NPI age
17 years
Enumerated 2009-05-13
● Active
Type 1 · Individual
Jaclyn Herfarth Harrison, MD
Harrison is 1 of 1938 internal medicine providers in Houston and 1 of 12343 in Texas.
Primary specialty
Internal Medicine
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2020-04-06
Source: monthly bulk 2026-05
Sole proprietor
Yes
Solo practice on file
How this provider compares
Across 12343 active internal medicine providers in Texas.
NPI age
17 years
≈ at median (17 yr)
State licenses
1 state
12% of peers hold multiple states
Subspecialties
0
33% of peers hold subspecialties
NPI lifetime · 2009 → 2026
2009-05Enumerated in NPPES
2009
2026
Where they practice
Practice location
1900 North Loop W Ste 580
Houston, TX 770188163
Mailing address
1900 North Loop W Ste 580
Houston, TX 770188163
Additional practice locations
1 secondary location on file with NPPES.
Location 2
1635 North Loop W
Houston, TX 77008
Specialties
-
Internal Medicine PrimaryA 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,...
Practice context
Part of a multi-provider practice. 4 other active providers share this practice address in NPPES.
Recently enumerated nearby: 6 new internal medicine providers have been added in Houston in the last 180 days.
See all →
Provyx · Custom healthcare lists
Need all 12343 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.