Quick answers
- Does Marissa S. Frongillo accept Medicare assignment?
- Yes. Medicare's clinician data says Marissa S. Frongillo accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Marissa S. Frongillo see?
- In 2024, CMS data shows 264 Original Medicare patients and 958 services for Marissa S. Frongillo. This counts Original Medicare only and measures volume, not quality.
- What is Marissa S. Frongillo's NPI number?
- 1588017263. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Marissa S. Frongillo, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 264 |
|---|---|
| Services billed to Medicare | 958 |
| Different services or procedures | 45 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)208 services
- Insertion of needle into vein for collection of blood sample (36415)86 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)71 services
- Blood test, basic group of blood chemicals (calcium, total) (80048)62 services
- Liver enzyme (sgot), level (84450)46 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure72%
- Arthritis43%
- Chronic kidney disease34%
- Anxiety33%
- Ischemic heart disease25%
Hospitals where Marissa S. Frongillo works
Medicare's Facility Affiliation Data lists Marissa S. Frongillo at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Cape Cod HospitalHyannis, MA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 220012
- Falmouth HospitalFalmouth, MA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 220135
Practice locations
Addresses where Marissa S. Frongillo is enrolled with Medicare (CMS data updated October 2, 2026).
- 495 Station AveS Yarmouth, MA 02664 (774) 552‑3208
Group practices
Medicare enrollment lists Marissa S. Frongillo as a member of this group (CMS data updated October 2, 2026).
- Medical Affiliates of Cape Cod Inc229 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in S Yarmouth
Clinicians with the same Medicare primary specialty in S Yarmouth, MA — not a recommendation.
Other clinicians in Medical Affiliates of Cape Cod Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2016 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1588017263 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians