Charles A. Birbara, M.D.
NPI 1659422699 · Rheumatology Physician · Worcester, MA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Charles A. Birbara, M.D. is a Rheumatology Physician organization in Worcester, MA (NPI 1659422699).
Provider details
- NPI number
- 1659422699
- Entity type
- Organization
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Charles Birbara, M.D.(508) 799-2674
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-16
- Last updated
- 2012-06-08
Frequently asked questions
- What is Charles A. Birbara, M.D.'s NPI number?
- Charles A. Birbara, M.D.'s National Provider Identifier (NPI) is 1659422699, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Charles A. Birbara, M.D.?
- Charles A. Birbara, M.D. is classified in the NPPES registry as Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Charles A. Birbara, M.D. located?
- Charles A. Birbara, M.D.'s practice location on file with NPPES is 25 Oak Ave, Worcester, MA 01605-2751.
- What is Charles A. Birbara, M.D.'s phone number?
- The practice phone number listed in the NPPES registry for Charles A. Birbara, M.D. is (508) 799-2674.
- Does Charles A. Birbara, M.D. accept Medicare?
- Charles A. Birbara, M.D. is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Charles A. Birbara, M.D.?
- The authorized official listed on Charles A. Birbara, M.D.'s NPPES record is Charles Birbara, M.D.. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Charles A. Birbara, M.D.'s NPI active?
- Yes — Charles A. Birbara, M.D.'s NPI (1659422699) is active in the NPPES registry as of the last update on 2012-06-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.