Dr. Jeffrey C. Mark, MD

Dr. Mark practices at Northern California Surgery Center in Turlock, California.

Dr. Mark's NPI, 1487603155, was assigned on May 9, 2006. Dr. Mark graduated from University of Illinois College of Medicine - Chicago in 1992. Dr. Mark holds California license G83524.

Dr. Mark's primary practice is Northern California Surgery Center, at 3850 Geer Road, Turlock, CA 95382. The practice phone is (209) 668-9866.

Dr. Mark's primary practice is Northern California Surgery Center in Turlock, California. Dr. Mark is also affiliated with Emanuel Medical Center. Dmand AI also links Dr. Mark to 1 more physician office, named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mark practices, 3 sites in all. Vendor and product names are available with a free account.

Gastroenterology is Dr. Mark's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Mark is board certified in gastroenterology by the American Board of Internal Medicine. Dmand AI has Dr. Mark's licenses on file in 3 states: California, Illinois and Hawaii.

Dmand AI lists acid reflux, acute gastroduodenitis, chronic indigestion, chronic inflammatory bowel disease (IBD), cirrhosis of the liver, colonoscopy, fatty liver and gastroduodenitis among the conditions Dr. Mark treats.

CMS data shows 838 Medicare services from Dr. Mark across 5 procedure codes in 2024, for 240 Medicare patients. Medicare paid $88,627 for them.

CMS counts 240 Medicare patients who saw Dr. Mark in 2024. The largest group is 65 to 74, with 111 patients. 75% of them have high cholesterol, and 69% have high blood pressure. Their average risk score is 1.03, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Mark's median patient age at 62, with 53% women.

In 2024, Dr. Mark wrote 540 Medicare Part D claims for 168 patients. 76% of them were for generic drugs. CMS names the drug for 405 of them, across 15 drugs with 11 or more claims each, at $42,365 in total drug cost. In 2023, CMS named 353 claims across 13 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 81 out of 100 for Dr. Mark for performance year 2024, reported individually. Dr. Mark accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 78 procedures of colonoscopy by Dr. Mark, more than 74% of the clinicians it reports for that procedure.

CMS Open Payments shows 595 general payments to Dr. Mark from 31 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 53% of the total. Abbvie Inc. paid the most, $12,431.

Dmand AI lists 1 award for Dr. Mark, most recently CMS Stage 1 2012 in 2011.

Dr. Mark graduated from University of Illinois College of Medicine - Chicago in 1992.

Dr. Mark is in network with 13 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.