Quick answers
- Where does Mallory R. Holzer see patients?
- Medicare's clinician data lists 2 practice locations, including Saint Louis, MO and Chesterfield, MO. Call before your visit to confirm the address.
- What is Mallory R. Holzer's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Mallory R. Holzer accept Medicare assignment?
- Yes. Medicare's clinician data says Mallory R. Holzer 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 Mallory R. Holzer?
- (314) 996-8080, as listed in official Medicare / NPI Registry data.
- What is Mallory R. Holzer's NPI number?
- 1265399653. 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 Mallory R. Holzer is enrolled with Medicare (CMS data updated 2026-10-02).
- 12634 Olive BlvdSaint Louis, MO 63141 (314) 996‑8080
- 14532 S Outer 40 Rd, Suite 200Chesterfield, MO 63017 (314) 514‑3500
Group practices
Medicare enrollment lists Mallory R. Holzer as a member of this group (CMS data updated 2026-10-02).
- Washington University3,029 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Saint Louis
Clinicians with the same Medicare primary specialty in Saint Louis, MO — not a recommendation.
Clinician information
| Medical school | Saint Louis University School Of Medicine |
|---|---|
| Graduation year | 2025 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1265399653 |
| 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