Quick answers
- Which hospitals does Matthew Byrnes work at?
- Medicare's official clinician data lists Matthew Byrnes at 5 hospitals: Allen Hospital, Catalina Island Medical Center, Lee County Community Hospital, Lonesome Pine Hospital and Northwest Texas Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Matthew Byrnes see patients?
- Medicare's clinician data lists 2 practice locations, including Avalon, CA and Big Stone Gap, VA. Call before your visit to confirm the address.
- What is Matthew Byrnes's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Matthew Byrnes accept Medicare assignment?
- Medicare's clinician data says Matthew Byrnes may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is the phone number for Matthew Byrnes?
- (310) 510-0700, as listed in official Medicare / NPI Registry data.
- What is Matthew Byrnes's NPI number?
- 1063545317. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Matthew Byrnes works
Medicare's Facility Affiliation Data lists Matthew Byrnes at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Allen HospitalWaterloo, IA · Acute Care Hospital · CCN 160110
- Catalina Island Medical CenterAvalon, CA · Critical Access Hospital · CCN 051307
- Lee County Community HospitalPennington Gap, VA · Critical Access Hospital · CCN 491309
- Lonesome Pine HospitalBig Stone Gap, VA · Acute Care Hospital · CCN 490114
- Northwest Texas HospitalAmarillo, TX · Acute Care Hospital · CCN 450209
Practice locations
Addresses where Matthew Byrnes is enrolled with Medicare (CMS data updated 2026-10-02).
- 100 Falls Canyon RdAvalon, CA 90704 (310) 510‑0700
- 1990 Holton Ave EBig Stone Gap, VA 24219 (276) 523‑3111
Group practices
Medicare enrollment lists Matthew Byrnes as a member of these groups (CMS data updated 2026-10-02).
- Western Virginia Regional Emergency Physicians LLC91 clinicians in the group
- Avalon Medical Development Corporation30 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Avalon
Clinicians with the same Medicare primary specialty in Avalon, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2001 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1063545317 |
| 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