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

Jeffrey Thomas

Individual provider Hospitalist Physician · NPI 1932337136

Jeffrey Thomas is an Internal Medicine in Orange, California. Graduated from Tufts University School of Medicine in 2009, 17 years ago. Practices with J M Geiss DO APC, a 13-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
17
Trained at
Tufts University School of Medicine
Licensed in
CA
In the registry since
2009
Specialties on file
2
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Practice location Address checks out

2592 N Santiago Blvd
Orange, CA 92867-1862
Phone: (855) 434-7763
Fax: (949) 281-5550
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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 A115831 (CA)
Hospitalist Physician Taxonomy 208M00000X · Licence A115831 (CA)

Record details

NPI number1932337136
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedJune 25, 2009
Last updated in NPPESDecember 11, 2023
Certification dateDecember 11, 2023
Mailing address2592 N Santiago Blvd, Orange, CA 92867-1862

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolTUFTS UNIVERSITY SCHOOL OF MEDICINE
Graduated 2009 (17 years in practice)
Group practice J M Geiss Do Apc — 13 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations47 on file with Medicare

Other providers in Orange