NPI age
2 years
Enumerated 2023-07-17
● Active
Type 1 · Individual
DR. Anath Christopher Lionel, MD, PHD
Lionel is 1 of 48 internal medicine providers in Houston and 1 of 78 in Texas.
Primary specialty
Internal Medicine
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2025-07-09
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 78 active internal medicine providers in Texas.
NPI age
2 years
↓ 14 yr below median (16 yr)
State licenses
1 state
14% of peers hold multiple states
Subspecialties
0
52% of peers hold subspecialties
NPI lifetime · 2023 → 2026
2023-07Enumerated in NPPES
2023
2026
Where they practice
Practice location
1515 Holcombe Blvd
Houston, TX 770304000
Mailing address
P O Box 4439
Houston, TX 772104439
Specialties
-
Internal Medicine PrimaryAn 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.
Practice context
Part of a multi-provider practice. 3675 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.