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

Dr. Michael Joseph Harrington, MD

Individual provider Internal Medicine Physician · NPI 1124186945

Dr. Michael Joseph Harrington, MD is a Rheumatology in Napa, California. Graduated from University of Colorado School of Medicine, Denver in 1968, 58 years ago. Practices with Sonoma County Indian Health Project Inc, a 30-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
58
Trained at
University of Colorado School of Medicine, Denver
Licensed in
CA
In the registry since
2006
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

3443 Villa Ln Ste 9
Napa, CA 94558-6417
Phone: (707) 253-8901
Fax: (707) 253-1558
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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 G17618 (CA)

Record details

NPI number1124186945
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 5, 2006
Last updated in NPPESDecember 10, 2013
Mailing address1561 3rd St Ste G, Napa, CA 94559-2861

Medicare enrollment

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

Medicare specialtyRHEUMATOLOGY
Medical schoolUNIVERSITY OF COLORADO SCHOOL OF MEDICINE, DENVER
Graduated 1968 (58 years in practice)
Group practice Sonoma County Indian Health Project Inc — 30 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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