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

MRS. KAREN P MCKAY PA
NPI 1396736765
Physician Assistant in Marshfield, MA

Q: What is Karen Mckay's NPI number?

The NPI number for Karen Mckay is 1396736765. It was assigned to this individual provider in the NPPES registry on November 3, 2005.

Q: What is Karen Mckay's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Karen Mckay was last updated on August 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.

Active since November 03, 2005PECOS Enrolled

435 FURNACE ST, MARSHFIELD, MA 02050(781) 837-7200(781) 837-7255 Get Directions Write a Review

NPPES record last updated: August 5, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Aug 5, 2026, Jun 2, 2026 (2 updates tracked since 2026).

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About Mrs. Karen P Mckay Pa NPPES

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

MRS. KAREN P MCKAY PA (NPI 1396736765) is an individual physician assistant in Marshfield, Massachusetts, licensed in Massachusetts (177) and active in the NPI registry since November 2005. She is enrolled in Medicare PECOS and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1396736765

Entity TypeIndividualFemale

Primary Taxonomy363A00000X

Provider Legal NameMRS. KAREN P MCKAYCredential: PA

Location Address435 FURNACE STMarshfield, MA 02050-2332

Mailing Address302 Weymouth St Ste 202Rockland, MA 02370-1172 · (781) 803-2786 · Fax (781) 812-1631

Phone(781) 837-7200

Fax(781) 837-7255

Sole ProprietorNo

Enumeration DateNovember 3, 2005

Last NPPES UpdateAugust 5, 20262 updates tracked since enumeration

NPPES CertifiedAugust 5, 2026

✔ NPI 1396736765 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363A00000X

License✔ Licensed in MA · 177

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.

435 FURNACE ST, Marshfield, MA 02050

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Secondary Practice Locations 2

Location 1484 Route 134South Dennis, MA 02660-3423 · Phone (508) 694-7901

Location 2500 Lincoln StWorcester, MA 01605-1916 · Phone (774) 420-2111

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)

Mrs. Karen P Mckay Pa 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02050 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

$90.70 typical visit price

range $58.86 – $177.36

Typical copayment $22.67 (range $14.71 – $44.34)

Most-billed visit code 99203

Established Patient

$73.22 typical visit price

range $19.11 – $144.84

Typical copayment $18.30 (range $4.77 – $36.21)

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 9

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

DR. THARWAT A HANNA MD

Internal Medicine