Karissa Hammer M.D.
About this NPIWhat this record shows.
NPI 1801277736 is registered to Karissa Hammer M.D., a Obstetrics & Gynecology practising at 680 N Lake Shore Dr, Suite 100 in Chicago, Illinois. Obstetricians and Gynecologists (OB/GYNs) provide medical and surgical care for the female reproductive system, including pregnancy, childbirth, and gynecologic conditions. Karissa Hammer M.D. has been enumerated in the National Provider Identifier (NPI) registry since 2015.
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Insurance & acceptsHow to confirm coverage.
The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans Karissa Hammer M.D. accepts. To confirm in-network status with your specific health plan, contact Karissa Hammer M.D. directly at (312) 288-6420.
Frequently asked
Yes. NPI 1801277736 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Obstetricians and Gynecologists (OB/GYNs) provide medical and surgical care for the female reproductive system, including pregnancy, childbirth, and gynecologic conditions.
The CMS NPPES Public Registry at npiregistry.cms.hhs.gov is the authoritative source. FindMyNPI mirrors this dataset and refreshes monthly. For real-time verification, you can also call the provider's office at (312) 288-6420.
An individual healthcare provider has a single Type-1 NPI for life. Organisations can hold separate Type-2 NPIs per location, specialty, or sub-entity. Karissa Hammer M.D. is a Type-1 individual NPI.