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

Michael O'Neill, MD

Individual provider Hospitalist Physician · NPI 1356873319

Michael O'Neill, MD is a Hospitalist in Fairfield, Connecticut. Qualified in 2017, 9 years ago. Practices with Hartford Healthcare Medical Group Specialists PLLC, a 1,537-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Connecticut and New York.

Years since qualifying
9
Licensed in
CT, NY
In the registry since
2017
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

111 Beach Rd
Fairfield, CT 06824-6668
Phone: (203) 696-3560
Fax: (203) 696-3563
Show map & directions

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 66914 (CT)
Hospitalist Physician Taxonomy 208M00000X · Licence 305546 (NY)
Hospitalist Physician Taxonomy 208M00000X · Licence 66914 (CT)

Record details

NPI number1356873319
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 29, 2017
Last updated in NPPESJune 25, 2025
Certification dateJune 25, 2025
Mailing address111 Beach Rd, Fairfield, CT 06824-6668

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2017 (9 years in practice)
Group practice Hartford Healthcare Medical Group Specialists Pllc — 1537 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations5 on file with Medicare

Other providers in Fairfield