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MS. MALLORY ROSE HOLZER PA
NPI 1265399653
Physician Assistant in Chesterfield, MO

Active since January 07, 2026PECOS Enrolled
14532 S OUTER 40 RD, DEPT ORTHOPAEDIC SURGERY, STE 200, CHESTERFIELD, MO 63017(314) 514-3500(314) 878-7678 Get Directions Write a Review

NPPES record last updated: March 17, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Mar 17, 2026, Jan 7, 2026 (2 updates tracked since 2026).

About Ms. Mallory Rose Holzer Pa NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MS. MALLORY ROSE HOLZER PA (NPI 1265399653) is an individual physician assistant in Chesterfield, Missouri, licensed in Missouri (2026005852) and active in the NPI registry since January 2026. She is enrolled in Medicare PECOS and is a graduate of Saint Louis University School Of Medicine (2025).

NPPES Registry Identity

NPI1265399653
Entity TypeIndividualFemale
Primary Taxonomy363A00000X
Provider Legal NameMS. MALLORY ROSE HOLZERCredential: PA
Location Address14532 S OUTER 40 RD, DEPT ORTHOPAEDIC SURGERY, STE 200Chesterfield, MO 63017-5705
Mailing AddressPo Box 7412011Chicago, IL 60674-2011 · (314) 514-3500 · Fax (314) 878-7678
Phone(314) 514-3500
Fax(314) 878-7678
Sole ProprietorNo
Medical School CMSSaint Louis University School Of MedicineGraduated 2025
Enumeration DateJanuary 7, 2026
Last NPPES UpdateMarch 17, 20262 updates tracked since enumeration
NPPES CertifiedJanuary 7, 2026
✔ NPI 1265399653 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
License✔ Licensed in MO · 2026005852
Definition
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
14532 S OUTER 40 RD, Chesterfield, MO 63017
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ms. Mallory Rose Holzer Pa is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID9739661810
PECOS Enrollment IDI20260306002603
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63017 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$86.32 typical visit price
range $55.65 – $169.38
Typical copayment $21.58 (range $13.91 – $42.34)
Most-billed visit code 99203
Established Patient
$69.50 typical visit price
range $17.76 – $137.92
Typical copayment $17.37 (range $4.44 – $34.48)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MS. EMILY G PITASSI OT
Occupational Therapist
14532 S OUTER 40 RD, DEPT OCCUPATIONAL THERAPY, STE 120
CHESTERFIELD, MO 63017
St. Louis County (314) 286-1669
MS. LUU THI WONG OT
Occupational Therapist (Hand)
14532 S OUTER 40 RD, DEPT OCCUPATIONAL THERAPY, STE 120
CHESTERFIELD, MO 63017
St. Louis County (314) 286-1669
MR. MICHAEL ALLAN RAETHKA PA
Physician Assistant
14532 S OUTER 40 RD, DEPT ORTHOPAEDIC SURGERY, STE 200
CHESTERFIELD, MO 63017
St. Louis County (314) 514-3500
NADIA MELTON ATC LAT
Specialist/Technologist (Athletic Trainer)
14532 S OUTER 40 RD
CHESTERFIELD, MO 63017
St. Louis County (314) 514-3500
JESSICA MARIE KEYSER
Specialist/Technologist (Athletic Trainer)
14532 S OUTER 40 RD
CHESTERFIELD, MO 63017
St. Louis County (816) 500-4421
DR. LINDLEY B WALL MD
Orthopaedic Surgery (Pediatric Orthopaedic Surgery)
14532 S OUTER 40 RD, DEPT ORTHOPAEDIC SURGERY, STE 200
CHESTERFIELD, MO 63017
St. Louis County (314) 514-3500
MS. KYMBERLY L GOMEZ PA
Physician Assistant
14532 S OUTER 40 RD, DEPT ORTHOPAEDIC SURGERY, STE 200
CHESTERFIELD, MO 63017
St. Louis County (314) 514-3500
MS. MADELYN MORGAN TEGERDINE PA
Physician Assistant
14532 S OUTER 40 RD, DEPT ORTHOPAEDIC SURGERY, STE 200
CHESTERFIELD, MO 63017
St. Louis County (314) 514-3500

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mallory Holzer's NPI number?

The NPI number for Mallory Holzer is 1265399653. It was assigned to this individual provider in the NPPES registry on January 7, 2026.

Where is Mallory Holzer located?

Mallory Holzer practices at 14532 S Outer 40 Rd Dept Orthopaedic Surgery, Ste 200, Chesterfield, MO 63017. The listed phone number is (314) 514-3500.

What is Mallory Holzer's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Is Mallory Holzer enrolled in Medicare?

Yes. Mallory Holzer is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Mallory Holzer was last updated on March 17, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.