Quick answers
- Does Marianne Demarco accept Medicare assignment?
- Yes. Medicare's clinician data says Marianne Demarco 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 Marianne Demarco see?
- In 2024, CMS data shows 1,312 Original Medicare patients and 3,471 services for Marianne Demarco. This counts Original Medicare only and measures volume, not quality.
- What is Marianne Demarco's NPI number?
- 1619981727. 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 Marianne Demarco, 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 | 1,312 |
|---|---|
| Services billed to Medicare | 3,471 |
| Different services or procedures | 23 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Pathology examination of tissue using a microscope, intermediate complexity (88305)1,976 services
- Special stained specimen slides to examine tissue, initial procedure (88342)411 services
- Protein measurement, serum (84165)177 services
- Preparation of tissue for examination by removing any calcium present (88311)175 services
- Immunologic analysis technique on serum (immunofixation) (86334)168 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%
- Arthritis53%
- Ischemic heart disease30%
- Anxiety30%
- Chronic kidney disease27%
Hospitals where Marianne Demarco works
Medicare's Facility Affiliation Data lists Marianne Demarco 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.
- Beth Israel Deaconess Hospital - NeedhamNeedham, MA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 220083
- Beth Israel Deaconess Hospital PlymouthPlymouth, MA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 220060
Practice locations
Addresses where Marianne Demarco is enrolled with Medicare (CMS data updated October 2, 2026).
- 275 Sandwich StPlymouth, MA 02360 (508) 746‑2000
Group practices
Medicare enrollment lists Marianne Demarco as a member of this group (CMS data updated October 2, 2026).
- Jordan Physician Associates Inc167 clinicians in the group
Specialties
- Pathologyprimary
Other pathologists in Plymouth
Clinicians with the same Medicare primary specialty in Plymouth, MA — not a recommendation.
Other clinicians in Jordan Physician Associates Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1992 (34 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1619981727 |
| 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