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

Dr. Themistoklis J Nissirios, MD

Individual provider Cardiovascular Disease Physician · NPI 1194925370

Dr. Themistoklis J Nissirios, MD is a Cardiovascular Disease (Cardiology) in Monroe, New York. Graduated from Rutgers R W Johnson Medical School (CAM/NEW Bruns/Pisc) in 2003, 23 years ago. Practices with Valley Physician Services PC, a 592-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
23
Trained at
Rutgers R W Johnson Medical School (CAM/NEW Bruns/Pisc)
Licensed in
NY
In the registry since
2007
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

855 State Route 17M
Monroe, NY 10950-1600
Phone: (845) 703-6999
Fax: (845) 703-6297
Show map & directions

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

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence 253483 (NY)

Record details

NPI number1194925370
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 25, 2007
Last updated in NPPESOctober 12, 2020
Certification dateOctober 12, 2020

Medicare enrollment

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

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Also practisesINTERNAL MEDICINE
Medical schoolRUTGERS R W JOHNSON MEDICAL SCHOOL (CAM/NEW BRUNS/PISC)
Graduated 2003 (23 years in practice)
Group practice Valley Physician Services Pc — 592 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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