Quick answers
- Which hospitals does William B. Messer work at?
- Medicare's official clinician data lists William B. Messer at 2 hospitals: Hillsboro Medical Center and OHSU Hospital and Clinics. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William B. Messer see patients?
- Medicare's clinician data lists 3 practice locations, including Beaverton, OR, Portland, OR and Hillsboro, OR. Call before your visit to confirm the address.
- What is William B. Messer's specialty?
- Medicare lists Infectious Disease as the primary specialty.
- Does William B. Messer accept Medicare assignment?
- Yes. Medicare's clinician data says William B. Messer 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 B. Messer?
- (503) 494-8311, as listed in official Medicare / NPI Registry data.
- What is William B. Messer's NPI number?
- 1508085739. 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 B. Messer works
Medicare's Facility Affiliation Data lists William B. Messer at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Hillsboro Medical CenterHillsboro, OR · Acute Care Hospital · CCN 380021
- OHSU Hospital and ClinicsPortland, OR · Acute Care Hospital · CCN 380009
Practice locations
Addresses where William B. Messer is enrolled with Medicare (CMS data updated 2026-10-02).
- 15700 SW Greystone CtBeaverton, OR 97006
- 3181 SW Sam Jackson Park RdPortland, OR 97239 (503) 494‑8311
- 335 SE 8th AveHillsboro, OR 97123 (503) 681‑1111
Group practices
Medicare enrollment lists William B. Messer as a member of these groups (CMS data updated 2026-10-02).
- University Professional Services1,724 clinicians in the group
- Tuality Medical Group LLC297 clinicians in the group
Specialties
- Infectious Diseaseprimary
Other infectious disease doctors in Beaverton
Clinicians with the same Medicare primary specialty in Beaverton, OR — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of North Carolina At Chapel Hill School Of Medicine |
| Graduation year | 2006 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1508085739 |
| 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