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MARISSA DILORETO
NPI 1851967285
Nurse Anesthetist, Certified Registered in Portsmouth, NH

Active since May 27, 2021PECOS EnrolledAccepts Medicare Assignment
333 BORTHWICK AVE STE 100, PORTSMOUTH, NH 03801(603) 436-5110 Get Directions Write a Review

NPPES record last updated: September 18, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Marissa Diloreto NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARISSA DILORETO (NPI 1851967285) is an individual nurse anesthetist, certified registered in Portsmouth, New Hampshire, licensed in New Hampshire (977058-23) and active in the NPI registry since May 2021. She is enrolled in Medicare PECOS, is affiliated with Frisbie Memorial Hospital, and is a graduate of Other (2023).

NPPES Registry Identity

NPI1851967285
Entity TypeIndividualFemale
Primary Taxonomy367500000X
Provider Legal NameMARISSA DILORETO
Location Address333 BORTHWICK AVE STE 100Portsmouth, NH 03801-4198
Mailing Address35 Park St Unit BPortsmouth, NH 03801-5029 · (781) 929-5208
Phone(603) 436-5110
Sole ProprietorNo
Medical School CMSOtherGraduated 2023
Enumeration DateMay 27, 2021
Last NPPES UpdateSeptember 18, 2023
NPPES CertifiedSeptember 18, 2023
✔ NPI 1851967285 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Anesthetist, Certified RegisteredPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code367500000X
License✔ Licensed in NH · 977058-23
Definition
(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.
333 BORTHWICK AVE STE 100, Portsmouth, NH 03801
Open in Google Maps ↗

Other Names 1

Former Name (1)Marissa Kelly

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include WellSense Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Marissa Diloreto is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3375991169
PECOS Enrollment IDI20231205001929
Eligible to Order & Refer✔ Part B Labs & Imaging– Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Marissa Diloreto reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Portsmouth Anesthesia Associates PA
0.5 mi
Anesthesiology
333 BORTHWICK AVENUE, PORTSMOUTH ANESTHESIA ASSOCIATES
Portsmouth, NH 03801
  • Reassigned Medicare billing, New Hampshire enrollment
  • 58 clinicians in this Medicare group
NPI 1568584290 (603) 749-0043
Stratham Anesthesia Associates PLLC
8.5 mi
Anesthesiology
4 WEST RD
Stratham, NH 03885
  • Reassigned Medicare billing, New Hampshire enrollment
  • 45 clinicians in this Medicare group
NPI 1346480639 (603) 498-2330

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 6

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope 00731
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.
42 services42 patients
Anesthesia for procedure for total knee joint replacement 01402
Anesthesia for a total knee joint replacement numbs your body to eliminate pain during surgery. This could be general anesthesia where you're unconscious, or regional anesthesia where only the leg is numb. It's administered by a specialist, ensuring safety and comfort.
26 services26 patients
Anesthesia for exam of colon using an endoscope 00812
Anesthesia for a colon examination with an endoscope is a method used to ensure comfort during the procedure. It involves administering medication to help you relax or sleep, thus reducing discomfort as the endoscope, a thin, flexible tube, is navigated through your colon.
21 services21 patients
Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) 64447
This procedure involves injecting a numbing agent and/or steroid into a nerve in your thigh. It's done to alleviate pain or inflammation. A needle will be carefully positioned near the nerve, and the medicine will be administered.
21 services21 patients
Anesthesia for other procedure on large bowel using an endoscope 00811
Anesthesia for an endoscopic procedure on the large bowel ensures comfort and relaxation during the procedure. You'll be given medication to make you drowsy or asleep, eliminating any discomfort. The medication can be administered through a vein or inhaled.
15 services15 patients
Anesthesia for x-ray or radiation therapy 01922
Anesthesia for x-ray or radiation therapy involves administering medication to help you relax or sleep during the procedure. It's used to ensure comfort, minimize movement, and reduce anxiety. The type of anesthesia used depends on the procedure and patient's health.
15 services15 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Frisbie Memorial Hospital

Acute Care Hospitals · Rochester, NH
2/5 CMS rating
OwnershipProprietary
CMS Certification Number300014
Location11 Whitehall RoadRochester, NH 03867 · Strafford County
Emergency services

Portsmouth Regional Hospital

Acute Care Hospitals · Portsmouth, NH
3/5 CMS rating
OwnershipProprietary
CMS Certification Number300029
Location333 Borthwick AvePortsmouth, NH 03801 · Rockingham County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 03801 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$132.09 typical visit price
range $57.75 – $174.26
Typical copayment $33.02 (range $14.43 – $43.56)
Most-billed visit code 99204
Established Patient
$71.85 typical visit price
range $18.70 – $142.15
Typical copayment $17.96 (range $4.67 – $35.53)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ALEXANDRA LOOMIS DO
Emergency Medicine
333 BORTHWICK AVE STE 100
PORTSMOUTH, NH 03801
Rockingham County (617) 763-1295
EMILY KERI RIEMER MD
Student in an Organized Health Care Education/Training Program
333 BORTHWICK AVE STE 100, GRADUATE MEDICAL EDUCATION
PORTSMOUTH, NH 03801
Rockingham County (603) 436-5110
JORGE EDUARDO SAONA CENTENO M.D.
Hospitalist
333 BORTHWICK AVE STE 100
PORTSMOUTH, NH 03801
Rockingham County (561) 965-7300
DR. LAUREN DEMARIS DO
Internal Medicine
333 BORTHWICK AVE STE 100
PORTSMOUTH, NH 03801
Rockingham County (603) 436-5110
DOMINIC FOOA
Registered Nurse (Critical Care Medicine)
333 BORTHWICK AVE STE 100
PORTSMOUTH, NH 03801
Rockingham County (603) 436-5110
NIKITA ROSEWELL MD
Student in an Organized Health Care Education/Training Program
333 BORTHWICK AVE STE 100
PORTSMOUTH, NH 03801
Rockingham County (603) 559-4129
LIZBETH ANNE LIAKOS
Occupational Therapist
333 BORTHWICK AVE STE 100
PORTSMOUTH, NH 03801
Rockingham County (603) 433-5110
DR. ORI OFFENBACH OFEK MD
Internal Medicine
333 BORTHWICK AVE STE 100
PORTSMOUTH, NH 03801
Rockingham County (603) 436-5110

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Marissa Diloreto's NPI number?

The NPI number for Marissa Diloreto is 1851967285. It was assigned to this individual provider in the NPPES registry on May 27, 2021. The provider is also known as Marissa Kelly.

Where is Marissa Diloreto located?

Marissa Diloreto practices at 333 Borthwick Ave Ste 100, Portsmouth, NH 03801. The listed phone number is (603) 436-5110.

What is Marissa Diloreto's specialty?

The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.

Is Marissa Diloreto enrolled in Medicare?

Yes. Marissa Diloreto is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Marissa Diloreto's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marissa Diloreto reassigns Medicare benefits to 2 organizations: Portsmouth Anesthesia Associates PA (Portsmouth, NH) and Stratham Anesthesia Associates PLLC (Stratham, NH). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Marissa Diloreto's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Marissa Diloreto accept?

Health plans from WellSense Health Plan list Marissa Diloreto as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Marissa Diloreto affiliated with any hospitals?

According to CMS data, Marissa Diloreto is affiliated with Frisbie Memorial Hospital and Portsmouth Regional Hospital.

When was this NPI record last updated?

The NPPES record for Marissa Diloreto was last updated on September 18, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.