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ANN-MARIE WILLIAMS PA-C
NPI 1164549341
Physician Assistant - Surgical in Watertown, CT

Active since March 23, 2007PECOS EnrolledAccepts Medicare Assignment
100/100
CMS Quality Rating
595 STRAITS TPKE, WATERTOWN, CT 06795(844) 482-7285(203) 502-2615 Get Directions Write a Review

NPPES record last updated: March 11, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Mar 11, 2025, Mar 7, 2025, Aug 9, 2024 and 2 more (5 updates tracked since 2017).

About Ann-marie Williams Pa-c NPPES

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

ANN-MARIE WILLIAMS PA-C (NPI 1164549341) is an individual surgical provider in Watertown, Connecticut, licensed in Connecticut (002034) and active in the NPI registry since March 2007. She is enrolled in Medicare PECOS, maintains a secondary practice location in Bridgeport, and is a graduate of Other (2004).

NPPES Registry Identity

NPI1164549341
Entity TypeIndividualFemale
Primary Taxonomy363AS0400X
Provider Legal NameANN-MARIE WILLIAMSCredential: PA-C
Location Address595 STRAITS TPKEWatertown, CT 06795-3393
Mailing Address2800 Main StBridgeport, CT 06606-4292 · (203) 576-6000
Phone(844) 482-7285
Fax(203) 502-2615
Sole ProprietorYes
Medical School CMSOtherGraduated 2004
Enumeration DateMarch 23, 2007
Last NPPES UpdateMarch 11, 20255 updates tracked since enumeration
NPPES CertifiedMarch 11, 2025
✔ NPI 1164549341 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPhysician Assistant · SurgicalPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363AS0400X
License✔ Licensed in CT · 002034
Also ListedPhysician AssistantTaxonomy 363A00000X · License 2034 (CT)
595 STRAITS TPKE, Watertown, CT 06795
Open in Google Maps ↗

Secondary Practice Location 1

Location 12800 Main StBridgeport, CT 06606-4292 · Phone (203) 576-6000

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Ann-marie Williams Pa-c is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1850479080
PECOS Enrollment IDI20080429000093
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 Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

100/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Promoting Interoperability92
Improvement Activities40

Other Providers at the Same Location NPPES

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

MR. SPENCER EMERSON DEROS PA-C
Physician Assistant (Surgical)
595 STRAITS TPKE
WATERTOWN, CT 06795
Naugatuck Valley Planning Region (844) 482-7285

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 Ann-marie Williams's NPI number?

The NPI number for Ann-marie Williams is 1164549341. It was assigned to this individual provider in the NPPES registry on March 23, 2007.

Where is Ann-marie Williams located?

Ann-marie Williams practices at 595 Straits Tpke, Watertown, CT 06795. The listed phone number is (844) 482-7285.

What is Ann-marie Williams's specialty?

The primary specialty registered for this NPI is Physician Assistant, specializing in Surgical, with taxonomy code 363AS0400X.

Is Ann-marie Williams enrolled in Medicare?

Yes. Ann-marie Williams is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Ann-marie Williams was last updated on March 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.