Dr. Andrew James Overhiser, MD

Dr. Overhiser practices at Flagstaff Medical Center in Flagstaff, Arizona, part of Northern Arizona Healthcare.

Dr. Overhiser's NPI, 1679789549, was assigned on May 15, 2007. Dr. Overhiser graduated from Indiana University School of Medicine in 2004. Dr. Overhiser holds Arizona license 42636.

Dr. Overhiser's primary practice is Flagstaff Medical Center, at 1200 North Beaver Street, Flagstaff, AZ 86001 in Coconino County. The practice phone is (928) 779-3366.

Dr. Overhiser's primary practice is Flagstaff Medical Center in Flagstaff, Arizona, part of Northern Arizona Healthcare. Dr. Overhiser is also affiliated with Verde Valley Medical Center. The medical group on file is Northern Arizona Healthcare. Dmand AI also links Dr. Overhiser to 1 more group practice or clinic, named with a free account.

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

Gastroenterology is Dr. Overhiser's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Overhiser is licensed in Arizona.

CMS data shows 456 Medicare services from Dr. Overhiser across 10 procedure codes in 2024, for 347 Medicare patients. Medicare paid $55,240 for them.

CMS counts 347 Medicare patients who saw Dr. Overhiser in 2024. The largest group is 65 to 74, with 192 patients. 73% of them have high cholesterol, and 61% have high blood pressure. 13% are also on Medicaid. Their average risk score is 0.94, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Overhiser's median patient age at 60, with 56% women.

In 2024, Dr. Overhiser wrote 826 Medicare Part D claims for 493 patients. 83% of them were for generic drugs. CMS names the drug for 687 of them, across 13 drugs with 11 or more claims each, at $19,451 in total drug cost. In 2023, CMS named 755 claims across 17 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 82 out of 100 for Dr. Overhiser for performance year 2024, reported as part of a group. Dr. Overhiser accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Overhiser as offering telehealth. CMS counts 117 procedures of colonoscopy by Dr. Overhiser, more than 83% of the clinicians it reports for that procedure.

Dmand AI links 3 papers to Dr. Overhiser, published from 2011 to 2012. 2012 was the busiest year, with 2. The most frequent topics are Adenocarcinoma, Barrett Esophagus and Esophageal Neoplasms. Dr. Overhiser's most frequent co-authors are Prateek Sharma, MD, Srinivas Gaddam, MD and Douglas W. Mapel, MD.

CMS Open Payments shows 76 general payments to Dr. Overhiser from 20 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $337.

Dr. Overhiser graduated from Indiana University School of Medicine in 2004.