DR. SARA ACKER LEO PSY.D
NPI 1831213313
Psychologist in Concord, MA

Active since March 19, 2007Opted out of Medicare · through Jul 27, 2027
45 WALDEN ST, CONCORD, MA 01742(617) 444-9198 Get Directions Write a Review

NPPES record last updated: January 2, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jan 2, 2026, Jan 10, 2019 (2 updates tracked since 2019).

About Dr. Sara Acker Leo Psy.d NPPES

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

DR. SARA ACKER LEO PSY.D (NPI 1831213313) is an individual psychologist in Concord, Massachusetts, licensed in Massachusetts (9040) and active in the NPI registry since March 2007. She has opted out of Medicare through July 27, 2027.

NPPES Registry Identity

NPI1831213313
Entity TypeIndividualFemale
Primary Taxonomy103T00000X
Provider Legal NameDR. SARA ACKER LEOCredential: PSY.D
Location Address45 WALDEN STConcord, MA 01742-2533
Mailing Address45 Walden StConcord, MA 01742-2533 · (617) 444-9198
Sole ProprietorYes
Enumeration DateMarch 19, 2007
Last NPPES UpdateJanuary 2, 20262 updates tracked since enumeration
NPPES CertifiedJanuary 2, 2026
NPI 1831213313 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 4

Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
License Licensed in MA · 9040
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.
Also ListedPsychologist · Cognitive & BehavioralTaxonomy 103TB0200X
Also ListedPsychologist · ClinicalTaxonomy 103TC0700X · License 9040 (MA)
Also ListedPsychologist · HealthTaxonomy 103TH0004X
45 WALDEN ST, Concord, MA 01742

Other Names 1

Former Name (1)Dr. Sara Mays Acker Psy.d

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Opted out of Medicare

Dr. Sara Acker Leo Psy.d has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from July 27, 2023 through July 27, 2027.

Opt-Out Effective DateJuly 27, 2023
Opt-Out In Effect ThroughJuly 27, 2027Opt-out affidavits renew automatically every two years unless cancelled

Other Providers at the Same Location NPPES 2

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

Psychologist
45 WALDEN ST
CONCORD, MA 01742
Social Worker (Clinical)
45 WALDEN ST
CONCORD, MA 01742

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 Sara Leo's NPI number?

The NPI number for Sara Leo is 1831213313. It was assigned to this individual provider in the NPPES registry on March 19, 2007. The provider is also known as Dr. Sara Mays Acker Psy.D.

Where is Sara Leo located?

Sara Leo practices at 45 Walden St, Concord, MA 01742. The listed phone number is (617) 444-9198.

What is Sara Leo's specialty?

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

Is Sara Leo enrolled in Medicare?

No. Sara Leo has opted out of Medicare through July 27, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out.

When was this NPI record last updated?

The NPPES record for Sara Leo was last updated on January 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.