Quick answers
- Which hospitals does Erik W. Koster work at?
- Medicare's official clinician data lists Erik W. Koster at 1 hospital: AdventHealth Castle Rock. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Erik W. Koster see patients?
- Medicare's clinician data lists 5 practice locations, including Castle Rock, CO, Denver, CO and Littleton, CO. Call before your visit to confirm the address.
- What is Erik W. Koster's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Erik W. Koster accept Medicare assignment?
- Yes. Medicare's clinician data says Erik W. Koster 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 Erik W. Koster?
- (720) 455-0650, as listed in official Medicare / NPI Registry data.
- What is Erik W. Koster's NPI number?
- 1902843626. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Erik W. Koster works
Medicare's Facility Affiliation Data lists Erik W. Koster 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
Practice locations
Addresses where Erik W. Koster is enrolled with Medicare (CMS data updated 2026-10-02).
- 2350 Meadows BlvdCastle Rock, CO 80109 (720) 455‑0650
- 2353 Meadows Blvd, Suite 300Castle Rock, CO 80109 (720) 455‑3750
- 2360 Meadows Blvd, Suite 300Castle Rock, CO 80109 (303) 715‑7106
- 2535 S Downing StDenver, CO 80210 (303) 778‑5797
- 7750 S Broadway, 260 South Denver NeurosurgeryLittleton, CO 80122 (303) 734‑8650
Group practices
Medicare enrollment lists Erik W. Koster as a member of this group (CMS data updated 2026-10-02).
- Portercare Adventist Health System774 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Castle Rock
Clinicians with the same Medicare primary specialty in Castle Rock, CO — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | R Franklin University Of Med & Sci/chicago Medical School |
| Graduation year | 2003 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1902843626 |
| 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