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

Heather I Frimmer, MD

Individual provider Diagnostic Radiology Physician · NPI 1003897687

Heather I Frimmer, MD practises Diagnostic Radiology in Norwalk, Connecticut. Graduated from Js Weill Medical College, Cornell University in 2000, 26 years ago. Practices with Main Street Radiology at Bayside LLC, a 56-clinician group and accepts Medicare assignment. Licensed in Connecticut and New York.

Years since qualifying
26
Trained at
Js Weill Medical College, Cornell University
Licensed in
CT, NY
In the registry since
2005
Specialties on file
2
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

148 E Ave
Norwalk, CT 06851-5721
Phone: (203) 852-9913
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence 222220 (NY)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence 043027 (CT)

Record details

NPI number1003897687
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 9, 2005
Last updated in NPPESJanuary 17, 2024
Certification dateJanuary 17, 2024

Medicare enrollment

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

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolJS WEILL MEDICAL COLLEGE, CORNELL UNIVERSITY
Graduated 2000 (26 years in practice)
Group practice Main Street Radiology At Bayside Llc — 56 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations8 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 patients1,208
Services billed 7,316 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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.

Colleagues at Main Street Radiology at Bayside LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 56 clinicians in the practice; 11 are shown here.

Other providers in Norwalk