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

Dr. Daniel Patrick O'Brien Jr., MD

Individual provider Gastroenterology Physician · NPI 1518132505

Dr. Daniel Patrick O'Brien Jr., MD is a Gastroenterology in Danbury, Connecticut. Qualified in 2008, 18 years ago. Practices with Nuvance Health Medical Practice CT Inc, a 741-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Connecticut.

Years since qualifying
18
Licensed in
CT
In the registry since
2008
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

111 Osborne St
Danbury, CT 06810-6043
Phone: (203) 739-7038
Fax: (203) 739-1961
Show map & directions

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

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 53019 (CT)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1518132505
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 29, 2008
Last updated in NPPESSeptember 9, 2014
Mailing address111 Osborne St, Suite 121, Danbury, CT 06810-6043

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2008 (18 years in practice)
Group practice Nuvance Health Medical Practice Ct Inc — 741 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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