Michael S. Maehara, M.D.
Rheumatology Physician · Long Beach, CA
Michael S. Maehara, M.D. is a rheumatology physician with a practice address in Long Beach, California, and NPI 1316969629, issued on Jul 24, 2006. Check the license (California 39815, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael S. Maehara
- Credential
- M.D.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License numbers
- 39815 CA
A39815 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2220 Clark Ave, Long Beach, CA 90815
- Phone
- (562) 597-4181
- Enumerated
- Jul 24, 2006
- Record last updated
- Jul 15, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (562) 597-7083
- Medicaid ID
- 00A398150 CA
- Medicare enrollment
- Enrolled (PECOS I20110224000496); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 926 in California → Look up another NPI →
Also registered at 2220 Clark Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Robert Castillo, M.D.Pediatrics Physician1063421980
- Dionisio Dabu, M.D.Family Medicine Physician1538272885
- Larisa Garbar, M.D.Hospitalist Physician1811906753
- Arshia Hashmy, M.D.Pediatrics Physician1528073269
- Lindsay Hutchinson, P.A.-CPhysician Assistant1023157542
- Eduardo JuarezFamily Nurse Practitioner1780486860
Verify Michael S. Maehara in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 39815Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
35% more Medicare Part D claims than the average rheumatology physician in 2024
2,675 Medicare Part D claims for 422 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 187 claims were for opioids.
Most prescribed
- Methotrexate344 claims
- Hydroxychloroquine Sulfate338 claims
- Alendronate Sodium218 claims
- Prednisone175 claims
- Tramadol Hcl134 claims
- Prolia133 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): 76.3 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).
Bills Medicare through one group practice
- Pih Health PhysiciansDowney, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael S. Maehara among 926 rheumatology physician records in California
Michael S. Maehara, M.D. is one of 926 rheumatology 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, 55% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1981 · median 2003 among the 641 with a school on file
- Record last updated2016 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in California
There are 926 rheumatology physician records in California.
All 926 in California → Every provider in Long Beach → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Nancy Godfrey, M.D.Long Beach, CA 908151790777449
- Geoffrey Dolan, MDLong Beach, CA 908081811910847
- Noreen Hussaini, M.D.Long Beach, CA 908081093907198
- Jeffrey Chwa, DOLong Beach, CA 908061285989236
- Joshpaul Dhillon, MDLong Beach, CA 908061942706825
- Nathaniel Neal, M.D.Long Beach, CA 908061720006729
- Chau Nguyen, D.O.Long Beach, CA 908061861718397
- Jeremy Anuntiyo, MDSan Pedro, CA 907321811183585
Common questions
What is Michael S. Maehara, M.D.'s NPI number?
Michael S. Maehara, M.D.'s National Provider Identifier (NPI) is 1316969629, issued on Jul 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael S. Maehara, M.D. located?
The NPPES record lists a practice address at 2220 Clark Ave, Long Beach, CA, 90815. Phone: (562) 597-4181. Providers update this record themselves, so call before visiting.
How can I verify Michael S. Maehara, M.D.'s license?
NPPES lists California license number 39815, 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 Michael S. Maehara, M.D. prescribe under Medicare Part D?
In 2024, Michael S. Maehara, M.D. had 2,675 Medicare Part D claims for 422 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
What is Michael S. Maehara, M.D.'s MIPS final score?
The 2023 MIPS final score is 76.3 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.