Mary F. Landrigan-Ossar, MD, PHD
Anesthesiology Physician · Boston, MA
Mary F. Landrigan-Ossar, MD, PHD is an anesthesiology physician with a practice address in Boston, Massachusetts, and NPI 1487616850, issued on Apr 3, 2006. Check the license (Massachusetts 223170, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Mary F. Landrigan-Ossar
- Credential
- MD, PHD
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- 223170 MA
Self-reported in NPPES; status is on the state search - Practice location
- 300 Longwood Ave, Boston, MA 02115
- Phone
- (617) 355-7737
- Enumerated
- Apr 3, 2006
- Record last updated
- Aug 21, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20060106000513); accepts Medicare assignment
- Medical or professional school
- Icahn School Of Medicine At Mount Sinai, 2000
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 2,089 in Massachusetts → Look up another NPI →
Also registered at 300 Longwood Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mary F. Landrigan-Ossar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 223170Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Chmc Anesthesia Foundation IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary F. Landrigan-Ossar among 2,089 anesthesiology physician records in Massachusetts
Mary F. Landrigan-Ossar, MD, PHD is one of 2,089 anesthesiology physician records with a practice address in Massachusetts. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 18% of them.
- NPI issued2006 · 18% of these records are older, 59% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2000 · median 2008 among the 1,472 with a school on file
- Record last updated2007 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,082 anesthesiology physician records list a practice address in Boston
They are 1,082 of the 41,865 NPPES records with a practice address in Boston, and 2,089 anesthesiology physician records in Massachusetts.
All 2,089 in Massachusetts → Every provider in Boston → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Roland Brusseau, MDBoston, MA 021151063402535
- William Camann, MDBoston, MA 021151902887979
- Michael Dambra, MDBoston, MA 021151477534386
- James Dinardo, M.D.Boston, MA 021151962496281
- Sunil Eappen, MDBoston, MA 021151770564684
- Omid Farokhzad, MDBoston, MA 021151548241433
- Gyorgy Frendl, MD PHDBoston, MA 021151366423261
- Khadija Khan, MDBoston, MA 021151144202573
Common questions
What is Mary F. Landrigan-Ossar, MD, PHD's NPI number?
Mary F. Landrigan-Ossar, MD, PHD's National Provider Identifier (NPI) is 1487616850, issued on Apr 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mary F. Landrigan-Ossar, MD, PHD located?
The NPPES record lists a practice address at 300 Longwood Ave, Boston, MA, 02115. Phone: (617) 355-7737. Providers update this record themselves, so call before visiting.
How can I verify Mary F. Landrigan-Ossar, MD, PHD's license?
NPPES lists Massachusetts license number 223170, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.