Mary Landrigan-Ossar, MD, PHD
NPI 1487616850 · Anesthesiology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Landrigan-Ossar, MD, PHD is a Anesthesiology Physician provider in Boston, MA (NPI 1487616850).
Provider details
- NPI number
- 1487616850
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Female
- Sole proprietor
- No
- License
- 223170 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-03
- Last updated
- 2007-08-21
Frequently asked questions
- What is Mary Landrigan-Ossar's NPI number?
- Mary Landrigan-Ossar's National Provider Identifier (NPI) is 1487616850, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Landrigan-Ossar's specialty?
- Mary Landrigan-Ossar is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Landrigan-Ossar located?
- Mary Landrigan-Ossar's practice location on file with NPPES is 300 Longwood Ave, Boston, MA 02115-5724.
- What is Mary Landrigan-Ossar's phone number?
- The practice phone number listed in the NPPES registry for Mary Landrigan-Ossar is (617) 355-7737.
- Does Mary Landrigan-Ossar accept Medicare?
- Mary Landrigan-Ossar is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Landrigan-Ossar's NPI active?
- Yes — Mary Landrigan-Ossar's NPI (1487616850) is active in the NPPES registry as of the last update on 2007-08-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.