Michael Michio Maruyama, MD
Surgery Physician · Fresno, CA
Michael Michio Maruyama, MD is a surgery physician with a practice address in Fresno, California, and NPI 1649354408, issued on Oct 25, 2006. Check the license (California G32834, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael Michio Maruyama
- Credential
- MD
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- G32834 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1125 East Spruce Avenue, Fresno, CA 93720
- Phone
- (559) 450-3901
- Enumerated
- Oct 25, 2006
- Record last updated
- Feb 19, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (559) 450-3903
- Medicare enrollment
- Enrolled (PECOS I20080708000363); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 3,118 in California → Look up another NPI →
Also registered at 1125 East Spruce Avenue
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mark Cunningham, MDSurgery Physician1174621593
- Vassi Gardikas, MDSurgery Physician1881792208
- Deborah Gumina, MDSurgery Physician1679671002
- Siew-Ming Lee, MDSurgery Physician1568559342
Verify Michael Michio Maruyama in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G32834Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
40% more Medicare Part D claims than the average surgery physician in 2024
206 Medicare Part D claims for 95 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. 94 claims were for opioids.
Most prescribed
- Tramadol Hcl91 claims
- Amoxicillin-Clavulanate Potass68 claims
- Ciprofloxacin Hcl26 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): 84 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
- Community Health PartnersClovis, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Michio Maruyama among 3,118 surgery physician records in California
Michael Michio Maruyama, 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
- Graduated1975 · median 2003 among the 1,901 with a school on file
- Record last updated2013 · 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 Fresno → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Keith Boone, MDFresno, CA 937201265495139
- Mark Cunningham, MDFresno, CA 937201174621593
- Vassi Gardikas, MDFresno, CA 937201881792208
- Mario Gonzalez, M.D.Fresno, CA 937201376557991
- Deborah Gumina, MDFresno, CA 937201679671002
- Kelvin Higa, MDFresno, CA 937201356304224
- Dawn Johnson, M.D.Fresno, CA 937201629155692
- Carlos Juarez, M.D.Fresno, CA 937201285664243
Common questions
What is Michael Michio Maruyama, MD's NPI number?
Michael Michio Maruyama, MD's National Provider Identifier (NPI) is 1649354408, issued on Oct 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael Michio Maruyama, MD located?
The NPPES record lists a practice address at 1125 East Spruce Avenue, Fresno, CA, 93720. Phone: (559) 450-3901. Providers update this record themselves, so call before visiting.
How can I verify Michael Michio Maruyama, MD's license?
NPPES lists California license number G32834, 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 Michio Maruyama, MD prescribe under Medicare Part D?
In 2024, Michael Michio Maruyama, MD had 206 Medicare Part D claims for 95 beneficiaries; the average among surgery physician prescribers was 147. Part D covers Medicare prescriptions only.
What is Michael Michio Maruyama, MD's MIPS final score?
The 2023 MIPS final score is 84 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.