● Active Type 1 · Individual

DR. William Dewayne Holmes, M.D.

Psychiatry & Neurology·Austin, TX· NPI 1639348246 · Enumerated 2008 · 18 years on NPI

Holmes is 1 of 407 psychiatry & neurology providers in Austin and 1 of 4391 in Texas.

NPI age

18 years

Enumerated 2008-02-27

Primary specialty

Psychiatry & Neurology

Plus 1 subspecialty

Licensed in

1 state

Status

Active

No deactivations on record

Last NPPES update

2013-10-11

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

18 years

↑ 2 yr above median (16 yr)

State licenses

1 state

12% of peers hold multiple states

Subspecialties

In the 34% of peers with subspecialties

NPI lifetime · 2008 → 2026

2008-02Enumerated in NPPES

2008 2026

Where they practice

Practice location

12515 Research Blvd, Bldg 8, Suite 400

Austin, TX 787592228

📞 2102412691

Mailing address

12515 Research Blvd, Bldg 8, Suite 400

Austin, TX 787592228

📞 2102412691

Specialties

Allopathic & Osteopathic Physicians › Psychiatry & Neurology

Psychiatry & Neurology Primary

A 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...

TX license #H4418 taxonomy 2084P0800X
Psychiatry & Neurology

Child & Adolescent Psychiatry is a subspecialty of psychiatry with additional skills and training in the diagnosis and treatment of developmental, behavioral, emotional, and mental disorders of childhood and adolescence.

TX license #H4418 taxonomy 2084P0804X

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: 9 new psychiatry & neurology providers have been added in Austin in the last 180 days. See all →

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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.