KATHERINE WILLIAMS PA-C
NPI 1922795699
Physician Assistant in Boston, MA

Q: What is Katherine Williams's NPI number?

The NPI number for Katherine Williams is 1922795699. It was assigned to this individual provider in the NPPES registry on April 21, 2023. The provider is also known as Katherine Taylor Williams.

Q: What is Katherine Williams's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Active since April 21, 2023PECOS Enrolled

725 ALBANY ST, STE 3B, SHAPIRO BLDG, BOSTON, MA 02118(617) 638-8485(617) 414-7372 Get Directions Write a Review

NPPES record last updated: May 9, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: May 9, 2026, May 15, 2024, May 10, 2023 (3 updates tracked since 2023).

On this page

About Katherine Williams Pa-c NPPES

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

KATHERINE WILLIAMS PA-C (NPI 1922795699) is an individual physician assistant in Boston, Massachusetts, licensed in Massachusetts (PA9258) and active in the NPI registry since April 2023. She is enrolled in Medicare PECOS, is affiliated with Boston Medical Center, and is a graduate of Other (2022).

NPPES Registry Identity

NPI1922795699

Entity TypeIndividualFemale

Primary Taxonomy363A00000X

Provider Legal NameKATHERINE WILLIAMSCredential: PA-C

Location Address725 ALBANY ST, STE 3B, SHAPIRO BLDGBoston, MA 02118-3549

Mailing Address960 Massachusetts Avenue, Fl 2Boston, MA 02118-2690

Phone(617) 638-8485

Fax(617) 414-7372

Sole ProprietorNo

Medical School CMSOtherGraduated 2022

Enumeration DateApril 21, 2023

Last NPPES UpdateMay 9, 20263 updates tracked since enumeration

NPPES CertifiedMay 9, 2026

✔ NPI 1922795699 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363A00000X

Licenses✔ Licensed in MA · PA9258✔ Licensed in NY · 035816

Definition

A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.

Also ListedPhysician Assistant · MedicalTaxonomy 363AM0700X · License 9258 (MA)

Also ListedPhysician Assistant · SurgicalTaxonomy 363AS0400X · License 9258 (MA)

725 ALBANY ST, STE 3B, Boston, MA 02118

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Other Names 1

Other Name (5)Katherine Taylor Williams

Other Identifiers 2

Medicaid110199336AMA

Medicaid3141060NH

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Katherine Williams Pa-c is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID4587021803

PECOS Enrollment IDI20260609000328

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.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

109 services82 patients

Electronic assessment of bladder emptying 51741

Electronic assessment of bladder emptying is a non-invasive test that measures how well your bladder functions. It uses ultrasound technology to create images of your bladder before and after you use the restroom, helping to identify any issues with bladder emptying.

27 services27 patients

Limited ultrasound scan of pelvis 76857

A limited ultrasound scan of the pelvis is a non-invasive imaging test. It uses high-frequency sound waves to create pictures of the lower abdomen area. This helps doctors view and assess the health of certain internal structures. It's painless and usually takes about 30 minutes.

22 services21 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

21 services21 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Boston Medical Center

Acute Care Hospitals · Boston, MA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220031

Location1 Boston Medical Center PlaceBoston, MA 02118 · Suffolk County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02118 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$97.64 typical visit price

range $63.72 – $189.86

Typical copayment $24.41 (range $15.93 – $47.46)

Most-billed visit code 99203

Established Patient

$78.84 typical visit price

range $21.07 – $155.29

Typical copayment $19.71 (range $5.26 – $38.82)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 3

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

CECILIA LIU PA-C

Physician Assistant

725 ALBANY ST, STE 3B, SHAPIRO BLDG, UROLOGY
BOSTON, MA 02118

Suffolk County (617) 638-8485

DAVID S. WANG MD

Urology

725 ALBANY ST, STE 3B, SHAPIRO BLDG
BOSTON, MA 02118

Suffolk County (617) 638-8485

VICTORIA B. CHURCHILL PA-C

Physician Assistant

725 ALBANY ST, STE 3B, SHAPIRO BLDG
BOSTON, MA 02118

Suffolk County (617) 638-8485

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 Katherine Williams's NPI number?

The NPI number for Katherine Williams is 1922795699. It was assigned to this individual provider in the NPPES registry on April 21, 2023. The provider is also known as Katherine Taylor Williams.

Where is Katherine Williams located?

Katherine Williams practices at 725 Albany St, Ste 3B Shapiro Bldg, Boston, MA 02118. The listed phone number is (617) 638-8485.

What is Katherine Williams's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Is Katherine Williams enrolled in Medicare?

Yes. Katherine Williams is registered in the Medicare PECOS enrollment system.

What insurance does Katherine Williams accept?

Health plans from Anthem Blue Cross and Blue Shield list Katherine Williams 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.

Is Katherine Williams affiliated with any hospitals?

According to CMS data, Katherine Williams is affiliated with Boston Medical Center.

When was this NPI record last updated?

The NPPES record for Katherine Williams was last updated on May 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.