Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Larissa Pirie Messenger, PA

Individual provider Medical Physician Assistant · NPI 1538402763

Larissa Pirie Messenger, PA is a Physician Assistant in Duluth, Minnesota. Qualified in 2013, 13 years ago. Practices with St Marys Medical Center, a 101-clinician group and accepts Medicare assignment. Licensed in Minnesota.

Years since qualifying
13
Licensed in
MN
In the registry since
2013
What do these letters mean?
PA — Physician Assistant
A licensed clinician who examines, diagnoses and treats under a physician's supervision.

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Practice location Address checks out

400 E 3rd St Essentia Health Duluth Clinic
Duluth, MN 55805-1951 Not confirmed with CMS for 11 years — call before visiting
Phone: (218) 786-8364
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Medical Physician Assistant (primary) Taxonomy 363AM0700X · Licence 11387 (MN)

Record details

NPI number1538402763
Entity typeIndividual (Type 1)
GenderFemale
Credentials PA
Sole proprietorNo
NPI enumeratedApril 6, 2013
Last updated in NPPESOctober 30, 2014

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolOTHER
Graduated 2013 (13 years in practice)
Group practice St Marys Medical Center — 101 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients117
Services billed 222 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at St Marys Medical Center

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 101 clinicians in the practice; 12 are shown here.

Other providers in Duluth