Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Johanna M O'Connor, MD

Individual provider Anesthesiology Physician · NPI 1558471961

Johanna M O'Connor, MD is an Anesthesiology in Westwood, Massachusetts. Qualified in 1993, 33 years ago. Practices with Mass General Brigham Medical Group, Inc, a 140-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
33
Licensed in
MA
In the registry since
2006
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

690 Canton St Ste 325
Westwood, MA 02090-2321
Phone: (781) 407-7713
Fax: (781) 407-0998
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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 203472 (MA)

Record details

NPI number1558471961
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 30, 2006
Last updated in NPPESDecember 4, 2007

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolOTHER
Graduated 1993 (33 years in practice)
Group practice Mass General Brigham Medical Group, Inc. — 140 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Other providers in Westwood