Dr. John K. Ryan, MD

Dr. Ryan practices at Comprehensive Digestive Surgery Center in Las Vegas, Nevada.

Dr. Ryan's NPI, 1073695698, was assigned on October 20, 2006. Dr. Ryan graduated from University of South Carolina School of Medicine in 1995. Dr. Ryan holds Nevada license 14069.

Dr. Ryan's primary practice is Comprehensive Digestive Surgery Center, at 8440 W Warm Springs Rd, Las Vegas, NV 89113. The practice phone is (702) 483-4483.

Dr. Ryan's primary practice is Comprehensive Digestive Surgery Center in Las Vegas, Nevada. Dr. Ryan is also affiliated with MountainView Hospital. The medical group on file is Comprehensive Digestive Institute of Nevada. Dmand AI also links Dr. Ryan to 1 more hospital and 1 group practice or clinic, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ryan practices, 4 sites in all. Vendor and product names are available with a free account.

Gastroenterology is Dr. Ryan's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Ryan is board certified in gastroenterology by the American Board of Internal Medicine. Dr. Ryan is licensed in Nevada.

CMS data shows 1,239 Medicare services from Dr. Ryan across 17 procedure codes in 2024, for 375 Medicare patients. Medicare paid $93,067 for them.

CMS counts 375 Medicare patients who saw Dr. Ryan in 2024. The largest group is 65 to 74, with 187 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 13% are also on Medicaid. Their average risk score is 1.56, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Ryan's median patient age at 61, with 57% women.

In 2024, Dr. Ryan wrote 404 Medicare Part D claims for 191 patients. 82% of them were for generic drugs. CMS names the drug for 320 of them, across 11 drugs with 11 or more claims each, at $112,782 in total drug cost. In 2023, CMS named 273 claims across 8 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 98 out of 100 for Dr. Ryan for performance year 2024, reported as part of a group. Dr. Ryan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 184 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Ryan, more than 89% of the clinicians it reports for that procedure.

Dmand AI links 13 papers to Dr. Ryan, published from 2017 to 2025. 2025 was the busiest year, with 5. The most frequent topics are Antiviral Agents and Hepatitis B, Chronic. Dr. Ryan has published most often in Cureus. Dr. Ryan's most frequent co-authors are Robert Gareth Gish, MD, Kartika S. Shetty, MD and Tarek Ammar, MD.

CMS Open Payments shows 404 general payments to Dr. Ryan from 46 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Abbvie Inc. paid the most, $3,149.

Dr. Ryan graduated from University of South Carolina School of Medicine in 1995.