MARISSA OCONNOR
NPI 1497271662
Nurse Anesthetist, Certified Registered in Cambridge, MA
NPI Status: Active since August 18, 2017
Contact Information
330 MOUNT AUBURN ST
CAMBRIDGE, MA
ZIP 02138
Phone: (774) 253-5361
NPPES record last updated: November 7, 2025. Verified against the NPPES registry weekly; last sync: July 19, 2026.
Record update history: Nov 7, 2025, Aug 1, 2019, Aug 18, 2017 (3 updates tracked since 2017).
- Individual
- Female
- Nurse Anesthetist, Certified Registered
About MARISSA OCONNOR
This page provides the complete NPI Profile along with additional information for Marissa Oconnor, a provider established in Cambridge, Massachusetts with a medical specialization in Nurse Anesthetist, Certified Registered. The healthcare provider is registered in the NPI registry with number 1497271662 assigned on August 2017. The practitioner's primary taxonomy code is 367500000X with license number RN2294239 (MA). The provider is registered as an individual and her NPI record was last updated one year ago.
- NPI
- 1497271662
- Provider Name
- MARISSA OCONNOR
- Gender
- Female
- Entity Type
- Individual
- Location Address
- 330 MOUNT AUBURN ST CAMBRIDGE, MA 02138
- Location Phone
- (774) 253-5361
- Mailing Address
- 330 MOUNT AUBURN ST CAMBRIDGE, MA 02138
- Mailing Phone
- (774) 253-5361
- Is Sole Proprietor?
- No
- Enumeration Date
- 08-18-2017
- Last Update Date
- 11-07-2025
- Code Navigator
Location Map
Secondary Locations
- 690 Canton St Ste 240
Westwood, MA 02090
(339) 204-9516
Specialty - Primary Taxonomy
The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.
- Classification
Nurse Anesthetist, Certified Registered
- Taxonomy Code
- 367500000X
- Type
- Physician Assistants & Advanced Practice Nursing Providers
- License No.
- RN2294239
- License State
- MA
- Taxonomy Description
- (1) A licensed registered nurse with advanced specialty education in anesthesia who, in collaboration with appropriate health care professionals, provides preoperative, intraoperative, and postoperative care to patients and assists in management and resuscitation of critical patients in intensive care, coronary care, and emergency situations. Nurse anesthetists are certified following successful completion of credentials and state licensure review and a national examination directed by the Council on Certification of Nurse Anesthetists. (2) A registered nurse who is qualified by special training to administer anesthesia in collaboration with a physician or dentist and who can assist in the care of patients who are in critical condition.
Secondary Taxonomies
The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.
| No. | Taxonomy Code | Type | Classification / Specialization |
License No. (State) |
|---|---|---|---|---|
| 1 | 390200000X | Student, Health Care | Student in an Organized Health Care Education/Training Program |
Areas of Expertise
The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.
Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope
Anesthesia for procedure on nerves, muscles, tendons, and tissue of forearm, wrist, and hand
This procedure involves the use of an endoscope, a flexible tube with a light and camera, to examine your esophagus, stomach, or upper small bowel. Anesthesia ensures you are comfortable and pain-free during the procedure.
This service was performed 12 times for 12 patientsAnesthesia for procedures on the forearm, wrist, and hand involves administering medication to block sensation in these areas. This helps ensure comfort and painlessness during surgeries or treatments involving nerves, muscles, tendons, and tissue in these regions.
This service was performed 14 times for 14 patientsReviews for MARISSA OCONNOR
There are currently no reviews for this provider. Be the first person to share your experience with this provider by filling out our review form. Your insights are appreciated and will help others make informed decisions.
NPI Number Validation
How NPI Validation Works
The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.
To verify the NPI 1497271662, we treat the final digit (2) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 68. The final step is to find the difference between that total and the next multiple of ten (70 - 68 = 2).
Digit-by-digit view
Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.
Step 1: Double every other digit from the right
Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 68 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 20 providers are registered at the same or a nearby location.
CAMBRIDGE, MA 02138
CAMBRIDGE, MA 02138
CAMBRIDGE, MA 02138
CAMBRIDGE, MA 02138
CAMBRIDGE, MA 02138
CAMBRIDGE, MA 02138
CAMBRIDGE, MA 02138
CAMBRIDGE, MA 02138
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1497271662, enumerated as an "individual" on August 18, 2017.
The provider is located at 330 MOUNT AUBURN ST CAMBRIDGE, MA 02138 and the phone number is (774) 253-5361.
Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
