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

Dr. Athos John Rassias, MD

Individual provider Anesthesiology Physician · NPI 1609961119

Dr. Athos John Rassias, MD practises Anesthesiology in Lebanon, New Hampshire. Graduated from Warren Alpert Medical School of Brown University in 1989, 37 years ago. Practices with Dartmouth-Hitchcock Clinic, a 1,430-clinician group and accepts Medicare assignment. Licensed in New Hampshire.

Years since qualifying
37
Trained at
Warren Alpert Medical School of Brown University
Licensed in
NH
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

Critical Care Medicine 1 Medical Center Drive Dhmc
Lebanon, NH 03756
Phone: (603) 650-4642
Fax: (603) 650-0614
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Critical Care Medicine (Anesthesiology) Physician (primary) Taxonomy 207LC0200X · Licence 9258 (NH)
Anesthesiology Physician Taxonomy 207L00000X · Licence 9258 (NH)

Record details

NPI number1609961119
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedOctober 3, 2006
Last updated in NPPESSeptember 11, 2025

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolWARREN ALPERT MEDICAL SCHOOL OF BROWN UNIVERSITY
Graduated 1989 (37 years in practice)
Group practice Dartmouth-Hitchcock Clinic — 1430 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 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.

Pacemaker insertion or repair 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 patients216
Services billed 416 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

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