NPI age
19 years
Enumerated 2006-06-12
● Active
Type 1 · Individual
DR. Douglas Warren Marshall, M.D.
Marshall is 1 of 149 psychiatry & neurology providers in San Antonio and 1 of 1903 in Texas.
Primary specialty
Psychiatry & Neurology
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2007-10-23
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 1903 active psychiatry & neurology providers in Texas.
NPI age
19 years
↑ 2 yr above median (17 yr)
State licenses
1 state
14% of peers hold multiple states
Subspecialties
0
34% of peers hold subspecialties
NPI lifetime · 2006 → 2026
2006-06Enumerated in NPPES
2006
2026
Where they practice
Practice location
400 Concord Plaza Dr, 300
San Antonio, TX 782166905
Mailing address
400 Concord Plaza Dr, 300
San Antonio, TX 782166905
Specialties
-
Psychiatry & Neurology PrimaryA Neurologist specializes in the diagnosis and treatment of diseases or impaired function of the brain, spinal cord, peripheral nerves, muscles, autonomic nervous system, and blood vessels that relate to these structures.
Identifiers
| Type | Value | Notes |
|---|---|---|
| 01 (TX) | 1425172 | CIGNA |
| 01 (TX) | 8H3630 | BCBS |
| 01 (TX) | P00067872 | RAILROAD MEDICARE |
| 01 (TX) | 4116848 | AETNA |
Practice context
Part of a multi-provider practice. 20 other active providers share this practice address in NPPES.
Recently enumerated nearby: 1 new psychiatry & neurology provider has been added in San Antonio in the last 180 days.
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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.