Dr. Marc S. Demyun, MD

Dr. Demyun practices at Tribal Diagnostics - Oklahoma City (S Lakeside Dr) in Oklahoma City, Oklahoma.

Dr. Demyun's NPI, 1952366684, was assigned on April 18, 2006. Dr. Demyun graduated from Ross University School of Medicine in 1996. Dr. Demyun's Mississippi license number on file is 17980.

Dr. Demyun's primary practice is Tribal Diagnostics - Oklahoma City (S Lakeside Dr), at 3600 S Lakeside Dr, Oklahoma City, OK 73179. The practice phone is (405) 896-2978.

Dr. Demyun's primary practice is Tribal Diagnostics - Oklahoma City (S Lakeside Dr) in Oklahoma City, Oklahoma. Dr. Demyun is also affiliated with Hunt Regional Medical Center Greenville. The medical group on file is Questcare Partners. Dmand AI also links Dr. Demyun to 3 more hospitals, 6 medical groups, 3 group practices and clinics, 1 physician office and 1 hospice, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Demyun practices, 10 sites in all. Vendor and product names are available with a free account.

Internal medicine is Dr. Demyun's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Demyun is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Demyun's licenses on file in 6 states: Mississippi, Florida, Hawaii, Texas, Oklahoma and Pennsylvania.

Dmand AI lists acute diabetes, gastrointestinal bleeding, gastrointestinal inflammation, kidney failure, mini-stroke (TIA), non-surgical back problems, sepsis and stroke among the conditions Dr. Demyun treats.

CMS data shows 358 Medicare services from Dr. Demyun across 4 procedure codes in 2024, for 209 Medicare patients. Medicare paid $25,436 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 209 Medicare patients who saw Dr. Demyun in 2024. The largest group is 75 to 84, with 73 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 20% are also on Medicaid. Their average risk score is 2.60, 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. Demyun's median patient age at 54, with 55% women.

In 2024, Dr. Demyun wrote 407 Medicare Part D claims for 90 patients. 89% of them were for generic drugs. CMS names the drug for 111 of them, across 8 drugs with 11 or more claims each, at $767 in total drug cost. In 2023, CMS named 11 claims across 1 drug.

Dr. Demyun accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Demyun as offering telehealth. CMS counts 126 procedures of removal of tissue by Dr. Demyun, more than 87% of the clinicians it reports for that procedure.

CMS Open Payments shows 173 general payments to Dr. Demyun from 24 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 47% of the total. Gilead Sciences, Inc. paid the most, $5,840.

Dr. Demyun graduated from Ross University School of Medicine in 1996.

Dr. Demyun is in network with 22 carriers, including Aetna, Elevance and United Healthcare. PPO plans come from the most carriers, 14. Check the plan with the practice before a visit.