Deborah A. Greer, M.D.
Family Medicine Physician · Walnut Creek, CA
Deborah A. Greer, M.D. is a family medicine physician with a practice address in Walnut Creek, California, and NPI 1003851858, issued on Jun 17, 2006. Check the license (California A64667, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Deborah A. Greer
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A64667 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1450 Treat Blvd, Walnut Creek, CA 94597
- Phone
- (925) 296-9000
- Enumerated
- Jun 17, 2006
- Record last updated
- Apr 2, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (925) 296-9071
- Medicaid ID
- 00A646670 CA
- Medicare enrollment
- Enrolled (PECOS I20050301000884); accepts Medicare assignment
- Medical or professional school
- University Of California, Davis School Of Medicine, 1996
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 1450 Treat Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Chanda Banwat, M.D.Internal Medicine Physician1750584389
Verify Deborah A. Greer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A64667Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average family medicine physician in 2024
64 Medicare Part D claims for 30 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
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 MIPS final score for 2023 (Medicare payment program): 96.5 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- John Muir Physician NetworkWalnut Creek, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Deborah A. Greer among 17,133 family medicine physician records in California
Deborah A. Greer, M.D. is one of 17,133 family medicine physician records with a practice address in California. 81% 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, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1996 · median 2005 among the 10,652 with a school on file
- Record last updated2014 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
116 family medicine physician records list a practice address in Walnut Creek
They are 116 of the 6,170 NPPES records with a practice address in Walnut Creek, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Walnut Creek → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Russell Alpert, M.D.Walnut Creek, CA 945971235182544
- John Cho, M.D.Walnut Creek, CA 945971609816107
- Grace Chou, M.D.Walnut Creek, CA 945971053309369
- Robert Eidus, MDWalnut Creek, CA 945971215901871
- Lance Gee, M.D.Walnut Creek, CA 945971497731665
- Lawren Hicks, M.D.Walnut Creek, CA 945971619912680
- Seigfred Jalalon, M.D.Walnut Creek, CA 945971043231038
- Keith Johnson, MDWalnut Creek, CA 945971568449494
Common questions
What is Deborah A. Greer, M.D.'s NPI number?
Deborah A. Greer, M.D.'s National Provider Identifier (NPI) is 1003851858, issued on Jun 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Deborah A. Greer, M.D. located?
The NPPES record lists a practice address at 1450 Treat Blvd, Walnut Creek, CA, 94597. Phone: (925) 296-9000. Providers update this record themselves, so call before visiting.
How can I verify Deborah A. Greer, M.D.'s license?
NPPES lists California license number A64667, 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 Deborah A. Greer, M.D. prescribe under Medicare Part D?
In 2024, Deborah A. Greer, M.D. had 64 Medicare Part D claims for 30 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Deborah A. Greer, M.D.'s MIPS final score?
The 2023 MIPS final score is 96.5 of 100. 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.