Quick answers
- Which hospitals does Kevin S. Sieja work at?
- Medicare's official clinician data lists Kevin S. Sieja at 3 hospitals: HCA HealthOne Presbyterian St. Lukes, HCA HealthONE Rose and Valley View Hospital Association. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Kevin S. Sieja see patients?
- Medicare's clinician data lists 4 practice locations, including Vail, CO, Denver, CO and Avon, CO. Call before your visit to confirm the address.
- What is Kevin S. Sieja's specialty?
- Medicare lists Gastroenterology as the primary specialty.
- Does Kevin S. Sieja accept Medicare assignment?
- Yes. Medicare's clinician data says Kevin S. Sieja 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 Kevin S. Sieja?
- (970) 926-6340, as listed in official Medicare / NPI Registry data.
- What is Kevin S. Sieja's NPI number?
- 1952356677. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Kevin S. Sieja works
Medicare's Facility Affiliation Data lists Kevin S. Sieja at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- HCA HealthOne Presbyterian St. LukesDenver, CO · Acute Care Hospital · CCN 060014
- HCA HealthONE RoseDenver, CO · Acute Care Hospital · CCN 060032
- Valley View Hospital AssociationGlenwood Springs, CO · Acute Care Hospital · CCN 060075
Practice locations
Addresses where Kevin S. Sieja is enrolled with Medicare (CMS data updated 2026-10-02).
- 180 S Frontage Rd W, Suite 5800Vail, CO 81657 (970) 926‑6340
- 1960 N Ogden St, Suite 220Denver, CO 80218 (303) 861‑0808
- 4500 E 9th Ave, Suite 720sDenver, CO 80220 (303) 861‑0808
- 50 Buck Creek Rd, Suite 200Avon, CO 81620 (970) 926‑6350
Group practices
Medicare enrollment lists Kevin S. Sieja as a member of these groups (CMS data updated 2026-10-02).
- Colorado Mountain Medical, LLC63 clinicians in the group
- Denver Digestive Health Specialists Inc20 clinicians in the group
- Colorado Gastroenterology Prof LLC4 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Colorado
Clinicians with the same Medicare primary specialty in Colorado — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2000 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1952356677 |
| 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