Quick answers
- Does Nathaniel J. Jellinek accept Medicare assignment?
- Yes. Medicare's clinician data says Nathaniel J. Jellinek 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 Nathaniel J. Jellinek see?
- In 2024, CMS data shows 406 Original Medicare patients and 1,352 services for Nathaniel J. Jellinek. This counts Original Medicare only and measures volume, not quality.
- What is Nathaniel J. Jellinek's NPI number?
- 1245256528. 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 Nathaniel J. Jellinek, 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 | 406 |
|---|---|
| Services billed to Medicare | 1,352 |
| Different services or procedures | 87 |
| Participating Medicare provider | Yes |
| Average age of these patients | 78 |
Most frequent services
- Removal and microscopic exam of growth of head, neck, hands, feet, or genitals, 1-5 tissue blocks (17311)257 services
- Removal and microscopic exam of growth of head, neck, hands, feet, or genitals, each additional stage, 1-5 tissue blocks (17312)143 services
- Strapping, unna boot (29580)112 services
- Complicated repair of wound of forehead, cheeks, chin, mouth, neck, underarms, genitals, hands, or feet, 2.6-7.5 cm (13132)105 services
- Removal and microscopic exam of growth of trunk, arms, or legs, 1-5 tissue blocks (17313)89 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%
- Arthritis47%
- Ischemic heart disease30%
- Anxiety23%
- Atrial fibrillation22%
Practice locations
Addresses where Nathaniel J. Jellinek is enrolled with Medicare (CMS data updated October 2, 2026).
- 1672 S County Trl, Suite 101East Greenwich, RI 02818 (401) 885‑7546
- 29 B Cottage StAmherst, MA 01002 (978) 371‑7010
Group practices
Medicare enrollment lists Nathaniel J. Jellinek as a member of these groups (CMS data updated October 2, 2026).
- Dermatology Professionals Inc20 clinicians in the group
- Pioneer Valley Dermatology PC6 clinicians in the group
Specialties
- Dermatologyprimary
Other dermatologists in Rhode Island
Clinicians with the same Medicare primary specialty in Rhode Island — not a recommendation.
Other clinicians in Dermatology Professionals Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Massachusetts Medical School |
| Graduation year | 2000 (26 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1245256528 |
| 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
- 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