Clarence Mast, MD
NPI 1902898638 · Family Medicine Physician · Meshoppen, PA
Clarence Mast, MD is a Family Medicine Physician provider in Meshoppen, PA (NPI 1902898638).
Provider details
- NPI number
- 1902898638
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD 0126030E (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
20 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 · 46 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydroxychloroquine Sulfate | 218 | 66 |
| Doxycycline Hyclate | 182 | 62 |
| Azithromycin | 181 | 74 |
| Tinidazole | 179 | 68 |
| Valacyclovir Hclbrand: Valacyclovir | 167 | 56 |
| Nystatin | 129 | 46 |
| Prednisone | 101 | 26 |
| Atovaquone |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$96 across 6 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
- 2005-08-18
- Last updated
- 2010-03-08
Frequently asked questions
- What is Clarence Mast's NPI number?
- Clarence Mast's National Provider Identifier (NPI) is 1902898638, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Clarence Mast's specialty?
- Clarence Mast is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Clarence Mast located?
- Clarence Mast's practice location on file with NPPES is Route 6, Meshoppen, PA 18630.
- What is Clarence Mast's phone number?
- The practice phone number listed in the NPPES registry for Clarence Mast is (570) 833-8300.
- Is Clarence Mast's NPI active?
- Yes — Clarence Mast's NPI (1902898638) is active in the NPPES registry as of the last update on 2010-03-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.