Quick answers
- Which hospitals does Gregory Hahn work at?
- Medicare's official clinician data lists Gregory Hahn at 2 hospitals: AdventHealth Shawnee Mission and Stormont Vail Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregory Hahn see patients?
- Medicare's clinician data lists 2 practice locations, including Merriam, KS. Call before your visit to confirm the address.
- What is Gregory Hahn's specialty?
- Medicare lists Psychiatry as the primary specialty.
- Does Gregory Hahn accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory Hahn 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 Gregory Hahn?
- (913) 632-9100, as listed in official Medicare / NPI Registry data.
- What is Gregory Hahn's NPI number?
- 1972702215. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gregory Hahn works
Medicare's Facility Affiliation Data lists Gregory Hahn at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- AdventHealth Shawnee MissionShawnee Mission, KS · Acute Care Hospital · CCN 170104
- Stormont Vail HospitalTopeka, KS · Acute Care Hospital · CCN 170086
Practice locations
Addresses where Gregory Hahn is enrolled with Medicare (CMS data updated 2026-10-02).
- 9100 W 74th StMerriam, KS 66204
- 9301 W 74th StMerriam, KS 66204 (913) 632‑9100
Group practices
Medicare enrollment lists Gregory Hahn as a member of this group (CMS data updated 2026-10-02).
- Shawnee Mission Medical Center Inc286 clinicians in the group
Specialties
- Psychiatryprimary
Other psychiatrists in Merriam
Clinicians with the same Medicare primary specialty in Merriam, KS — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2007 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1972702215 |
| 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