William Mason, FNP
NPI 1801553250 · Family Nurse Practitioner · Alpine, TX
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Mason, FNP is a Family Nurse Practitioner provider in Alpine, TX (NPI 1801553250).
Provider details
- NPI number
- 1801553250
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Male
- Sole proprietor
- No
- License
- 1056981 (TX)
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 tenure33% of score
4 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- 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 · 35 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 148 | 49 |
| Amlodipine Besylate | 99 | 42 |
| Lisinopril | 98 | 33 |
| Levothyroxine Sodium | 94 | 30 |
| Metformin Hcl | 68 | 25 |
| Losartan Potassium | 49 | 17 |
| Metoprolol Succinate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$22 across 1 record (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
- 2021-11-19
- Last updated
- 2021-11-19
- Certified
- 2021-10-15
Frequently asked questions
- What is William Mason's NPI number?
- William Mason's National Provider Identifier (NPI) is 1801553250, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Mason's specialty?
- William Mason is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is William Mason located?
- William Mason's practice location on file with NPPES is 1605 Fort Davis Highway, Alpine, TX 79830.
- What is William Mason's phone number?
- The practice phone number listed in the NPPES registry for William Mason is (432) 837-4555.
- Does William Mason accept Medicare?
- William Mason is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Mason's NPI active?
- Yes — William Mason's NPI (1801553250) is active in the NPPES registry as of the last update on 2021-11-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.