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

Adam Seidner, MD

Individual provider Family Medicine Physician · NPI 1144208240

Adam Seidner, MD is registered under Family Practice in New London, Connecticut. Graduated from State University of Ny Upstate Medical University in 1988, 38 years ago. Practices with Middlesex Hospital, a 229-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Connecticut.

Years since qualifying
38
Trained at
State University of Ny Upstate Medical University
Licensed in
CT
In the registry since
2006
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

325 Montauk Ave
New London, CT 06320-4724 Not confirmed with CMS for 17 years — call before visiting
Phone: (860) 344-6300
Fax: (860) 344-9249
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 030901 (CT)
Occupational Medicine Physician Taxonomy 2083X0100X · Licence 030901 (CT)

Record details

NPI number1144208240
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 9, 2006
Last updated in NPPESAugust 13, 2009

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolSTATE UNIVERSITY OF NY UPSTATE MEDICAL UNIVERSITY
Graduated 1988 (38 years in practice)
Group practice Middlesex Hospital — 229 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Removal or shaving of skin growth 1–10 times
Skin biopsy 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 patients141
Services billed 259 a service is one billed item, such as a visit, a test or a procedure
Average patient age70

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 Middlesex Hospital

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 229 clinicians in the practice; 12 are shown here.

Other providers in New London