William Gascoyne, P.A.
NPI 1558396416 · Physician Assistant · Denver, CO
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Gascoyne, P.A. is a Physician Assistant provider in Denver, CO (NPI 1558396416).
Provider details
- NPI number
- 1558396416
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- P.A.
- Sex
- Male
- Sole proprietor
- No
- License
- 001194 (CT)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Oxycodone Hcl | 69 | 58 |
| Tramadol Hcl | 28 | 22 |
| Meloxicam | 21 | 21 |
| Pantoprazole Sodium | 16 | 16 |
| Hydromorphone Hcl | 14 | 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.
Practice location
Mailing address
Additional practice locations (1)
- 80 Health Park DrSuite 230Louisville, CO 80027-9584Phone: (303) 665-2603Fax: (303) 665-2605
Registry dates
- Enumerated
- 2006-07-11
- Last updated
- 2021-06-16
- Certified
- 2021-06-16
Frequently asked questions
- What is William Gascoyne's NPI number?
- William Gascoyne's National Provider Identifier (NPI) is 1558396416, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Gascoyne's specialty?
- William Gascoyne is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is William Gascoyne located?
- William Gascoyne's practice location on file with NPPES is 2045 N Franklin St, Denver, CO 80205-5437.
- What is William Gascoyne's phone number?
- The practice phone number listed in the NPPES registry for William Gascoyne is (303) 338-4545.
- Does William Gascoyne accept Medicare?
- William Gascoyne is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Gascoyne's NPI active?
- Yes — William Gascoyne's NPI (1558396416) is active in the NPPES registry as of the last update on 2021-06-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.