NPI age
4 years
Enumerated 2021-07-19
● Active
Type 1 · Individual
Allison Lynne Hamff, PHD
Hamff is 1 of 43 psychologist providers in Houston and 1 of 224 in Texas.
Primary specialty
Psychologist
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2021-07-19
Source: monthly bulk 2026-05
Sole proprietor
Yes
Solo practice on file
How this provider compares
Across 224 active psychologist providers in Texas.
NPI age
4 years
↓ 7 yr below median (11 yr)
State licenses
1 state
3% of peers hold multiple states
Subspecialties
0
37% of peers hold subspecialties
NPI lifetime · 2021 → 2026
2021-07Enumerated in NPPES
2021
2026
Where they practice
Practice location
3000 Weslayan St Ste 140
Houston, TX 770275700
Mailing address
4426 Spellman Rd
Houston, TX 770356020
Specialties
-
Psychologist PrimaryA psychologist who develops and applies scientific knowledge to the delivery of psychological services to infants, toddlers, children and adolescents within their social context. Of particular importance to the specialty of clinical...
Practice context
Part of a multi-provider practice. 7 other active providers share this practice address in NPPES.
Recently enumerated nearby: 1 new psychologist provider has 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.