 active internal medicine providers in Texas.
NPI age
15 years
↓ 3 yr below median (18 yr)
State licenses
1 state
15% of peers hold multiple states
Subspecialties
0
57% of peers hold subspecialties
NPI lifetime · 2010 → 2026
2010-08Enumerated in NPPES
2010
2026
Where they practice
Practice location
6700 W 9th Ave
Amarillo, TX 791061701
Mailing address
Po Box 840020
Dallas, TX 752840020
Specialties
-
Internal Medicine PrimaryAn internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex...
Identifiers
| Type | Value | Notes |
|---|---|---|
| 05 (TX) | 347739001 |
Practice context
Part of a multi-provider practice. 62 other active providers share this practice address in NPPES.
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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.