Guinevere Arthur Vanhorne, PA-C
NPI 1447829585 · Physician Assistant · South Hadley, MA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Guinevere Arthur Vanhorne, PA-C is a Physician Assistant provider in South Hadley, MA (NPI 1447829585).
Provider details
- NPI number
- 1447829585
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Female
- Sole proprietor
- No
- License
- PA8192 (MA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
5 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 22 | 11 |
| Amlodipine Besylate | 12 | — |
| Levothyroxine Sodium | 12 | — |
| Pantoprazole Sodium | 12 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$102 across 2 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
Additional practice locations (1)
- 22 Atwood DrNorthampton, MA 01060-4267Phone: (413) 570-4900
Registry dates
- Enumerated
- 2021-06-23
- Last updated
- 2024-04-23
- Certified
- 2024-04-23
Frequently asked questions
- What is Guinevere Arthur Vanhorne's NPI number?
- Guinevere Arthur Vanhorne's National Provider Identifier (NPI) is 1447829585, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Guinevere Arthur Vanhorne's specialty?
- Guinevere Arthur Vanhorne is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Guinevere Arthur Vanhorne located?
- Guinevere Arthur Vanhorne's practice location on file with NPPES is 470 Granby Rd, South Hadley, MA 01075-3218.
- What is Guinevere Arthur Vanhorne's phone number?
- The practice phone number listed in the NPPES registry for Guinevere Arthur Vanhorne is (413) 533-3926.
- Does Guinevere Arthur Vanhorne accept Medicare?
- Guinevere Arthur Vanhorne is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Guinevere Arthur Vanhorne's NPI active?
- Yes — Guinevere Arthur Vanhorne's NPI (1447829585) is active in the NPPES registry as of the last update on 2024-04-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.