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

Dr. Mark Hachiro Sawamura, OD

Individual provider Optometrist · NPI 1497858898

Dr. Mark Hachiro Sawamura, OD is registered under Optometry in Fullerton, California. Graduated from Southern California College of Optometry in 1991, 35 years ago. Practices with Marshall B Ketchum University, a 55-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
35
Trained at
Southern California College of Optometry
Licensed in
CA
In the registry since
2006
What do these letters mean?
OD — Doctor of Optometry
An optometrist: examines eyes, prescribes glasses and contacts, and treats many eye conditions.

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Practice location Address checks out

2575 Yorba Linda Blvd
Fullerton, CA 92831-1699 Not confirmed with CMS for 16 years — call before visiting
Phone: (714) 449-7407
Fax: (714) 992-7871
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Optometrist (primary) Taxonomy 152W00000X · Licence 9835TPL (CA)

Record details

NPI number1497858898
Entity typeIndividual (Type 1)
GenderMale
Credentials OD
Sole proprietorNo
NPI enumeratedSeptember 7, 2006
Last updated in NPPESFebruary 17, 2010

Medicare enrollment

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

Medicare specialtyOPTOMETRY
Medical schoolSOUTHERN CALIFORNIA COLLEGE OF OPTOMETRY
Graduated 1991 (35 years in practice)
Group practice Marshall B Ketchum University — 55 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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 patients17
Services billed 45 a service is one billed item, such as a visit, a test or a procedure
Average patient age78

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.

Colleagues at Marshall B Ketchum University

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 55 clinicians in the practice; 12 are shown here.

Other providers in Fullerton