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

Dr. John Gemery

Individual provider Vascular & Interventional Radiology Physician · NPI 1811921836

Dr. John Gemery practises Interventional Radiology in Lebanon, New Hampshire. Graduated from University of Vermont College of Medicine in 1992, 34 years ago. Practices with Dartmouth-Hitchcock Clinic, a 1,430-clinician group, accepts Medicare assignment and offers telehealth. Licensed in New Hampshire.

Years since qualifying
34
Trained at
University of Vermont College of Medicine
Licensed in
NH
In the registry since
2006
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Practice location Address checks out

1 Medical Center Dr Dept OF Radiology
Lebanon, NH 03756-1000 Not confirmed with CMS for 15 years — call before visiting
Phone: (603) 650-7230
Fax: (603) 650-5455
Show map & directions

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

Specialties & licences

Vascular & Interventional Radiology Physician (primary) Taxonomy 2085R0204X · Licence 10387 (NH)

Record details

NPI number1811921836
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedJuly 10, 2006
Last updated in NPPESJuly 19, 2011

Medicare enrollment

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

Medicare specialtyINTERVENTIONAL RADIOLOGY
Also practisesDIAGNOSTIC RADIOLOGY
Medical schoolUNIVERSITY OF VERMONT COLLEGE OF MEDICINE
Graduated 1992 (34 years in practice)
Group practice Dartmouth-Hitchcock Clinic — 1430 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.

Upper gastrointestinal (GI) endoscopy for acid reflux 1–10 times
Varicose vein removal 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 patients378
Services billed 918 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

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 Dartmouth-Hitchcock Clinic

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1430 clinicians in the practice; 12 are shown here.

Other providers in Lebanon