Dr. Katelyn Ostendorf Stepan, MD

Dr. Stepan practices at Northwestern Medical Group in Chicago, Illinois.

Dr. Stepan's NPI, 1326468489, was assigned on April 16, 2014. Dr. Stepan graduated from Washington University School of Medicine in 2014. Dr. Stepan holds Illinois license 036153453.

Dr. Stepan's primary practice is Northwestern Medical Group, at 675 N St Clair St, Chicago, IL 60611 in Cook County. The practice phone is (312) 695-0646.

Dr. Stepan's primary practice is Northwestern Medical Group in Chicago, Illinois. Dr. Stepan is also affiliated with Northwestern Memorial Hospital. The medical group on file is Northwestern Medical Faculty Foundation. Dmand AI also links Dr. Stepan to 4 more hospitals, 1 group practice or clinic and 1 medical group, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Stepan practices, 6 sites in all. Vendor and product names are available with a free account.

Otolaryngology is Dr. Stepan's primary specialty in the NPI Registry, under taxonomy code 207Y00000X. Dmand AI has Dr. Stepan's licenses on file in 2 states: Illinois and Missouri.

CMS data shows 512 Medicare services from Dr. Stepan across 7 procedure codes in 2024, for 218 Medicare patients. Medicare paid $47,597 for them. Every service was in an office.

CMS counts 218 Medicare patients who saw Dr. Stepan in 2024. The largest group is 65 to 74, with 105 patients. 75% of them have high cholesterol, and 70% have high blood pressure. 13% are also on Medicaid. Their average risk score is 1.75, 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. Stepan's median patient age at 71, with 44% women.

In 2024, Dr. Stepan wrote 57 Medicare Part D claims for 31 patients. 98% of them were for generic drugs. CMS names the drug for 12 of them, across 1 drug with 11 or more claims each, at $493 in total drug cost. In 2019, CMS named 12 claims across 1 drug.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 95 out of 100 for Dr. Stepan for performance year 2024, reported through an alternative payment model (APM). Dr. Stepan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Stepan as offering telehealth. CMS counts 11 procedures of melanoma (skin cancer) excision by Dr. Stepan, more than 64% of the clinicians it reports for that procedure.

Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)

Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)

Skin biopsy: 1 to 10 procedures (CMS shows small counts as a range)

Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)

Dmand AI links 29 papers to Dr. Stepan, published from 2017 to 2025. 2020 was the busiest year, with 7. The most frequent topics are Head and Neck Neoplasms, Squamous Cell Carcinoma of Head and Neck and Plastic Surgery Procedures. Dr. Stepan has published most often in Otolaryngol Head Neck Surg. Dr. Stepan's most frequent co-authors are Laila Alia Gharzai, MD, Ryan Scott Jackson, MD and Patrik Pipkorn, MD.

CMS Open Payments shows 10 general payments to Dr. Stepan from 6 drug and device companies from 2019 to 2025. Food and beverage make up the largest share, 45% of the total. Astellas Pharma Global Development paid the most, $700.

Dr. Stepan graduated from Washington University School of Medicine in 2014.