Mark William Niemer, M.D.
Rheumatology Physician · Dubuque, IA
Mark William Niemer, M.D. is a rheumatology physician with a practice address in Dubuque, Iowa, and NPI 1275585259, issued on May 17, 2006. Check the license (Iowa 28785, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Mark William Niemer
- Credential
- M.D.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License numbers
- 28785 IA
37106 WI
Self-reported in NPPES; status is on the state search - Practice location
- 1500 Associates Dr, Dubuque, IA 52002
- Phone
- (563) 584-4460
- Enumerated
- May 17, 2006
- Record last updated
- Sep 8, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (563) 584-4395
- Medicaid ID
- 0083279 IA
- Medicare enrollment
- Enrolled (PECOS I20040505001369); accepts Medicare assignment
- Medical or professional school
- Ohio State University College Of Medicine, 1985
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 57 in Iowa → Look up another NPI →
Also registered at 1500 Associates Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Edward Alt, MDObstetrics & Gynecology Physician1548432727
- Matthew Arensdorff, O.D.Optometrist1255644621
- Daniel Armstrong, PHYSICIAN ASSISTANTMedical Physician Assistant1699909028
- Jeffrey Artioli, CRNACertified Registered Nurse Anesthetist1558006411
- William Auer, ODOptometrist1598334971
- Kent Baumann, M.D.Ophthalmology Physician1316999725
Verify Mark William Niemer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license 28785Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
79% fewer Medicare Part D claims than the average rheumatology physician in 2024
410 Medicare Part D claims for 100 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims. 16 claims were for opioids.
Most prescribed
- Methotrexate85 claims
- Prednisone71 claims
- Alendronate Sodium41 claims
- Allopurinol28 claims
- Hydroxychloroquine Sulfate25 claims
- Meloxicam22 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.
Bills Medicare through one group practice
- Medical Associates Clinic P CDubuque, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark William Niemer among 57 rheumatology physician records in Iowa
Mark William Niemer, M.D. is one of 57 rheumatology physician records with a practice address in Iowa. 86% 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 21% of them.
- NPI issued2006 · 21% of these records are older, 51% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1985 · median 2004 among the 39 with a school on file
- Record last updated2010 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in Iowa
There are 57 rheumatology physician records in Iowa.
All 57 in Iowa → Every provider in Dubuque → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Matthew Samec, MDDecorah, IA 521011447782735
- Brittany Bettendorf, M.D.Iowa City, IA 522421487943908
- John Cowdery, MDIowa City, IA 522421881682797
- Elizabeth Field, MDIowa City, IA 522421790773638
- Bharat Kumar, M.D.Iowa City, IA 522421952694309
- Petar Lenert, MDIowa City, IA 522421790772846
- Aleksander Lenert, M.D.Iowa City, IA 522421770716193
- Craig Morita, MD PHDIowa City, IA 522421770571630
Common questions
What is Mark William Niemer, M.D.'s NPI number?
Mark William Niemer, M.D.'s National Provider Identifier (NPI) is 1275585259, issued on May 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark William Niemer, M.D. located?
The NPPES record lists a practice address at 1500 Associates Dr, Dubuque, IA, 52002. Phone: (563) 584-4460. Providers update this record themselves, so call before visiting.
How can I verify Mark William Niemer, M.D.'s license?
NPPES lists Iowa license number 28785, 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 Mark William Niemer, M.D. prescribe under Medicare Part D?
In 2024, Mark William Niemer, M.D. had 410 Medicare Part D claims for 100 beneficiaries; the average among rheumatology physician prescribers was 1,978. 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.