Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.

Joseph Victor Zwirko, PA-C

Individual provider Physician Assistant · NPI 1346403037

Joseph Victor Zwirko, PA-C is a Physician Assistant in Springfield, Massachusetts. Qualified in 2008, 18 years ago. Practices with Northeast Orthopaedic Alliance PLLC, a 289-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
18
Licensed in
MA
In the registry since
2008
What do these letters mean?
PA-C — Physician Assistant, Certified
A physician assistant who holds current national certification.

See every abbreviation used in this directory →

Practice location Address checks out

300 Birnie Ave Ste 201
Springfield, MA 01107-1107
Phone: (413) 785-4666
Fax: (413) 846-4756
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Physician Assistant (primary) Taxonomy 363A00000X · Licence 2557 (MA)

Record details

NPI number1346403037
Entity typeIndividual (Type 1)
GenderMale
Credentials PA-C
Sole proprietorNo
NPI enumeratedJuly 3, 2008
Last updated in NPPESNovember 15, 2023
Certification dateNovember 15, 2023

Medicare enrollment

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

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolOTHER
Graduated 2008 (18 years in practice)
Group practice Northeast Orthopaedic Alliance Pllc — 289 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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 patients700
Services billed 8,341 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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.

Colleagues at Northeast Orthopaedic Alliance PLLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 289 clinicians in the practice; 12 are shown here.

Other providers in Springfield