ROSEMARY JOY LARSON PA-C
NPI 1851286363
Physician Assistant in Springfield, MA

Q: What is Rosemary Larson's NPI number?

The NPI number for Rosemary Larson is 1851286363. It was assigned to this individual provider in the NPPES registry on June 12, 2025.

Q: What is Rosemary Larson's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Rosemary Larson was last updated on July 10, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.

Active since June 12, 2025PECOS EnrolledAccepts Medicare Assignment

100 WASON AVE STE 100, SPRINGFIELD, MA 01107(413) 732-7426(413) 734-2371 Get Directions Write a Review

NPPES record last updated: July 10, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jul 10, 2025, Jun 12, 2025 (2 updates tracked since 2025).

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About Rosemary Joy Larson Pa-c NPPES

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

ROSEMARY JOY LARSON PA-C (NPI 1851286363) is an individual physician assistant in Springfield, Massachusetts, licensed in Massachusetts (PA101842) and active in the NPI registry since June 2025. She is enrolled in Medicare PECOS, is affiliated with Cooley Dickinson Hospital Inc,the, and maintains a secondary practice location in Uxbridge.

NPPES Registry Identity

NPI1851286363

Entity TypeIndividualFemale

Primary Taxonomy363A00000X

Provider Legal NameROSEMARY JOY LARSONCredential: PA-C

Location Address100 WASON AVE STE 100Springfield, MA 01107-1299

Mailing Address14 Maple StUxbridge, MA 01569-1299 · (508) 375-8043

Phone(413) 732-7426

Fax(413) 734-2371

Sole ProprietorNo

Medical School CMSOtherGraduated 2025

Enumeration DateJune 12, 2025

Last NPPES UpdateJuly 10, 20252 updates tracked since enumeration

NPPES CertifiedJuly 10, 2025

✔ NPI 1851286363 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 MA · PA101842

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.

100 WASON AVE STE 100, Springfield, MA 01107

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Secondary Practice Location 1

Location 114 Maple StUxbridge, MA 01569-1299 · Phone (508) 375-8043

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

Rosemary Joy Larson 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 ID7214442342

PECOS Enrollment IDI20250716002880

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.

Cooley Dickinson Hospital Inc,the

Acute Care Hospitals · Northampton, MA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220015

Location30 Locust StreetNorthampton, MA 01060 · Hampshire County

Emergency services Birthing friendly

Mercy Medical Ctr

Acute Care Hospitals · Springfield, MA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220066

Location271 Carew StreetSpringfield, MA 01104 · Hampden County

Emergency services Birthing friendly

Baystate Medical Center

Acute Care Hospitals · Springfield, MA

1/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220077

Location759 Chestnut StreetSpringfield, MA 01199 · Hampden County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 01107 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

$90.70 typical visit price

range $58.86 – $177.36

Typical copayment $22.67 (range $14.71 – $44.34)

Most-billed visit code 99203

Established Patient

$73.22 typical visit price

range $19.11 – $144.84

Typical copayment $18.30 (range $4.77 – $36.21)

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 8

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JENNIFER PHAM PA-C

Physician Assistant