WILLIAM F. FLYNN JR. MD PC
NPI 1023209186
Surgery in Arlington, MA

Q: What is William F. Flynn Jr. MD PC's NPI number?

The NPI number for William F. Flynn Jr. MD PC is 1023209186. It was assigned to this organization in the NPPES registry on August 5, 2007.

Q: What is William F. Flynn Jr. MD PC's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Active since August 05, 2007

22 MILL ST, # 301, ARLINGTON, MA 02476(781) 643-6313(781) 643-6316 Get Directions Write a Review

NPPES record last updated: August 5, 2007. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About William F. Flynn Jr. Md Pc NPPES

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

WILLIAM F. FLYNN JR. MD PC (NPI 1023209186) is a healthcare organization registered as a surgery in Arlington, Massachusetts and active in the NPI registry since August 2007. The organization lists William F Flynn, President, as its authorized official.

NPPES Registry Identity

NPI1023209186

Entity TypeOrganization

Primary Taxonomy208600000X

Legal Business NameWILLIAM F. FLYNN JR. MD PC

Location Address22 MILL ST, # 301Arlington, MA 02476-4784

Mailing Address22 Mill St, # 301Arlington, MA 02476-4784 · (781) 643-6313 · Fax (781) 643-6316

Phone(781) 643-6313

Fax(781) 643-6316

Organization SubpartNo

Authorized OfficialWilliam F FlynnPresident · (781) 643-6313

Enumeration DateAugust 5, 2007

✔ NPI 1023209186 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians

Taxonomy Code208600000X

License✔ Licensed in MA · 32293

Definition

A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

22 MILL ST, Arlington, MA 02476

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Other Identifiers 8

OtherM13029MA · Bcbs

Medicaid9721851MA

Other8477MA · Harvard Pilgrim

Medicare UPINB73245

Other032293Tufts

Other17-00465MA · United Healthcare

Medicaid0141291MA

Medicare PINM13029MA

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 and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William F. Flynn Jr. Md Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to William F. Flynn Jr. MD PC, which bills Medicare for the services this clinician delivers.

Clinician (1)

William Flynn, M.D.

General Surgery

NPI 1952330268

22 MILL ST SUITE 301
Arlington, MA 02476

(781) 643-6313

✔ PECOS✔ Accepts MedicareSame address

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 William F. Flynn Jr. MD PC's NPI number?

The NPI number for William F. Flynn Jr. MD PC is 1023209186. It was assigned to this organization in the NPPES registry on August 5, 2007.

Where is William F. Flynn Jr. MD PC located?

William F. Flynn Jr. MD PC is located at 22 Mill St # 301, Arlington, MA 02476. The listed phone number is (781) 643-6313.

What is William F. Flynn Jr. MD PC's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is William F. Flynn Jr. MD PC enrolled in Medicare?

Yes. William F. Flynn Jr. MD PC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through William F. Flynn Jr. MD PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (General Surgery) reassigns their Medicare billing to William F. Flynn Jr. MD PC. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for William F. Flynn Jr. MD PC was last updated on August 5, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years 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.