MARISSA WEIR PA-C
NPI 1073406948
Physician Assistant - Medical in Latrobe, PA

Q: What is Marissa Weir's NPI number?

The NPI number for Marissa Weir is 1073406948. It was assigned to this individual provider in the NPPES registry on May 30, 2025.

Q: What is Marissa Weir's specialty?

The primary specialty registered for this NPI is Physician Assistant, specializing in Medical, with taxonomy code 363AM0700X.

Q: When was this NPI record last updated?

The NPPES record for Marissa Weir was last updated on March 4, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.

Active since May 30, 2025PECOS EnrolledAccepts Medicare Assignment

1 MELLON WAY, LATROBE, PA 15650(724) 539-3555 Get Directions Write a Review

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

Record update history: Mar 4, 2026, Sep 2, 2025, May 30, 2025 (3 updates tracked since 2025).

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About Marissa Weir Pa-c NPPES

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

MARISSA WEIR PA-C (NPI 1073406948) is an individual medical provider in Latrobe, Pennsylvania, licensed in Pennsylvania (MA066480) and active in the NPI registry since May 2025. She is enrolled in Medicare PECOS, is affiliated with Excela Health Westmoreland Regional Hospital, and is a graduate of Other (2024).

NPPES Registry Identity

NPI1073406948

Entity TypeIndividualFemale

Primary Taxonomy363AM0700X

Provider Legal NameMARISSA WEIRCredential: PA-C

Location Address1 MELLON WAYLatrobe, PA 15650-1197

Mailing Address1500 Fitzgerald CtGreensburg, PA 15601-9074 · (724) 989-8342

Phone(724) 539-3555

Sole ProprietorYes

Medical School CMSOtherGraduated 2024

Enumeration DateMay 30, 2025

Last NPPES UpdateMarch 4, 20263 updates tracked since enumeration

NPPES CertifiedMarch 4, 2026

✔ NPI 1073406948 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician Assistant · MedicalPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363AM0700X

License✔ Licensed in PA · MA066480

1 MELLON WAY, Latrobe, PA 15650

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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 and accepts Medicare assignment

Marissa Weir Pa-c is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID941716047

PECOS Enrollment IDI20250723003813

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.

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Excela Health Westmoreland Regional Hospital

Acute Care Hospitals · Greensburg, PA

3/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number390145

Location532 West Pittsburgh StreetGreensburg, PA 15601 · Westmoreland County

Emergency services Birthing friendly

Excela Health - Frick Hospital

Acute Care Hospitals · Mount Pleasant, PA

OwnershipVoluntary non-profit - Other

CMS Certification Number390217

Location508 South Church StreetMount Pleasant, PA 15666 · Westmoreland County

Emergency services

Excela Health Latrobe Hospital

Acute Care Hospitals · Latrobe, PA

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number390219

LocationOne Mellon WayLatrobe, PA 15650 · Westmoreland County

Emergency services

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.

JACOB EDWARD OSLOSKY DO

Family Medicine