Andrew Masaaki Osugi, M.D.
Emergency Medicine Physician · Berkeley, CA
Andrew Masaaki Osugi, M.D. is an emergency medicine physician with a practice address in Berkeley, California, and NPI 1134307382, issued on Feb 8, 2008. Check the license (California A102449, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Andrew Masaaki Osugi
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A102449 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2450 Ashby Ave Ste 1160, Berkeley, CA 94705
- Phone
- (510) 655-4000
- Enumerated
- Feb 8, 2008
- Record last updated
- Feb 8, 2008 (not updated in 18 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20081031000071); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 2004
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Verify Andrew Masaaki Osugi in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A102449Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
14% more Medicare Part D claims than the average emergency medicine physician in 2024
258 Medicare Part D claims for 186 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 51 claims were for opioids.
Most prescribed
- Cephalexin46 claims
- Hydrocodone-Acetaminophen34 claims
- Ondansetron Odt19 claims
- Prednisone12 claims
- Ibuprofen11 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): 94.6 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
- Cep America - CaliforniaConcord, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Andrew Masaaki Osugi among 7,751 emergency medicine physician records in California
Andrew Masaaki Osugi, M.D. is one of 7,751 emergency 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 2008, is newer than 50% of them.
- NPI issued2008 · 50% of these records are older, 46% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2004 · median 2011 among the 4,560 with a school on file
- Record last updated2008 · 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 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Berkeley → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Karen Carothers, MDBerkeley, CA 947051619935830
- Jeff Chen, DRBerkeley, CA 947051912973074
- Brian Hinrichsen, PABerkeley, CA 947051376534792
- Michael Jugo, MDBerkeley, CA 947051609972066
- Sarah Kelmenson-Chau, MDBerkeley, CA 947051689796674
- Michael Kessler, MDBerkeley, CA 947051316995830
- Michael Liu, MDBerkeley, CA 947051467571091
- Marjorie Macqueen, PABerkeley, CA 947051215995576
Common questions
What is Andrew Masaaki Osugi, M.D.'s NPI number?
Andrew Masaaki Osugi, M.D.'s National Provider Identifier (NPI) is 1134307382, issued on Feb 8, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Andrew Masaaki Osugi, M.D. located?
The NPPES record lists a practice address at 2450 Ashby Ave Ste 1160, Berkeley, CA, 94705. Phone: (510) 655-4000. Providers update this record themselves, so call before visiting.
How can I verify Andrew Masaaki Osugi, M.D.'s license?
NPPES lists California license number A102449, 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 Andrew Masaaki Osugi, M.D. prescribe under Medicare Part D?
In 2024, Andrew Masaaki Osugi, M.D. had 258 Medicare Part D claims for 186 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Andrew Masaaki Osugi, M.D.'s MIPS final score?
The 2023 MIPS final score is 94.6 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.