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

Individual provider Anesthesiology Physician · NPI 1457344574

John Mashikian, MD practises Anesthesiology in Brockton, Massachusetts. Graduated from State University of New York at Stony Brook, School of Medicine in 1990, 36 years ago. Practices with On Demand Anesthesia LLC, a 20-clinician group and accepts Medicare assignment. Licensed in Rhode Island.

Years since qualifying
36
Trained at
State University of New York at Stony Brook, School of Medicine
Licensed in
RI
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

680 Centre St
Brockton, MA 02302-3308 Not confirmed with CMS for 18 years — call before visiting
Phone: (401) 490-2130
Fax: (401) 435-2483
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence MD11923 (RI)

Record details

NPI number1457344574
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 24, 2005
Last updated in NPPESJune 25, 2008

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolSTATE UNIVERSITY OF NEW YORK AT STONY BROOK, SCHOOL OF MEDICINE
Graduated 1990 (36 years in practice)
Group practice On Demand Anesthesia Llc — 20 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 patients1,001
Services billed 1,014 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

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 On Demand Anesthesia LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 20 clinicians in the practice; 6 are shown here.

Other providers in Brockton