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

Nikolaos Vassiliou, MD

Individual provider Family Medicine Physician · NPI 1851554349

Nikolaos Vassiliou, MD is registered under Family Practice in Cromwell, Connecticut. Graduated from University of Connecticut School of Medicine in 2008, 18 years ago. Practices with Mhs Primary Care, Inc, a 177-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Connecticut.

Years since qualifying
18
Trained at
University of Connecticut School of Medicine
Licensed in
CT
In the registry since
2008
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

70 Shunpike Rd
Cromwell, CT 06416
Phone: (860) 358-5280
Fax: (860) 358-8650
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 050996 (CT)

Record details

NPI number1851554349
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 7, 2008
Last updated in NPPESNovember 5, 2025
Certification dateNovember 5, 2025

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolUNIVERSITY OF CONNECTICUT SCHOOL OF MEDICINE
Graduated 2008 (18 years in practice)
Group practice Mhs Primary Care, Inc. — 177 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 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 patients93
Services billed 390 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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. Those with a page here are linked.

  • Middlesex Hospital Hospital · Middletown, CT
  • Middlesex Health Care At Home And Hospice Program Home health agency · Middletown, CT

Colleagues at Mhs Primary Care, Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 177 clinicians in the practice; 12 are shown here.

Other providers in Cromwell