Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Andrew Masaaki Osugi, MD

Individual provider Emergency Medicine Physician · NPI 1134307382

Dr. Andrew Masaaki Osugi, MD practises Emergency Medicine in Berkeley, California. Graduated from University of California, Geffen School of Medicine in 2004, 22 years ago. Practices with Cep America - California, a 1,267-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
22
Trained at
University of California, Geffen School of Medicine
Licensed in
CA
In the registry since
2008
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2450 Ashby Ave Ste 1160
Berkeley, CA 94705-2067 Not confirmed with CMS for 18 years — call before visiting
Phone: (510) 655-4000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence A102449 (CA)

Record details

NPI number1134307382
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedFebruary 8, 2008
Last updated in NPPESFebruary 8, 2008

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyEMERGENCY MEDICINE
Medical schoolUNIVERSITY OF CALIFORNIA, GEFFEN SCHOOL OF MEDICINE
Graduated 2004 (22 years in practice)
Group practice Cep America - California — 1267 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Removal of nail tissue 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients635
Services billed 758 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • John Muir Medical Center - Concord Campus Hospital · Concord, CA · listed as John Muir Medical Ctr Concord Campus
  • John Muir Medical Center - Walnut Creek Campus Hospital · Walnut Creek, CA
  • Novato Community Hospital Hospital · Novato, CA

Colleagues at Cep America - California

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1267 clinicians in the practice; 12 are shown here.

Other providers in Berkeley