Mallory Holzer, PA
NPI 1265399653 · Physician Assistant · Chesterfield, MO
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mallory Holzer, PA is a Physician Assistant provider in Chesterfield, MO (NPI 1265399653).
Provider details
- NPI number
- 1265399653
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA
- Sex
- Female
- Sole proprietor
- No
- License
- 2026005852 (MO)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
Under 1 yr in registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2026-01-07
- Last updated
- 2026-03-17
- Certified
- 2026-01-07
Frequently asked questions
- What is Mallory Holzer's NPI number?
- Mallory Holzer's National Provider Identifier (NPI) is 1265399653, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mallory Holzer's specialty?
- Mallory Holzer is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mallory Holzer located?
- Mallory Holzer's practice location on file with NPPES is 14532 S Outer 40 Rd, Chesterfield, MO 63017-5705.
- What is Mallory Holzer's phone number?
- The practice phone number listed in the NPPES registry for Mallory Holzer is (314) 514-3500.
- Does Mallory Holzer accept Medicare?
- Mallory Holzer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mallory Holzer's NPI active?
- Yes — Mallory Holzer's NPI (1265399653) is active in the NPPES registry as of the last update on 2026-03-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.