Quick answers
- Where does Mark R. Matthews see patients?
- Medicare's clinician data lists 3 practice locations, including Austin, TX, Houston, TX and Tucson, AZ. Call before your visit to confirm the address.
- What is Mark R. Matthews's specialty?
- Medicare lists Pathology as the primary specialty.
- Does Mark R. Matthews accept Medicare assignment?
- Yes. Medicare's clinician data says Mark R. Matthews 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 Mark R. Matthews?
- (877) 697-2447, as listed in official Medicare / NPI Registry data.
- What is Mark R. Matthews's NPI number?
- 1083694418. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Mark R. Matthews is enrolled with Medicare (CMS data updated 2026-10-02).
- 1033 La Posada Dr, Suite 365Austin, TX 78752 (877) 697‑2447
- 4131 Directors RowHouston, TX 77092 (877) 697‑2447
- 4582 N 1st Ave, Suite 120Tucson, AZ 85718 (877) 697‑2447
Group practices
Medicare enrollment lists Mark R. Matthews as a member of this group (CMS data updated 2026-10-02).
- Sagis PLLC29 clinicians in the group
Specialties
- Pathologyprimary
Other pathologists in Austin
Clinicians with the same Medicare primary specialty in Austin, TX — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Georgia School Of Medicine |
| Graduation year | 1994 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1083694418 |
| 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
- 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