Gregory Robert Cook Jr., APRN, CNP

Gregory Cook practices at Northwestern Medical Group in Chicago, Illinois.

Gregory Cook's NPI, 1053964395, was assigned on July 16, 2019. Gregory Cook holds Illinois license 209027656.

Gregory Cook'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.

Gregory Cook's primary practice is Northwestern Medical Group in Chicago, Illinois. Gregory Cook is also affiliated with Northwestern Memorial Hospital. The medical group on file is Northwestern Medical Faculty Foundation. Dmand AI also links Gregory Cook to 2 more hospitals 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 Gregory Cook practices, 4 sites in all. Vendor and product names are available with a free account.

Nurse practitioner is Gregory Cook's primary specialty in the NPI Registry, under taxonomy code 363L00000X. Dmand AI has Gregory Cook's licenses on file in 2 states: Illinois and Florida.

CMS counts 373 Medicare patients who saw Gregory Cook in 2024. The largest group is 65 to 74, with 149 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 19% are also on Medicaid. Their average risk score is 1.89, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Gregory Cook's median patient age at 69, with 52% women.

In 2024, Gregory Cook wrote 743 Medicare Part D claims for 239 patients. 42% of them were for generic drugs.

Gregory Cook accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Gregory Cook as offering telehealth.

CMS Open Payments shows 4 general payments to Gregory Cook from 2 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Insmed, Inc. paid the most, $78.