William B. Paltzer, MD
Family Medicine Physician · Mason City, IA
William B. Paltzer, MD is a family medicine physician with a practice address in Mason City, Iowa, and NPI 1578665873, issued on Sep 5, 2006. Check the license (Iowa 23627, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- William B. Paltzer
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 23627 IA
Self-reported in NPPES; status is on the state search - Practice location
- 1000 4TH St SW, Mason City, IA 50401
- Phone
- (641) 428-6999
- Enumerated
- Sep 5, 2006
- Record last updated
- Sep 7, 2022
- Fax
- (641) 428-6678
- Medicaid ID
- 9029637 IA
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,336 in Iowa → Look up another NPI →
Also registered at 1000 4TH St SW
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William B. Paltzer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license 23627Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average family medicine physician in 2024
163 Medicare Part D claims, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Mirtazapine27 claims
- Duloxetine Hcl26 claims
- Gabapentin26 claims
- Lamotrigine26 claims
- Levothyroxine Sodium26 claims
- Quetiapine Fumarate26 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
William B. Paltzer among 2,336 family medicine physician records in Iowa
William B. Paltzer, MD is one of 2,336 family medicine physician records with a practice address in Iowa. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 16% of them.
- NPI issued2006 · 16% of these records are older, 48% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2022 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
56 family medicine physician records list a practice address in Mason City
They are 56 of the 866 NPPES records with a practice address in Mason City, and 2,336 family medicine physician records in Iowa.
All 2,336 in Iowa → Every provider in Mason City → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Joseph Behr, MDMason City, IA 504011770699423
- Robert Borgman, MDMason City, IA 504011750304028
- Mark Dankle, DOMason City, IA 504011891725834
- Robert Fagerholm, M.D.Mason City, IA 504011477584092
- Rebecca Jenkins, D.O.Mason City, IA 504011285613893
- Hameed Khan, MDMason City, IA 504011700813342
- Kimberly Larson, ARNPMason City, IA 504011689680183
- Mark Mahoney, M.D.Mason City, IA 504011427028554
Common questions
What is William B. Paltzer, MD's NPI number?
William B. Paltzer, MD's National Provider Identifier (NPI) is 1578665873, issued on Sep 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William B. Paltzer, MD located?
The NPPES record lists a practice address at 1000 4TH St SW, Mason City, IA, 50401. Phone: (641) 428-6999. Providers update this record themselves, so call before visiting.
How can I verify William B. Paltzer, MD's license?
NPPES lists Iowa license number 23627, as entered by the provider. Search the Iowa Board of Medicine at https://dial.iowa.gov/about-dial/boards-and-commissions/medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William B. Paltzer, MD prescribe under Medicare Part D?
In 2024, William B. Paltzer, MD had 163 Medicare Part D claims; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.