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

MARTHA JANE WILLIAMS PMHNP-BC
NPI 1215801592
Nurse Practitioner - Psychiatric/Mental Health in New Haven, CT

Active since October 01, 2025
184 LIBERTY ST, NEW HAVEN, CT 06519(203) 688-9704 Get Directions Write a Review

NPPES record last updated: October 2, 2026. Verified against the NPPES registry weekly; last sync: October 11, 2026.

About Martha Jane Williams Pmhnp-bc NPPES

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

MARTHA JANE WILLIAMS PMHNP-BC (NPI 1215801592) is an individual psychiatric/mental health provider in New Haven, Connecticut, licensed in Connecticut (17912) and active in the NPI registry since October 2025.

NPPES Registry Identity

NPI1215801592
Entity TypeIndividualFemale
Primary Taxonomy363LP0808X
Provider Legal NameMARTHA JANE WILLIAMSCredential: PMHNP-BC
Location Address184 LIBERTY STNew Haven, CT 06519-1625
Mailing Address184 Liberty StNew Haven, CT 06519-1625
Phone(203) 688-9704
Sole ProprietorNo
Enumeration DateOctober 1, 2025
Last NPPES UpdateOctober 2, 2026
NPPES CertifiedOctober 2, 2026
✔ NPI 1215801592 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · Psychiatric/Mental HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LP0808X
License✔ Licensed in CT · 17912
184 LIBERTY ST, New Haven, CT 06519
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Other Names 1

Other Name (5)Mj Williams Pmhnp-bc

Other Providers at the Same Location NPPES 20

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

DIANE K VIVEIROS MSW (LCSW/LICSW)
Social Worker (Clinical)
184 LIBERTY ST, LV110
NEW HAVEN, CT 06519
South Central Connecticut Planning Region (203) 688-9926
DR. KATHARINE CIOE MD
Psychiatry & Neurology (Psychiatry)
184 LIBERTY ST
NEW HAVEN, CT 06519
South Central Connecticut Planning Region (203) 688-9704
ALEXA L CAROLAN
Nurse Practitioner (Family)
184 LIBERTY ST
NEW HAVEN, CT 06519
South Central Connecticut Planning Region (203) 688-9704
DR. BELLANIRYS ACOSTA ARIAS MD
Psychiatry & Neurology (Psychiatry)
184 LIBERTY ST
NEW HAVEN, CT 06519
South Central Connecticut Planning Region (203) 688-9704
YALE NEW HAVEN HOSPITAL
General Acute Care Hospital
184 LIBERTY ST
NEW HAVEN, CT 06519
South Central Connecticut Planning Region (203) 688-9909
RACHEL ANN HART PA-C
Physician Assistant (Medical)
184 LIBERTY ST
NEW HAVEN, CT 06519
South Central Connecticut Planning Region (203) 688-9907
MARK SERVIDIO OTR/L
Occupational Therapist
184 LIBERTY ST
NEW HAVEN, CT 06519
South Central Connecticut Planning Region (203) 688-4242
MATTHEW N. GOLDENBERG M.D.
Psychiatry & Neurology (Psychiatry)
184 LIBERTY ST
NEW HAVEN, CT 06519
South Central Connecticut Planning Region (203) 200-2520

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 Martha Williams's NPI number?

The NPI number for Martha Williams is 1215801592. It was assigned to this individual provider in the NPPES registry on October 1, 2025. The provider is also known as Mj Williams Pmhnp-Bc.

Where is Martha Williams located?

Martha Williams practices at 184 Liberty St, New Haven, CT 06519. The listed phone number is (203) 688-9704.

What is Martha Williams's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.

When was this NPI record last updated?

The NPPES record for Martha Williams was last updated on October 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.