William Paltzer, MD
NPI 1578665873 · Family Medicine Physician · Mason City, IA
William Paltzer, MD is a Family Medicine Physician provider in Mason City, IA (NPI 1578665873).
Provider details
- NPI number
- 1578665873
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 23627 (IA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
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 · 6 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Mirtazapine | 27 |
| Duloxetine Hcl | 26 |
| Gabapentin | 26 |
| Lamotrigine | 26 |
| Levothyroxine Sodium | 26 |
| Quetiapine Fumarate | 26 |
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
- 2006-09-05
- Last updated
- 2022-09-07
- Certified
- 2022-09-07
Frequently asked questions
- What is William Paltzer's NPI number?
- William Paltzer's National Provider Identifier (NPI) is 1578665873, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Paltzer's specialty?
- William Paltzer is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Paltzer located?
- William Paltzer's practice location on file with NPPES is 1000 4th St Sw, Mason City, IA 50401-2800.
- What is William Paltzer's phone number?
- The practice phone number listed in the NPPES registry for William Paltzer is (641) 428-6999.
- Is William Paltzer's NPI active?
- Yes — William Paltzer's NPI (1578665873) is active in the NPPES registry as of the last update on 2022-09-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.