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

Dr. Jeffrey C Mark, MD

Individual provider Gastroenterology Physician · NPI 1487603155

Dr. Jeffrey C Mark, MD is a Gastroenterology in Turlock, California. Graduated from University of Illinois College of Med (CHI/PEOR/ROCK/Chm-Urb) in 1992, 34 years ago. Accepts Medicare assignment. Licensed in California.

Years since qualifying
34
Trained at
University of Illinois College of Med (CHI/PEOR/ROCK/Chm-Urb)
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

2101 Geer Rd Ste #118
Turlock, CA 95382-2454
Phone: (209) 669-5000
Fax: (209) 669-5001
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence G83524 (CA)

Record details

NPI number1487603155
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 9, 2006
Last updated in NPPESJuly 13, 2026
Mailing address2101 Geer Rd, Suite #118, Turlock, CA 95382-2454

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolUNIVERSITY OF ILLINOIS COLLEGE OF MED (CHI/PEOR/ROCK/CHM-URB)
Graduated 1992 (34 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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