NPI age
3 years
Enumerated 2022-06-13
● Active
Type 1 · Individual
DR. Gregory Muller, PH.D.
Muller is 1 of 359 psychologist providers in Austin and 1 of 3401 in Texas.
Primary specialty
Psychologist
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2023-01-20
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 3401 active psychologist providers in Texas.
NPI age
3 years
↓ 12 yr below median (15 yr)
State licenses
1 state
7% of peers hold multiple states
Subspecialties
0
26% of peers hold subspecialties
NPI lifetime · 2022 → 2026
2022-06Enumerated in NPPES
2022
2026
Where they practice
Practice location
1601 Trinity St, Building B, Stop Z0600
Austin, TX 787121765
Mailing address
1601 Trinity St
Austin, TX 787121765
Specialties
-
Psychologist PrimaryA psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a...
Practice context
Solo or small practice. No other active providers share this practice address in NPPES.
Recently enumerated nearby: 10 new psychologist providers have been added in Austin in the last 180 days.
See all →
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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.