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MS. MAMIE E AMBROSCH PA
NPI 1841903101
Physician Assistant in Saint Louis, MO

Active since January 03, 2023PECOS Enrolled
1 BARNES JEWISH HOSPITAL PLZ, DEPT EMERGENCY MED, SAINT LOUIS, MO 63110(314) 362-9123(314) 362-0478 Get Directions Write a Review

NPPES record last updated: May 4, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: May 4, 2026, Apr 25, 2024, Apr 10, 2024 and 1 more (4 updates tracked since 2023).

About Ms. Mamie E Ambrosch Pa NPPES

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

MS. MAMIE E AMBROSCH PA (NPI 1841903101) is an individual physician assistant in Saint Louis, Missouri, licensed in Missouri (2024006180) and active in the NPI registry since January 2023. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1841903101
Entity TypeIndividualFemale
Primary Taxonomy363A00000X
Provider Legal NameMS. MAMIE E AMBROSCHCredential: PA
Location Address1 BARNES JEWISH HOSPITAL PLZ, DEPT EMERGENCY MEDSaint Louis, MO 63110-1003
Mailing AddressPo Box 7412011Chicago, IL 60674-2011 · (314) 362-9123 · Fax (314) 362-0478
Phone(314) 362-9123
Fax(314) 362-0478
Sole ProprietorNo
Enumeration DateJanuary 3, 2023
Last NPPES UpdateMay 4, 20264 updates tracked since enumeration
NPPES CertifiedJanuary 3, 2023
✔ NPI 1841903101 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 · 2024006180
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.
1 BARNES JEWISH HOSPITAL PLZ, Saint Louis, MO 63110
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Other Identifiers 1

Medicaid220137352MO

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. Mamie E Ambrosch Pa is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
58 services54 patients
Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
53 services50 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63110 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.

DR. MARGARET LEIGHTON MCNAIRY MD
Hospitalist
1 BARNES JEWISH HOSPITAL PLZ, DIV IM HOSPITALIST
SAINT LOUIS, MO 63110
St. Louis City (314) 362-1700
ANNA RABINOV ANNA RABINOV
Obstetrics & Gynecology
1 BARNES JEWISH HOSPITAL PLZ
SAINT LOUIS, MO 63110
St. Louis City (314) 747-3000
MRS. MICHELLE MARIE BLOOM ACNP
Nurse Practitioner (Acute Care)
1 BARNES JEWISH HOSPITAL PLZ, DEPT ANESTHESIOLOGY
SAINT LOUIS, MO 63110
St. Louis City (800) 862-9980
DR. FARIS ADAM BAKEER MD
Hospitalist
1 BARNES JEWISH HOSPITAL PLZ, DIV IM HOSPITALIST
SAINT LOUIS, MO 63110
St. Louis City (314) 362-1700
DR. REHAN RAIS MD
Hospitalist
1 BARNES JEWISH HOSPITAL PLZ, DIV IM HOSPITALIST
SAINT LOUIS, MO 63110
St. Louis City (314) 362-1700
DR. RANDY OLIVIER LAINE MD
Hospitalist
1 BARNES JEWISH HOSPITAL PLZ, DIV IM HOSPITALIST
SAINT LOUIS, MO 63110
St. Louis City (314) 362-1700
DR. BRADLEY SETH KUSHNER MD
Surgery
1 BARNES JEWISH HOSPITAL PLZ, DIV SURG VASCULAR
SAINT LOUIS, MO 63110
St. Louis City (314) 273-7373
MS. KELSEY ELISE FOGUS CRNA
Nurse Anesthetist, Certified Registered
1 BARNES JEWISH HOSPITAL PLZ, DEPT ANESTHESIOLOGY
SAINT LOUIS, MO 63110
St. Louis City (800) 862-9980

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 Mamie Ambrosch's NPI number?

The NPI number for Mamie Ambrosch is 1841903101. It was assigned to this individual provider in the NPPES registry on January 3, 2023.

Where is Mamie Ambrosch located?

Mamie Ambrosch practices at 1 Barnes Jewish Hospital Plz Dept Emergency Med, Saint Louis, MO 63110. The listed phone number is (314) 362-9123.

What is Mamie Ambrosch's specialty?

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

Is Mamie Ambrosch enrolled in Medicare?

Yes. Mamie Ambrosch is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Mamie Ambrosch was last updated on May 4, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.