Quick answers
- Which hospitals does Marissa Peyer work at?
- Medicare's official clinician data lists Marissa Peyer at 1 hospital: UT of Texas Southwestern University Hospital - William P. Clements Jr.. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Marissa Peyer see patients?
- Medicare's clinician data lists 2 practice locations, including Dallas, TX. Call before your visit to confirm the address.
- What is Marissa Peyer's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Marissa Peyer accept Medicare assignment?
- Yes. Medicare's clinician data says Marissa Peyer 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 Marissa Peyer?
- (214) 590-8000, as listed in official Medicare / NPI Registry data.
- What is Marissa Peyer's NPI number?
- 1013666353. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Marissa Peyer works
Medicare's Facility Affiliation Data lists Marissa Peyer at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- UT of Texas Southwestern University Hospital - William P. Clements Jr.Dallas, TX · Acute Care Hospital · CCN 450044
Practice locations
Addresses where Marissa Peyer is enrolled with Medicare (CMS data updated 2026-10-02).
- 5200 Harry Hines BlvdDallas, TX 75235 (214) 590‑8000
- 6201 Harry Hines BlvdDallas, TX 75235 (214) 633‑5555
Group practices
Medicare enrollment lists Marissa Peyer as a member of this group (CMS data updated 2026-10-02).
- University of Texas Southwestern Medical Center at Dallas3,187 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Dallas
Clinicians with the same Medicare primary specialty in Dallas, TX — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2022 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1013666353 |
| 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