Dr. Gregory C. Warner, MD

Dr. Warner practices at Visalia Medical Clinic - Imaging - Adventist Health Physicians Network in Visalia, California.

Dr. Warner's NPI, 1699810689, was assigned on February 20, 2007. Dr. Warner graduated from UNMC in 1980. Dr. Warner's California license number on file is G55305.

Dr. Warner's primary practice is Visalia Medical Clinic - Imaging - Adventist Health Physicians Network, at 5400 W. Hillsdale, Visalia, CA 93291.

Dr. Warner's primary practice is Visalia Medical Clinic - Imaging - Adventist Health Physicians Network in Visalia, California. Dr. Warner is also affiliated with Kaweah Health Medical Center. The medical group on file is Adventist Health Physicians Network. Dmand AI also links Dr. Warner to 3 more hospitals, 3 medical groups and 2 group practices and clinics, each named with a free account. Dr. Warner's employer is on file too: a breast imaging center.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Warner practices, 7 sites in all. Vendor and product names are available with a free account.

Critical care medicine is Dr. Warner's primary specialty in the NPI Registry, under taxonomy code 207RC0200X. Dr. Warner is board certified in critical care medicine by the American Board of Internal Medicine. Dmand AI has Dr. Warner's licenses on file in 2 states: California and Wisconsin.

Dmand AI lists asthma, chronic lung disease, chronic obstructive pulmonary disease (COPD), chronic respiratory failure, pleural effusion, pulmonary fibrosis, sleep apnea and tobacco use among the conditions Dr. Warner treats.

CMS data shows 1,154 Medicare services from Dr. Warner across 14 procedure codes in 2024, for 570 Medicare patients. Medicare paid $126,739 for them.

CMS counts 570 Medicare patients who saw Dr. Warner in 2024. The largest group is 65 to 74, with 230 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 28% are also on Medicaid. Their average risk score is 2.13, 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. Warner's median patient age at 68, with 54% women.

In 2024, Dr. Warner wrote 859 Medicare Part D claims for 190 patients. 38% of them were for generic drugs. CMS names the drug for 784 of them, across 14 drugs with 11 or more claims each, at $1,053,631 in total drug cost. In 2023, CMS named 774 claims across 15 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 96 out of 100 for Dr. Warner for performance year 2024, reported through an alternative payment model (APM). Dr. Warner accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

CMS Open Payments shows 404 general payments to Dr. Warner from 40 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Boehringer Ingelheim Pharmaceuticals, Inc. paid the most, $2,360.

Dr. Warner graduated from UNMC in 1980.

Dr. Warner is in network with 17 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 11. Check the plan with the practice before a visit.