Quick answers
- Which hospitals does William R. Shaffer work at?
- Medicare's official clinician data lists William R. Shaffer at 3 hospitals: Boulder Community Health, Longs Peak Hospital and Medical Center of the Rockies. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William R. Shaffer see patients?
- Medicare's clinician data lists 1 practice location in Boulder, CO. Call before your visit to confirm the address.
- What is William R. Shaffer's specialty?
- Medicare lists Neurology as the primary specialty.
- Does William R. Shaffer accept Medicare assignment?
- Yes. Medicare's clinician data says William R. Shaffer 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 William R. Shaffer?
- (303) 415-8800, as listed in official Medicare / NPI Registry data.
- What is William R. Shaffer's NPI number?
- 1801044722. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where William R. Shaffer works
Medicare's Facility Affiliation Data lists William R. Shaffer at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Boulder Community HealthBoulder, CO · Acute Care Hospital · CCN 060027
- Longs Peak HospitalLongmont, CO · Acute Care Hospital · CCN 060128
- Medical Center of the RockiesLoveland, CO · Acute Care Hospital · CCN 060119
Practice locations
Addresses where William R. Shaffer is enrolled with Medicare (CMS data updated 2026-10-02).
- 4801 Riverbend Rd, Suite 200Boulder, CO 80301 (303) 415‑8800
Group practices
Medicare enrollment lists William R. Shaffer as a member of this group (CMS data updated 2026-10-02).
- Boulder Community Health264 clinicians in the group
Specialties
- Neurologyprimary
Other neurologists in Colorado
Clinicians with the same Medicare primary specialty in Colorado — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2004 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1801044722 |
| 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