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

John J. O'Connor Jr., MD

Individual provider Anesthesiology Physician · NPI 1295988921

John J. O'Connor Jr., MD is an Anesthesiology in Worcester, Massachusetts. Qualified in 2005, 21 years ago. Practices with Coastal Medical Associates, a 446-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
21
Licensed in
MA
In the registry since
2008
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

55 Lake Ave N Dept OF Anesthesiology
Worcester, MA 01655-0002
Phone: (508) 334-3271
Fax: (508) 856-5911
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence 238964 (MA)

Record details

NPI number1295988921
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 26, 2008
Last updated in NPPESOctober 8, 2009
Mailing addressPo Box 415348, Boston, MA 02241-5348

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Also practisesCRITICAL CARE (INTENSIVISTS)
Medical schoolOTHER
Graduated 2005 (21 years in practice)
Group practice Coastal Medical Associates — 446 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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