Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. HARRIET SINGELYN PSYD
NPI 1639688476
Psychologist in San Antonio, TX

Active since September 25, 2017
17890 BLANCO RD STE 307, SAN ANTONIO, TX 78232(210) 201-2364(210) 756-8239 Get Directions Write a Review

NPPES record last updated: October 14, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Oct 14, 2026, Nov 24, 2025, May 24, 2022 (3 updates tracked since 2022).

About Dr. Harriet Singelyn Psyd NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. HARRIET SINGELYN PSYD (NPI 1639688476) is an individual psychologist in San Antonio, Texas, licensed in Texas (39356) and active in the NPI registry since September 2017.

NPPES Registry Identity

NPI1639688476
Entity TypeIndividualFemale
Primary Taxonomy103T00000X
Provider Legal NameDR. HARRIET SINGELYNCredential: PSYD
Location Address17890 BLANCO RD STE 307San Antonio, TX 78232-1098
Mailing Address17890 Blanco Rd Ste 307San Antonio, TX 78232-1098 · (210) 201-2364 · Fax (210) 756-8239
Fax(210) 756-8239
Sole ProprietorNo
Enumeration DateSeptember 25, 2017
Last NPPES UpdateOctober 14, 20263 updates tracked since enumeration
NPPES CertifiedOctober 14, 2026
✔ NPI 1639688476 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
License✔ Licensed in TX · 39356
Definition
A 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, methods, and procedures, for the purpose of preventing or eliminating symptomatic, maladaptive, or undesired behavior and of enhancing interpersonal relationships, work and life adjustment, personal effectiveness, behavioral health, and mental health. The practice of psychology includes, but is not limited to, psychological testing and the evaluation or assessment of personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning; counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy; diagnosis and treatment of mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability; and psycheducational evaluation, therapy, remediation, and consultation. Psychological services may be rendered to individuals, families, groups and the public.
17890 BLANCO RD STE 307, San Antonio, TX 78232

Other Names 1

Former Name (1)Dr. Harriet Stares Psyd

Other Providers at the Same Location NPPES 13

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Counselor (Professional)
17890 BLANCO RD STE 307
SAN ANTONIO, TX 78232
Counselor (Addiction (Substance Use Disorder))
17890 BLANCO RD STE 307
SAN ANTONIO, TX 78232
Counselor (Mental Health)
17890 BLANCO RD STE 307
SAN ANTONIO, TX 78232
Psychologist
17890 BLANCO RD STE 307
SAN ANTONIO, TX 78232
Social Worker
17890 BLANCO RD STE 307
SAN ANTONIO, TX 78232
Counselor (Professional)
17890 BLANCO RD STE 307
SAN ANTONIO, TX 78232
Clinic/Center (Hearing and Speech)
17890 BLANCO RD STE 307
SAN ANTONIO, TX 78232
Counselor (Mental Health)
17890 BLANCO RD STE 307
SAN ANTONIO, TX 78232

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Harriet Singelyn's NPI number?

The NPI number for Harriet Singelyn is 1639688476. It was assigned to this individual provider in the NPPES registry on September 25, 2017. The provider is also known as Dr. Harriet Stares Psyd.

Where is Harriet Singelyn located?

Harriet Singelyn practices at 17890 Blanco Rd Ste 307, San Antonio, TX 78232. The listed phone number is (210) 201-2364.

What is Harriet Singelyn's specialty?

The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.

When was this NPI record last updated?

The NPPES record for Harriet Singelyn was last updated on October 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.