Quick answers
- Which hospitals does Cassing Hammond work at?
- Medicare's official clinician data lists Cassing Hammond at 1 hospital: Northwestern Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Cassing Hammond see patients?
- Medicare's clinician data lists 8 practice locations, including Chicago, IL, Barlett, IL and Bartlett, IL. Call before your visit to confirm the address.
- What is Cassing Hammond's specialty?
- Medicare lists Obstetrics/Gynecology as the primary specialty.
- Does Cassing Hammond accept Medicare assignment?
- Yes. Medicare's clinician data says Cassing Hammond accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Cassing Hammond?
- (312) 472-3660, as listed in official Medicare / NPI Registry data.
- What is Cassing Hammond's NPI number?
- 1447260112. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Cassing Hammond works
Medicare's Facility Affiliation Data lists Cassing Hammond at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Northwestern Memorial HospitalChicago, IL · Acute Care Hospital · CCN 140281
Practice locations
Addresses where Cassing Hammond is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 8; the Medicare profile lists all.
Group practices
Medicare enrollment lists Cassing Hammond as a member of this group (CMS data updated 2026-10-02).
- Northwestern Medical Faculty Foundation4,503 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Chicago
Clinicians with the same Medicare primary specialty in Chicago, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Missouri Medical College |
| Graduation year | 1988 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1447260112 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians