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

Dr. Matthew Russell Callahan, MD

Individual provider Family Medicine Physician · NPI 1083901839

Dr. Matthew Russell Callahan, MD is a Hospitalist in San Diego, California. Qualified in 2011, 15 years ago. Practices with Scripps Health, a 1,446-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
15
Licensed in
CA
In the registry since
2011
Specialties on file
2
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

4077 Fifth Ave Mer 127
San Diego, CA 92103-2105
Phone: (619) 260-7125
Fax: (619) 686-3874
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence 131315 (CA)
Family Medicine Physician Taxonomy 207Q00000X · Licence 131315 (CA)

Record details

NPI number1083901839
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 30, 2011
Last updated in NPPESNovember 20, 2019

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Also practisesFAMILY PRACTICE
Medical schoolOTHER
Graduated 2011 (15 years in practice)
Group practice Scripps Health — 1446 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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