Marissa Oconnor
NPI 1497271662 · Certified Registered Nurse Anesthetist · Cambridge, MA
Enrolled with Medicare as Practitioner - Certified Registered Nurse Anesthetist (crna) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marissa Oconnor is a Certified Registered Nurse Anesthetist provider in Cambridge, MA (NPI 1497271662).
Provider details
- NPI number
- 1497271662
- Entity type
- Individual
- Primary specialty
- Certified Registered Nurse AnesthetistPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- No
- License
- RN2294239 (MA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
8 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
26 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Anesthesia for Procedure on Nerves, Muscles, Tendons, and Tissue of Forearm, Wrist, and Hand01810 | 14 | $67 |
| Anesthesia for Other Procedure on Esophagus, Stomach, Or Upper Small Bowel Using an Endoscope00731 | 12 | $93 |
Typical Medicare-allowed amounts for these services range $67–$93 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (1)
- 690 Canton St Ste 240Westwood, MA 02090-2326Phone: (339) 204-9516
Registry dates
- Enumerated
- 2017-08-18
- Last updated
- 2025-11-07
- Certified
- 2025-11-07
Frequently asked questions
- What is Marissa Oconnor's NPI number?
- Marissa Oconnor's National Provider Identifier (NPI) is 1497271662, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marissa Oconnor's specialty?
- Marissa Oconnor is listed in the NPPES registry with a primary specialty of Certified Registered Nurse Anesthetist (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Marissa Oconnor located?
- Marissa Oconnor's practice location on file with NPPES is 330 Mount Auburn St, Cambridge, MA 02138-5597.
- What is Marissa Oconnor's phone number?
- The practice phone number listed in the NPPES registry for Marissa Oconnor is (774) 253-5361.
- Does Marissa Oconnor accept Medicare?
- Marissa Oconnor is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marissa Oconnor's NPI active?
- Yes — Marissa Oconnor's NPI (1497271662) is active in the NPPES registry as of the last update on 2025-11-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.