NPI age
8 years
Enumerated 2017-09-25
● Active
Type 1 · Individual
DR. Harriet Singelyn, PSYD
Singelyn is 1 of 6 psychologist providers in Keller and 1 of 2632 in Texas.
Primary specialty
Psychologist
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2025-11-24
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 2632 active psychologist providers in Texas.
NPI age
8 years
↓ 5 yr below median (13 yr)
State licenses
1 state
4% of peers hold multiple states
Subspecialties
0
24% of peers hold subspecialties
NPI lifetime · 2017 → 2026
2017-09Enumerated in NPPES
2017
2026
Where they practice
Practice location
1710 Keller Pkwy # 4759
Keller, TX 762483749
Mailing address
1710 Keller Pkwy # 4759
Keller, TX 762483749
Specialties
-
Psychologist PrimaryA psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, and modification of human behavior by the application of psychological principles,...
Practice context
Solo or small practice. No other active providers share this practice address in NPPES.
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