Michael J. Messer, MD
Specialist · Concord, CA
Michael J. Messer, MD is a specialist with a practice address in Concord, California, and NPI 1255438206, issued on Sep 20, 2006. Check the license (California C35893, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Michael J. Messer
- Credential
- MD
- Primary taxonomy
- Specialist 174400000X
- License number
- C35893 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2571 Park Ave, Concord, CA 94520
- Phone
- (925) 674-2100
- Enumerated
- Sep 20, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicaid ID
- 00C358930 CA
- Entity
- Type 1 · individual
8 nearest specialist records → All 5,749 in California → Look up another NPI →
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Verify Michael J. Messer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license C35893Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Michael J. Messer among 5,749 specialist records in California
Michael J. Messer, MD is one of 5,749 specialist records with a practice address in California. 30% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 60% newer
- In a Medicare fileNo · 30% of these records are
- In the CMS Doctors and Clinicians fileNo · 19% of these records are
- Record last updated2007 · 77% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Specialist providers in California
There are 5,749 specialist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 5,749 in California → Every provider in Concord → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- Premjit Chahal, M.D.Concord, CA 945201093893091
- Charles Diraimondo, M.D.Concord, CA 945201962437269
- Jacquelyn Holmes, MFTConcord, CA 945201457487571
- Stefanie Mayer, PTConcord, CA 945201124119227
- Carl Omstead, PA-CConcord, CA 945201982661427
- Monika OsullivanConcord, CA 945201518839422
- Jasbir Rana, M,DConcord, CA 945201144223934
- Ryan Tracy, M.D.Concord, CA 945201346283835
Common questions
What is Michael J. Messer, MD's NPI number?
Michael J. Messer, MD's National Provider Identifier (NPI) is 1255438206, issued on Sep 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael J. Messer, MD located?
The NPPES record lists a practice address at 2571 Park Ave, Concord, CA, 94520. Phone: (925) 674-2100. Providers update this record themselves, so call before visiting.
How can I verify Michael J. Messer, MD's license?
NPPES lists California license number C35893, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity 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. 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.