Mallory Rose Holzer, PA
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2026
- Practice address
- 14532 S Outer 40 Rd Dept Of Anesthesiology, Chesterfield, MO 63017-5705
- Practice phone
- Call (314) 514-3500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Washington University - Chesterfield (S Outer 40 Rd)
Multi-specialty group site · Chesterfield, Missouri
Find Mallory Holzer's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Mallory Rose Holzer is a physician assistant in Chesterfield, Missouri
Mallory Holzer practices at Washington University - Chesterfield (S Outer 40 Rd) in Chesterfield, Missouri.
Mallory Holzer's NPI, 1265399653, was assigned on January 7, 2026. Mallory Holzer holds Missouri license 2026005852.
- NPI
- 1265399653NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9739661810
- NPI enumeration date
- January 7, 2026
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (314) 514-3500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Mallory Rose Holzer practices at Washington University - Chesterfield (S Outer 40 Rd) in Chesterfield, Missouri
Mallory Holzer's primary practice is Washington University - Chesterfield (S Outer 40 Rd), at 14532 S Outer 40 Rd Dept Of Anesthesiology, Chesterfield, MO 63017-5705. The practice phone is (314) 514-3500.
- Washington University - Chesterfield (S Outer 40 Rd)14532 S Outer 40 Rd Dept Of Anesthesiology, Chesterfield, MO 63017-5705Phone(314) 514-3500
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Mallory Rose Holzer is affiliated with 1 site of care and 1 medical group
Mallory Holzer's primary practice is Washington University - Chesterfield (S Outer 40 Rd) in Chesterfield, Missouri. The medical group on file is WashU Medicine Psychiatry.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Mallory Rose Holzer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Mallory Holzer practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Washington University - Chesterfield (S Outer 40 Rd) | Available with a free account |
Source: Dmand AI Technology Install Data
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Mallory Rose Holzer is one of 1,484 physician assistants in Missouri
Physician assistant is Mallory Holzer's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Mallory Holzer is licensed in Missouri.
Specialties and state licenses
- Physician assistant, MissouriPrimary
Physician assistants near Mallory Holzer
Counts of physician assistants with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
How Mallory Rose Holzer takes part in Medicare
Mallory Holzer accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
Sources for Mallory Rose Holzer's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Mallory Rose Holzer
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Mallory Rose Holzer's NPI number?
Mallory Rose Holzer's NPI number is 1265399653. It was assigned on January 7, 2026, and it is active in the NPI Registry.
What does Mallory Rose Holzer specialize in?
Mallory Rose Holzer is a physician assistant in Chesterfield, Missouri. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Mallory Rose Holzer practice?
Mallory Holzer practices at 14532 S Outer 40 Rd Dept Of Anesthesiology, Chesterfield, MO 63017-5705. Mallory Holzer's primary practice is Washington University - Chesterfield (S Outer 40 Rd) in Chesterfield, Missouri.
What is Mallory Rose Holzer's office phone number?
The practice phone on file for Mallory Holzer is (314) 514-3500.
What is Mallory Rose Holzer's medical license number?
Mallory Holzer holds Missouri license 2026005852.
What medical group is Mallory Rose Holzer part of?
Mallory Holzer is linked to WashU Medicine Psychiatry.
Does Mallory Rose Holzer accept Medicare?
Yes. CMS lists Mallory Holzer as accepting Medicare assignment.
How long has Mallory Rose Holzer been practicing?
Mallory Holzer's NPI was assigned in 2026.
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