Jessica Macwilliams, PAC
NPI 1578663001 · Physician Assistant · Agawam, MA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jessica Macwilliams, PAC is a Physician Assistant provider in Agawam, MA (NPI 1578663001).
Provider details
- NPI number
- 1578663001
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PAC
- Sex
- Female
- Sole proprietor
- No
- License
- 002204 (CT)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
406 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 115 | $95 |
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 91 | $6 |
| Biopsy of Related Skin Growth, First Growth11102 | 56 | $84 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 54 | $48 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 36 | $78 |
| New Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 15 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Triamcinolone Acetonide | 97 | 75 |
| Betamethasone Dipropionate | 67 | 47 |
| Tacrolimus | 54 | 24 |
| Minoxidil | 44 | 18 |
| Ketoconazole | 42 | 28 |
| Metronidazole | 39 | 23 |
| Prednisone | 36 | 20 |
| Dupilumabbrand: Dupixent Pen |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$4,084 across 177 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-24
- Last updated
- 2026-04-13
- Certified
- 2026-04-13
Frequently asked questions
- What is Jessica Macwilliams's NPI number?
- Jessica Macwilliams's National Provider Identifier (NPI) is 1578663001, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jessica Macwilliams's specialty?
- Jessica Macwilliams is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Jessica Macwilliams located?
- Jessica Macwilliams's practice location on file with NPPES is 200 Silver St Unit 106, Agawam, MA 01001-3067.
- What is Jessica Macwilliams's phone number?
- The practice phone number listed in the NPPES registry for Jessica Macwilliams is (413) 341-5350.
- Does Jessica Macwilliams accept Medicare?
- Jessica Macwilliams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jessica Macwilliams's NPI active?
- Yes — Jessica Macwilliams's NPI (1578663001) is active in the NPPES registry as of the last update on 2026-04-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.