DR. STEPHEN LARSON PSY D
NPI 1649230160
Psychologist in Saugerties, NY

Active since March 27, 2006PECOS Enrolled
352 HOMMELVILLE RD, SAUGERTIES, NY 12477(951) 285-3306 Get Directions Write a Review

NPPES record last updated: January 7, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Stephen Larson Psy D NPPES

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

DR. STEPHEN LARSON PSY D (NPI 1649230160) is an individual psychologist in Saugerties, New York, licensed in New York (018768-1) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1649230160
Entity TypeIndividualMale
Primary Taxonomy103T00000X
Provider Legal NameDR. STEPHEN LARSONCredential: PSY D
Location Address352 HOMMELVILLE RDSaugerties, NY 12477-4205
Mailing Address352 Hommelville RdSaugerties, NY 12477-4205 · (845) 633-1146
Sole ProprietorNo
Enumeration DateMarch 27, 2006
Last NPPES UpdateJanuary 7, 2026
NPPES CertifiedJanuary 7, 2026
✔ NPI 1649230160 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
Licenses✔ Licensed in NY · 018768-1✔ Licensed in ME · TP1267✔ Licensed in ME · PS1267
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.
352 HOMMELVILLE RD, Saugerties, NY 12477

Other Identifiers 1

Medicaid433395199ME

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Stephen Larson Psy D is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Stephen Larson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Family Medicine
1 CALIFORNIA ST STE 2300
San Francisco, CA 94111
  • Reassigned Medicare billing, New York enrollment
  • 12 clinicians in this Medicare group

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Stephen Larson's NPI number?

The NPI number for Stephen Larson is 1649230160. It was assigned to this individual provider in the NPPES registry on March 27, 2006.

Where is Stephen Larson located?

Stephen Larson practices at 352 Hommelville Rd, Saugerties, NY 12477. The listed phone number is (951) 285-3306.

What is Stephen Larson's specialty?

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

Is Stephen Larson enrolled in Medicare?

Yes. Stephen Larson is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Stephen Larson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Stephen Larson reassigns Medicare benefits to Doctor On Demand Professionals P C (San Francisco, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Stephen Larson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Stephen Larson accept?

Health plans from Anthem Blue Cross and Blue Shield and Harvard Pilgrim Health Care list Stephen Larson as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Stephen Larson was last updated on January 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months 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.