Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Dr. Mary F Landrigan-Ossar, MD, PHD

Individual provider Anesthesiology Physician · NPI 1487616850

Dr. Mary F Landrigan-Ossar, MD, PHD practises Anesthesiology in Boston, Massachusetts. Graduated from Icahn School of Medicine at Mount Sinai in 2000, 26 years ago. Practices with Chmc Anesthesia Foundation Inc, a 134-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
26
Trained at
Icahn School of Medicine at Mount Sinai
Licensed in
MA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

300 Longwood Ave
Boston, MA 02115-5724 Not confirmed with CMS for 19 years — call before visiting
Phone: (617) 355-7737
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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 223170 (MA)

Record details

NPI number1487616850
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD , PHD
Sole proprietorNo
NPI enumeratedApril 3, 2006
Last updated in NPPESAugust 21, 2007

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolICAHN SCHOOL OF MEDICINE AT MOUNT SINAI
Graduated 2000 (26 years in practice)
Group practice Chmc Anesthesia Foundation Inc — 134 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Colleagues at Chmc Anesthesia Foundation Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 134 clinicians in the practice; 12 are shown here.

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