Quick answers
- Which hospitals does Patrick Cahill work at?
- Medicare's official clinician data lists Patrick Cahill at 2 hospitals: Greenwich Hospital Association - and Stamford Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Patrick Cahill see patients?
- Medicare's clinician data lists 1 practice location in Stamford, CT. Call before your visit to confirm the address.
- What is Patrick Cahill's specialty?
- Medicare lists Obstetrics/Gynecology as the primary specialty.
- Does Patrick Cahill accept Medicare assignment?
- Yes. Medicare's clinician data says Patrick Cahill 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 Patrick Cahill?
- (203) 353-9099, as listed in official Medicare / NPI Registry data.
- What is Patrick Cahill's NPI number?
- 1134229909. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Patrick Cahill works
Medicare's Facility Affiliation Data lists Patrick Cahill at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Greenwich Hospital Association -Greenwich, CT · Acute Care Hospital · CCN 070018
- Stamford HospitalStamford, CT · Acute Care Hospital · CCN 070006
Practice locations
Addresses where Patrick Cahill is enrolled with Medicare (CMS data updated 2026-10-02).
- 999 Summer St, Suite 401Stamford, CT 06905 (203) 353‑9099
Group practices
Medicare enrollment lists Patrick Cahill as a member of this group (CMS data updated 2026-10-02).
- Coastal Obstetrics and Gynecology5 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Stamford
Clinicians with the same Medicare primary specialty in Stamford, CT — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | New York College Of Osteo Medicine Of New York Institute Of Technology |
| Graduation year | 1996 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1134229909 |
| 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