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

Dr. James D. Mosson, MD

Individual provider Internal Medicine Physician · NPI 1437135670

Dr. James D. Mosson, MD is an Internal Medicine in Sonora, California. Graduated from University of California, Davis School of Medicine in 1972, 54 years ago. Practices with Mark Twain Health Care District, a 17-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
54
Trained at
University of California, Davis School of Medicine
Licensed in
CA
In the registry since
2005
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

900 Greenley Rd Ste 922
Sonora, CA 95370-5287
Phone: (209) 536-3738
Fax: (209) 536-3565
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence G25381 (CA)

Record details

NPI number1437135670
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 20, 2005
Last updated in NPPESJuly 13, 2026
Mailing address900 Greenley Rd, Suite 922, Sonora, CA 95370-5287

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF CALIFORNIA, DAVIS SCHOOL OF MEDICINE
Graduated 1972 (54 years in practice)
Group practice Mark Twain Health Care District — 17 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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