NPI age
19 years
Enumerated 2006-06-28
● Active
Type 1 · Individual
DR. Shirley Gay Merritt, MD
Merritt is 1 of 876 psychiatry & neurology providers in Houston and 1 of 4391 in Texas.
Primary specialty
Psychiatry & Neurology
Plus 2 subspecialties
Licensed in
TX, NC
2 states
Status
Active
No deactivations on record
Last NPPES update
2014-11-04
Source: monthly bulk 2026-05
Sole proprietor
Yes
Solo practice on file
How this provider compares
Across 4391 active psychiatry & neurology providers in Texas.
NPI age
19 years
↑ 3 yr above median (16 yr)
State licenses
2 states
Top 87% — 12% of peers are multi-state
Subspecialties
1
In the 34% of peers with subspecialties
NPI lifetime · 2006 → 2026
2006-06Enumerated in NPPES
2006
2026
Where they practice
Practice location
14142 Ivy Bluff Court
Houston, TX 77062
Mailing address
14142 Ivy Bluff Court
Houston, TX 77062
Specialties
-
Psychiatry & Neurology PrimaryA Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders...
-
SpecialistAn individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
Identifiers
| Type | Value | Notes |
|---|---|---|
| 01 | 0A3545 | PTAN |
Multi-state credentialing: Licensed in 2 states. Useful context for credentialers building cross-state provider networks.
Practice context
Solo or small practice. No other active providers share this practice address in NPPES. This provider is listed as a sole proprietor.
Recently enumerated nearby: 10 new psychiatry & neurology providers have been added in Houston 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.