NPI age
13 years
Enumerated 2013-05-15
● Active
Type 1 · Individual
Margaret Ellen Flanagan, M.D.
Flanagan is 1 of 6 pathology providers in San Antonio and 1 of 25 in Texas.
Primary specialty
Pathology
Plus 2 subspecialties
Licensed in
TX, WA
2 states
Status
Active
No deactivations on record
Last NPPES update
2023-09-06
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 25 active pathology providers in Texas.
NPI age
13 years
↓ 6 yr below median (19 yr)
State licenses
2 states
Top 80% — 20% of peers are multi-state
Subspecialties
1
In the 44% of peers with subspecialties
NPI lifetime · 2013 → 2026
2013-05Enumerated in NPPES
2013
2026
Where they practice
Practice location
4502 Medical Dr
San Antonio, TX 782294402
Mailing address
4502 Medical Dr
San Antonio, TX 782294402
Specialties
-
Pathology PrimaryA neuropathologist is expert in the diagnosis of diseases of the nervous system and skeletal muscles and functions as a consultant primarily to neurologists and neurosurgeons. The neuropathologist is knowledgeable in the infirmities of...
-
PathologyA pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses...
Identifiers
| Type | Value | Notes |
|---|---|---|
| 05 (TX) | 1972949154 |
Multi-state credentialing: Licensed in 2 states. Useful context for credentialers building cross-state provider networks.
Practice context
Part of a multi-provider practice. 1646 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.
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