Quick answers
- Which hospitals does Guy P. Van Der Werf work at?
- Medicare's official clinician data lists Guy P. Van Der Werf at 3 hospitals: Estes Park Medical Center, Medical Center of the Rockies and Poudre Valley Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Guy P. Van Der Werf see patients?
- Medicare's clinician data lists 1 practice location in Estes Park, CO. Call before your visit to confirm the address.
- What is Guy P. Van Der Werf's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Guy P. Van Der Werf accept Medicare assignment?
- Yes. Medicare's clinician data says Guy P. Van Der Werf 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.
- Does Guy P. Van Der Werf offer telehealth?
- Medicare's clinician data says Guy P. Van Der Werf offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Guy P. Van Der Werf?
- (970) 586-2343, as listed in official Medicare / NPI Registry data.
- What is Guy P. Van Der Werf's NPI number?
- 1538154257. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Guy P. Van Der Werf works
Medicare's Facility Affiliation Data lists Guy P. Van Der Werf at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Estes Park Medical CenterEstes Park, CO · Critical Access Hospital · CCN 061312
- Medical Center of the RockiesLoveland, CO · Acute Care Hospital · CCN 060119
- Poudre Valley HospitalFort Collins, CO · Acute Care Hospital · CCN 060010
Practice locations
Addresses where Guy P. Van Der Werf is enrolled with Medicare (CMS data updated 2026-10-02).
- 131 Stanley Ave, Suite 202Estes Park, CO 80517 (970) 586‑2343
Group practices
Medicare enrollment lists Guy P. Van Der Werf as a member of this group (CMS data updated 2026-10-02).
- Poudre Valley Medical Group LLC2,440 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Estes Park
Clinicians with the same Medicare primary specialty in Estes Park, CO — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Arizona College Of Medicine |
| Graduation year | 1987 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1538154257 |
| 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