GREGORY A CHAMBERS MD
NPI 1972546406
Surgery in Los Angeles, CA
About Gregory A Chambers Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GREGORY A CHAMBERS MD (NPI 1972546406) is an individual surgery provider in Los Angeles, California, licensed in California (A62663) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS and is a graduate of University Of Kansas School Of Med (kc/wich/sal) (1995).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
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
Gregory A Chambers Md 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
2Medicare enrollment records show Gregory Chambers reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Los Angeles, CA 90037
- Reassigned Medicare billing, California enrollment
Sacramento, CA 95816
- Reassigned Medicare billing, California enrollment
- 266 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.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 90037 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Chambers's NPI number?
The NPI number for Gregory Chambers is 1972546406. It was assigned to this individual provider in the NPPES registry on June 13, 2006.
Where is Gregory Chambers located?
Gregory Chambers practices at 231 W Vernon Ave Ste 202, Los Angeles, CA 90037. The listed phone number is (323) 238-7192.
What is Gregory Chambers's specialty?
The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.
Is Gregory Chambers enrolled in Medicare?
Yes. Gregory Chambers 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 Chambers's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Chambers reassigns Medicare benefits to 2 organizations: Gregory Chambers M D A Medical Corporation (Los Angeles, CA) and Acute Care Surgery Medical Group, Inc. (Sacramento, CA). 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 Chambers's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Gregory Chambers was last updated on November 1, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Gregory A Chambers, MD · NPI 1972546406
Surgery physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since June 13, 2006.
## Identity
- **NPI:** 1972546406 (Entity type: Individual)
- **Enumerated:** June 13, 2006
- **Primary specialty:** Surgery · taxonomy 208600000X
- **State license:** A62663 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 231 W VERNON AVE STE 202, Los Angeles, CA 90037-2779
- **Phone:** (323) 238-7192 · **Fax:** (323) 432-2035
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Gregory Chambers M D A Medical Corporation (NPI 1366643918, Los Angeles, CA); Acute Care Surgery Medical Group, Inc. (NPI 1700069549, Sacramento, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Kansas School Of Med, class of 1995
## Record status
- **NPPES last updated:** November 1, 2017
- **Other identifiers:** Medicare UPIN G94747 (CA); Medicare PIN WA62663B (CA); Medicaid 00A626630 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1972546406) · Data from the CMS NPPES public registry.