Quick answers
- Does Mary Lee Mattei accept Medicare assignment?
- Yes. Medicare's clinician data says Mary Lee Mattei 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 Mary Lee Mattei see?
- In 2024, CMS data shows 992 Original Medicare patients and 1,703 services for Mary Lee Mattei. This counts Original Medicare only and measures volume, not quality.
- What is Mary Lee Mattei's NPI number?
- 1235105792. 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 Mary Lee Mattei, 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 | 992 |
|---|---|
| Services billed to Medicare | 1,703 |
| Different services or procedures | 23 |
| Participating Medicare provider | Yes |
| Average age of these patients | 80 |
Most frequent services
- Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days (93294)580 services
- Evaluation of cardiac rhythm monitor system, remote up to 30 days (93298)548 services
- Evaluation of single, dual, or multiple lead implantable defibrillator system, remote up to 90 days (93295)250 services
- Evaluation of single, dual, multiple lead or leadless pacemaker system (93288)59 services
- Insertion of heart rhythm monitor under skin (33285)49 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 blood pressure75%
- High cholesterol75%
- Atrial fibrillation59%
- Ischemic heart disease49%
- Heart failure49%
- Chronic kidney disease45%
Hospitals where Mary Lee Mattei works
Medicare's Facility Affiliation Data lists Mary Lee Mattei 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.
- Lahey Hospital & Medical Center, BurlingtonBurlington, MA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 220171
- Northeast Hospital CorporationBeverly, MA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 220033
Practice locations
Addresses where Mary Lee Mattei is enrolled with Medicare (CMS data updated October 2, 2026).
- 1 Essex Ctr DrPeabody, MA 01960 (978) 538‑4000
Group practices
Medicare enrollment lists Mary Lee Mattei as a member of this group (CMS data updated October 2, 2026).
- Lahey Clinic Inc1,381 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Peabody
Clinicians with the same Medicare primary specialty in Peabody, MA — not a recommendation.
Other clinicians in Lahey Clinic Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 1996 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1235105792 |
| 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