COMMONWEALTH OB-GYN, PC
NPI 1912082694
Specialist in Brookline, MA
About Commonwealth Ob-gyn, Pc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
COMMONWEALTH OB-GYN, PC (NPI 1912082694) is a healthcare organization registered as a specialist in Brookline, Massachusetts and active in the NPI registry since October 2006. The organization holds a CLIA Waiver certificate valid through September 20, 2028 and lists Derna Demaggio, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Commonwealth Ob-gyn, Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
10Medicare enrollment records show 10 clinicians reassign Medicare billing to Commonwealth Ob-Gyn, PC, which bills Medicare for the services they deliver. Of these, 3 practice at this address and 8 within 10 miles. They are listed nearest first.
Clinicians by Medicare Specialty 2
Clinicians, nearest first (10)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
CLIA Laboratory Certificates CMS CLIA
Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.
Certificate of Waiver 22D1030927
Commonwealth Obgyn, PC · Brookline, MAFrequently 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 Commonwealth Ob-Gyn, PC's NPI number?
The NPI number for Commonwealth Ob-Gyn, PC is 1912082694. It was assigned to this organization in the NPPES registry on October 25, 2006.
Where is Commonwealth Ob-Gyn, PC located?
Commonwealth Ob-Gyn, PC is located at 1 Brookline Pl Suite 305, Brookline, MA 02445. The listed phone number is (617) 732-1510.
What is Commonwealth Ob-Gyn, PC's specialty?
The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.
Is Commonwealth Ob-Gyn, PC enrolled in Medicare?
Yes. Commonwealth Ob-Gyn, PC is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Commonwealth Ob-Gyn, PC?
According to the CMS Revalidation Reassignment List (October 2026 release), 10 clinicians in 2 Medicare specialties reassign their Medicare billing to Commonwealth Ob-Gyn, 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. The largest specialties are Obstetrics/Gynecology (8) and Nurse Practitioner (2). Of these, 3 practice at this address and 8 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Commonwealth Ob-Gyn, PC hold a CLIA laboratory certificate?
Yes. A Certificate of Waiver (number 22D1030927) is associated with this NPI, valid through September 20, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
When was this NPI record last updated?
The NPPES record for Commonwealth Ob-Gyn, PC was last updated on October 1, 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.
# Commonwealth Ob-Gyn, Pc · NPI 1912082694
Specialist organization in Brookline, Massachusetts. Organization record, active in the CMS NPPES registry since October 25, 2006.
## Identity
- **NPI:** 1912082694 (Entity type: Organization)
- **Enumerated:** October 25, 2006
- **Primary specialty:** Specialist · taxonomy 174400000X
- **Organization subpart:** No
- **Authorized official:** Derna Demaggio, PRESIDENT
## Practice location
- **Address:** 1 BROOKLINE PL, SUITE 305, Brookline, MA 02445-7224
- **Phone:** (617) 732-1510 · **Fax:** (617) 732-0986
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 10 clinicians in 2 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Obstetrics/Gynecology (8), Nurse Practitioner (2); 3 practice at this address and 8 within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** October 1, 2007
- **CLIA laboratory certificates:** 1 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1912082694) · Data from the CMS NPPES public registry.