David Penfold, D.D.S.
NPI 1639308430 · Dentist · Mason City, IA
Enrolled with Medicare as Order and Referring Only - Oral Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Penfold, D.D.S. is a Dentist provider in Mason City, IA (NPI 1639308430).
Provider details
- NPI number
- 1639308430
- Entity type
- Individual
- Primary specialty
- DentistDental Providers
- Credential
- D.D.S.
- Sex
- Male
- Sole proprietor
- No
- License
- 08654 (IA)
Specialties & taxonomies
Dental Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
16 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 · 1 distinct drug on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Chlorhexidine Gluconate | 75 | 24 |
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
Registry dates
- Enumerated
- 2009-07-14
- Last updated
- 2009-07-14
Frequently asked questions
- What is David Penfold's NPI number?
- David Penfold's National Provider Identifier (NPI) is 1639308430, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Penfold's specialty?
- David Penfold is listed in the NPPES registry with a primary specialty of Dentist (Dental Providers).
- Where is David Penfold located?
- David Penfold's practice location on file with NPPES is 3223 4th St Sw, Mason City, IA 50401-1583.
- What is David Penfold's phone number?
- The practice phone number listed in the NPPES registry for David Penfold is (641) 424-6461.
- Does David Penfold accept Medicare?
- David Penfold is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Penfold's NPI active?
- Yes — David Penfold's NPI (1639308430) is active in the NPPES registry as of the last update on 2009-07-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.