Quick answers
- Which hospitals does John S. Geraghty work at?
- Medicare's official clinician data lists John S. Geraghty at 5 hospitals: AdventHealth Castle Rock, AdventHealth Parker, Sky Ridge Medical Center, The Medical Center of Aurora & South Hospital and University of Colorado Hospital Authority. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John S. Geraghty see patients?
- Medicare's clinician data lists 4 practice locations, including Parker, CO, Denver, CO and Centennial, CO. Call before your visit to confirm the address.
- What is John S. Geraghty's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does John S. Geraghty accept Medicare assignment?
- Yes. Medicare's clinician data says John S. Geraghty 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 John S. Geraghty?
- (303) 617-4700, as listed in official Medicare / NPI Registry data.
- What is John S. Geraghty's NPI number?
- 1508800566. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John S. Geraghty works
Medicare's Facility Affiliation Data lists John S. Geraghty at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- AdventHealth Castle RockCastle Rock, CO · Acute Care Hospital · CCN 060125
- AdventHealth ParkerParker, CO · Acute Care Hospital · CCN 060114
- Sky Ridge Medical CenterLone Tree, CO · Acute Care Hospital · CCN 060112
- The Medical Center of Aurora & South HospitalAurora, CO · Acute Care Hospital · CCN 060100
- University of Colorado Hospital AuthorityAurora, CO · Acute Care Hospital · CCN 060024
Practice locations
Addresses where John S. Geraghty is enrolled with Medicare (CMS data updated 2026-10-02).
- 10470 S Progress Way, Unit 104Parker, CO 80134 (303) 617‑4700
- 22 S Adams StDenver, CO 80209 (303) 321‑2452
- 6746 S Revere Pkwy, Suite 180Centennial, CO 80112 (303) 632‑3640
- 8601 Turnpike Dr, Suite 204Westminster, CO 80031 (303) 222‑4312
Group practices
Medicare enrollment lists John S. Geraghty as a member of these groups (CMS data updated 2026-10-02).
- Legacy Healthcare Services Inc3,223 clinicians in the group
- Select Physical Therapy Holdings Inc2,024 clinicians in the group
- Select Physical Therapy of West Denver Limited Partnership548 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Parker
Clinicians with the same Medicare primary specialty in Parker, CO — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Colorado School Of Medicine, Denver |
| Graduation year | 1992 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1508800566 |
| 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