Quick answers
- Does Jessica A. Macwilliams accept Medicare assignment?
- Medicare's clinician data says Jessica A. Macwilliams may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- How many Medicare patients does Jessica A. Macwilliams see?
- In 2024, CMS data shows 232 Original Medicare patients and 531 services for Jessica A. Macwilliams. This counts Original Medicare only and measures volume, not quality.
- What is Jessica A. Macwilliams's NPI number?
- 1578663001. 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 Jessica A. Macwilliams, 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 | 232 |
|---|---|
| Services billed to Medicare | 531 |
| Different services or procedures | 27 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)115 services
- Destruction of precancer skin growth, 2-14 growths (17003)91 services
- Biopsy of related skin growth, first growth (11102)56 services
- Destruction of precancer skin growth, 1 growth (17000)54 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)36 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 cholesterol72%
- High blood pressure70%
- Arthritis46%
- Anxiety25%
- Depression23%
- Diabetes22%
Practice locations
Addresses where Jessica A. Macwilliams is enrolled with Medicare (CMS data updated October 2, 2026).
- 200 Silver St, Unit 106Agawam, MA 01001
Group practices
Medicare enrollment lists Jessica A. Macwilliams as a member of this group (CMS data updated October 2, 2026).
- Hillside Dermatology PC7 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Agawam
Clinicians with the same Medicare primary specialty in Agawam, MA — not a recommendation.
Other clinicians in Hillside Dermatology PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2005 |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1578663001 |
| 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