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CHARLES A. BIRBARA, M.D.
NPI 1659422699
Internal Medicine - Rheumatology in Worcester, MA

Active since January 16, 2007
25 OAK AVE, WORCESTER, MA 01605(508) 799-2674(508) 799-2586 Get Directions Write a Review

NPPES record last updated: June 8, 2012. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Charles A. Birbara, M.d. NPPES

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

CHARLES A. BIRBARA, M.D. (NPI 1659422699) is a healthcare organization registered as a rheumatology in Worcester, Massachusetts and active in the NPI registry since January 2007. The organization lists Charles Allen Birbara, M.d., as its authorized official.

NPPES Registry Identity

NPI1659422699
Entity TypeOrganization
Primary Taxonomy207RR0500X
Legal Business NameCHARLES A. BIRBARA, M.D.
Location Address25 OAK AVEWorcester, MA 01605-2751
Mailing Address25 Oak AveWorcester, MA 01605-2751 · (508) 799-2674 · Fax (508) 799-2586
Phone(508) 799-2674
Fax(508) 799-2586
Organization SubpartNo
Authorized OfficialCharles Allen BirbaraM.d. · (508) 799-2674
Enumeration DateJanuary 16, 2007
Last NPPES UpdateJune 8, 2012
✔ NPI 1659422699 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · RheumatologyAllopathic & Osteopathic Physicians
Taxonomy Code207RR0500X
Definition
An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and collagen diseases.
25 OAK AVE, Worcester, MA 01605
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Other Identifiers 2

Medicare PINM11203MA
Medicare UPINA67226MA

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)

Charles A. Birbara, M.d. 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 Charles A. Birbara, M.D., which bills Medicare for the services this clinician delivers.

Clinician (1)

Charles Birbara, M.D.
Rheumatology
NPI 1093705410
25 OAK AVE
Worcester, MA 01605
(508) 799-2674
✔ 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 Charles A. Birbara, M.D.'s NPI number?

The NPI number for Charles A. Birbara, M.D. is 1659422699. It was assigned to this organization in the NPPES registry on January 16, 2007.

Where is Charles A. Birbara, M.D. located?

Charles A. Birbara, M.D. is located at 25 Oak Ave, Worcester, MA 01605. The listed phone number is (508) 799-2674.

What is Charles A. Birbara, M.D.'s specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.

Is Charles A. Birbara, M.D. enrolled in Medicare?

Yes. Charles A. Birbara, M.D. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Charles A. Birbara, M.D.?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Rheumatology) reassigns their Medicare billing to Charles A. Birbara, M.D.. 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 Charles A. Birbara, M.D. was last updated on June 8, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.