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MARGARET KEELEY SCHREIBER
NPI 1346983061
Physician Assistant in Hagerstown, MD

Active since April 20, 2022PECOS Enrolled
201 E IRVIN AVE, HAGERSTOWN, MD 21742(240) 329-8699 Get Directions Write a Review

NPPES record last updated: April 24, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Apr 24, 2026, Aug 18, 2023, Apr 20, 2022 (3 updates tracked since 2022).

About Margaret Keeley Schreiber NPPES

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

MARGARET KEELEY SCHREIBER (NPI 1346983061) is an individual physician assistant in Hagerstown, Maryland, licensed in Maryland (C09004) and active in the NPI registry since April 2022. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1346983061
Entity TypeIndividualFemale
Primary Taxonomy363A00000X
Provider Legal NameMARGARET KEELEY SCHREIBER
Location Address201 E IRVIN AVEHagerstown, MD 21742-3401
Mailing Address201 E Irvin AveHagerstown, MD 21742-3401 · (240) 329-8699
Phone(240) 329-8699
Sole ProprietorYes
Enumeration DateApril 20, 2022
Last NPPES UpdateApril 24, 20263 updates tracked since enumeration
NPPES CertifiedApril 24, 2026
✔ NPI 1346983061 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
License✔ Licensed in MD · C09004
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.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
201 E IRVIN AVE, Hagerstown, MD 21742
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Other Names 1

Former Name (1)Margaret Keeley Murray

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Margaret Keeley Schreiber 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 4

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.
283 services276 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
156 services144 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.
70 services68 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
24 services24 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 21742 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
$89.75 typical visit price
range $57.99 – $175.57
Typical copayment $22.43 (range $14.49 – $43.89)
Most-billed visit code 99203
Established Patient
$72.23 typical visit price
range $18.66 – $143.02
Typical copayment $18.05 (range $4.66 – $35.75)
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.

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 Margaret Schreiber's NPI number?

The NPI number for Margaret Schreiber is 1346983061. It was assigned to this individual provider in the NPPES registry on April 20, 2022. The provider is also known as Margaret Keeley Murray.

Where is Margaret Schreiber located?

Margaret Schreiber practices at 201 E Irvin Ave, Hagerstown, MD 21742. The listed phone number is (240) 329-8699.

What is Margaret Schreiber's specialty?

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

Is Margaret Schreiber enrolled in Medicare?

Yes. Margaret Schreiber is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Margaret Schreiber was last updated on April 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.