Donald Blair Maisel, MD
Family Medicine Physician · Brentwood, CA
Donald Blair Maisel, MD is a family medicine physician with a practice address in Brentwood, California, and NPI 1740246495, issued on Apr 21, 2006. Check the license (California G42394, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Donald Blair Maisel
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G42394 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2400 Balfour RD Ste 120, Brentwood, CA 94513
- Phone
- (925) 308-8111
- Enumerated
- Apr 21, 2006
- Record last updated
- Mar 27, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicaid ID
- 00G423940 CA
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 2400 Balfour RD Ste 120
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Hersh Patel, M.D.Family Medicine Physician1992969703
Verify Donald Blair Maisel in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G42394Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average family medicine physician in 2024
36 Medicare Part D claims, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 36% 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.
Donald Blair Maisel among 17,133 family medicine physician records in California
Donald Blair Maisel, MD 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 fileNo · 62% of these records are
- Record last updated2019 · 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).
19 family medicine physician records list a practice address in Brentwood
They are 19 of the 1,212 NPPES records with a practice address in Brentwood, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Brentwood → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Krishna Bhaskarabhatla, MDBrentwood, CA 945131689621849
- Scott Bledsoe, D.O.Brentwood, CA 945131275587586
- Nilima Desai, M.D.Brentwood, CA 945131801094834
- Teginder Dhanoa, M.D.Brentwood, CA 945131801915830
- Lance Gibson, M.D.Brentwood, CA 945131962427633
- Michelle HolmesBrentwood, CA 945131720145626
- Adric Huynh, B.S.,M.S.,M.D.Brentwood, CA 945131760687107
- Derek Johnson, D.O.Brentwood, CA 945131407876063
Common questions
What is Donald Blair Maisel, MD's NPI number?
Donald Blair Maisel, MD's National Provider Identifier (NPI) is 1740246495, issued on Apr 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Donald Blair Maisel, MD located?
The NPPES record lists a practice address at 2400 Balfour RD Ste 120, Brentwood, CA, 94513. Phone: (925) 308-8111. Providers update this record themselves, so call before visiting.
How can I verify Donald Blair Maisel, MD's license?
NPPES lists California license number G42394, 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 Donald Blair Maisel, MD prescribe under Medicare Part D?
In 2024, Donald Blair Maisel, MD had 36 Medicare Part D claims; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
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.