Nicholas Mark Messamer, MD
Family Medicine Physician · Oskaloosa, IA
Nicholas Mark Messamer, MD is a family medicine physician with a practice address in Oskaloosa, Iowa, and NPI 1649264276, issued on Sep 9, 2005. Check the license (Iowa 27198, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Nicholas Mark Messamer
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 27198 IA
Self-reported in NPPES; status is on the state search - Practice location
- 410 N 12TH St, Oskaloosa, IA 52577
- Phone
- (641) 672-3360
- Enumerated
- Sep 9, 2005
- Record last updated
- Dec 5, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (641) 672-3366
- Medicaid ID
- 7050880 IA
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,336 in Iowa → Look up another NPI →
Also registered at 410 N 12TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Charles Argo, M.D.Family Medicine Physician1184616633
- Lori Bailey, ARNPFamily Nurse Practitioner1306819248
- Bronwyn Gunnink, PAPhysician Assistant1265127526
- Randall Hart, M.D.Family Medicine Physician1396733697
- Edward Hirl, M.D.Family Medicine Physician1427046804
- Tony Kunz, M.D.Family Medicine Physician1326036633
Verify Nicholas Mark Messamer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license 27198Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% fewer Medicare Part D claims than the average family medicine physician in 2024
13 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 0% of 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.
Nicholas Mark Messamer among 2,336 family medicine physician records in Iowa
Nicholas Mark Messamer, 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 84% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2012 · 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).
23 family medicine physician records list a practice address in Oskaloosa
They are 23 of the 253 NPPES records with a practice address in Oskaloosa, and 2,336 family medicine physician records in Iowa.
All 2,336 in Iowa → Every provider in Oskaloosa → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Charles Argo, M.D.Oskaloosa, IA 525771184616633
- Angela Godejohn, M.D.Oskaloosa, IA 525771699738880
- Randall Hart, M.D.Oskaloosa, IA 525771396733697
- Susan Harte, D.O.Oskaloosa, IA 525771508913146
- Edward Hirl, M.D.Oskaloosa, IA 525771427046804
- Tara Hoftiezer, DOOskaloosa, IA 525771689868069
- Tony Kunz, M.D.Oskaloosa, IA 525771326036633
- Stephen Mineart, M.D.Oskaloosa, IA 525771992793202
Common questions
What is Nicholas Mark Messamer, MD's NPI number?
Nicholas Mark Messamer, MD's National Provider Identifier (NPI) is 1649264276, issued on Sep 9, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Nicholas Mark Messamer, MD located?
The NPPES record lists a practice address at 410 N 12TH St, Oskaloosa, IA, 52577. Phone: (641) 672-3360. Providers update this record themselves, so call before visiting.
How can I verify Nicholas Mark Messamer, MD's license?
NPPES lists Iowa license number 27198, 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 Nicholas Mark Messamer, MD prescribe under Medicare Part D?
In 2024, Nicholas Mark Messamer, MD had 13 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.