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

John Masou Ellison, MD

Individual provider Emergency Medicine Physician · NPI 1093845943

John Masou Ellison, MD is an Emergency Medicine in Monterey, California. Graduated from University of California, San Diego School of Medicine in 1990, 36 years ago. Practices with Monterey Bay Observation Medicine, a 32-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
36
Trained at
University of California, San Diego School of Medicine
Licensed in
CA
In the registry since
2007
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

23625 Wr Holman Hwy
Monterey, CA 93940
Phone: (831) 624-5311
Fax: (831) 625-4948
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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 G79299 (CA)

Record details

NPI number1093845943
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 7, 2007
Last updated in NPPESJuly 8, 2007
Mailing addressPo Box Hh, Business Development Department, Monterey, CA 93940

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolUNIVERSITY OF CALIFORNIA, SAN DIEGO SCHOOL OF MEDICINE
Graduated 1990 (36 years in practice)
Group practice Monterey Bay Observation Medicine — 32 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Other providers in Monterey