Gregory A. Chambers, MD
Surgery Physician · Los Angeles, CA
Gregory A. Chambers, MD is a surgery physician with a practice address in Los Angeles, California, and NPI 1972546406, issued on Jun 13, 2006. Check the license (California A62663, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregory A. Chambers
- Credential
- MD
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- A62663 CA
Self-reported in NPPES; status is on the state search - Practice location
- 231 W Vernon Ave Ste 202, Los Angeles, CA 90037
- Phone
- (323) 238-7192
- Enumerated
- Jun 13, 2006
- Record last updated
- Nov 1, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (323) 432-2035
- Medicaid ID
- 00A626630 CA
- Medicare enrollment
- Enrolled (PECOS I20050215001098); accepts Medicare assignment
- Medical or professional school
- University Of Kansas School Of Med (Kc/Wich/Sal), 1995
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 3,118 in California → Look up another NPI →
Verify Gregory A. Chambers in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A62663Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average surgery physician in 2024
15 Medicare Part D claims, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 87.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $5,387.95
23 payments; by number, the most common kind was food and beverage; the largest payer was Intuitive Surgical, Inc. The 17,103 providers of this specialty with any payment received $3,513.80 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Acute Care Surgery Medical Group IncThousand Oaks, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory A. Chambers among 3,118 surgery physician records in California
Gregory A. Chambers, MD is one of 3,118 surgery physician records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1995 · median 2003 among the 1,901 with a school on file
- Record last updated2017 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208600000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in California
There are 3,118 surgery physician records in California.
All 3,118 in California → Every provider in Los Angeles → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Pouya Benyamini, M.D.Los Angeles, CA 900361457644296
- Stewart Gleischman, MDLa, CA 900361225032774
- William Rassman, M.D.Los Angeles, CA 900361598931313
- David Ditsworth, M.D.Los Angeles, CA 900351376685420
- Joseph Kamelgard, MD, FACSLos Angeles, CA 900351770549917
- Rafael ReisfeldLos Angeles, CA 900351861576290
- Barbara Eaton, MDLos Angeles, CA 900341215004049
- Kim Hargis, MDLos Angeles, CA 900341851443071
Common questions
What is Gregory A. Chambers, MD's NPI number?
Gregory A. Chambers, MD's National Provider Identifier (NPI) is 1972546406, issued on Jun 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory A. Chambers, MD located?
The NPPES record lists a practice address at 231 W Vernon Ave Ste 202, Los Angeles, CA, 90037. Phone: (323) 238-7192. Providers update this record themselves, so call before visiting.
How can I verify Gregory A. Chambers, MD's license?
NPPES lists California license number A62663, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory A. Chambers, MD prescribe under Medicare Part D?
In 2024, Gregory A. Chambers, MD had 15 Medicare Part D claims; the average among surgery physician prescribers was 147. Part D covers Medicare prescriptions only.
What is Gregory A. Chambers, MD's MIPS final score?
The 2023 MIPS final score is 87.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.