NPI age
14 years
Enumerated 2011-06-06
● Active
Type 1 · Individual
Ronald L Maag, M.D.
Maag is 1 of 422 internal medicine providers in Houston and 1 of 2301 in Texas.
Primary specialty
Internal Medicine
Plus 3 subspecialties
Licensed in
TX, PA
2 states
Status
Active
No deactivations on record
Last NPPES update
2022-08-15
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 2301 active internal medicine providers in Texas.
NPI age
14 years
↓ 5 yr below median (19 yr)
State licenses
2 states
Top 88% — 11% of peers are multi-state
Subspecialties
2
In the 37% of peers with subspecialties
NPI lifetime · 2011 → 2026
2011-06Enumerated in NPPES
2011
2026
Where they practice
Practice location
7200 Cambridge St Fl 6
Houston, TX 770304202
Mailing address
7200 Cambridge St Fl 6
Houston, TX 770304202
Additional practice locations
1 secondary location on file with NPPES.
Location 2
500 University Dr
Hershey, PA 170332360
Specialties
-
Internal Medicine PrimaryAn internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
-
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,...
-
Internal MedicineAn internist who diagnoses, treats and supports patients with multiple organ dysfunction. This specialist may have administrative responsibilities for intensive care units and may also facilitate and coordinate patient care among the...
Practice context
Part of a multi-provider practice. 29 other active providers share this practice address in NPPES.
Provyx · Custom healthcare lists
Need all 2301 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.