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

John F O'Brien, APRN

Individual provider Certified Registered Nurse Anesthetist · NPI 1043336258

John F O'Brien, APRN is a Certified Registered Nurse Anesthetist (CRNA) in Danbury, Connecticut. Qualified in 2006, 20 years ago. Practices with Woodland Anesthesia Associates PC, a 173-clinician group and accepts Medicare assignment. Licensed in Connecticut.

Years since qualifying
20
Licensed in
CT
In the registry since
2007
What do these letters mean?
APRN — Advanced Practice Registered Nurse
The umbrella licence covering nurse practitioners, midwives, anaesthetists and clinical nurse specialists.

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Practice location Address checks out

24 Hospital Ave
Danbury, CT 06810-6099
Phone: (203) 797-7118
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Certified Registered Nurse Anesthetist (primary) Taxonomy 367500000X · Licence 003588 (CT)

Record details

NPI number1043336258
Entity typeIndividual (Type 1)
GenderMale
Credentials APRN
Sole proprietorNo
NPI enumeratedMarch 21, 2007
Last updated in NPPESJuly 8, 2007

Medicare enrollment

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

Medicare specialtyCERTIFIED REGISTERED NURSE ANESTHETIST (CRNA)
Medical schoolOTHER
Graduated 2006 (20 years in practice)
Group practice Woodland Anesthesia Associates Pc — 173 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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