DR. GREGORY WEI CHIANG WOO M.D.
NPI 1093910788
Obstetrics & Gynecology in Brockton, MA
About Dr. Gregory Wei Chiang Woo M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. GREGORY WEI CHIANG WOO M.D. (NPI 1093910788) is an individual obstetrics & gynecology provider in Brockton, Massachusetts, licensed in Massachusetts (248062) and active in the NPI registry since June 2007. He is enrolled in Medicare PECOS and is a graduate of University Of Massachusetts Medical School (2007).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Gregory Wei Chiang Woo M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
4Medicare enrollment records show Gregory Woo reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Brockton, MA 02302
- Reassigned Medicare billing, Massachusetts enrollment
- Medicare enrollment name: Obhg Massachusetts - Direct PC
- 100 clinicians in this Medicare group
Brockton, MA 02302
- Reassigned Medicare billing, Massachusetts enrollment
- 81 clinicians in this Medicare group
Brockton, MA 02301
- Reassigned Medicare billing, Massachusetts enrollment
- 128 clinicians in this Medicare group
Brockton, MA 02301
- Reassigned Medicare billing, Massachusetts enrollment
- 409 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02302 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BROCKTON, MA 02302
BROCKTON, MA 02302
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 Gregory Woo's NPI number?
The NPI number for Gregory Woo is 1093910788. It was assigned to this individual provider in the NPPES registry on June 20, 2007.
Where is Gregory Woo located?
Gregory Woo practices at 680 Centre St, Brockton, MA 02302. The listed phone number is (508) 941-7000.
What is Gregory Woo's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Gregory Woo enrolled in Medicare?
Yes. Gregory Woo is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Gregory Woo's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Woo reassigns Medicare benefits to 4 organizations: Obhg Massachusetts - Direct, P.C. (Brockton, MA), Brockton Hospital, Inc. (Brockton, MA), Brockton Neighborhood Health Center (Brockton, MA) and Signature Healthcare Medical Group Inc (Brockton, MA). Each 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 Gregory Woo's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Gregory Woo accept?
Health plans from Taro Health list Gregory Woo as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Gregory Woo was last updated on August 31, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Dr. Gregory Wei Chiang Woo, M.D. · NPI 1093910788
Obstetrics & Gynecology physician in Brockton, Massachusetts. Individual provider, active in the CMS NPPES registry since June 20, 2007.
## Identity
- **NPI:** 1093910788 (Entity type: Individual)
- **Enumerated:** June 20, 2007
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** 248062 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 680 CENTRE ST, Brockton, MA 02302-3308
- **Phone:** (508) 941-7000 · **Fax:** (508) 941-6480
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Obhg Massachusetts - Direct, P.C. (NPI 1487229035, Brockton, MA); Brockton Hospital, Inc. (NPI 1063431286, Brockton, MA); Brockton Neighborhood Health Center (NPI 1225085319, Brockton, MA); Signature Healthcare Medical Group Inc (NPI 1508804949, Brockton, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Massachusetts Medical School, class of 2007
## Record status
- **NPPES last updated:** August 31, 2015
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Source: [NPI Profile](https://npiprofile.com/npi/1093910788) · Data from the CMS NPPES public registry.