Ian M. Koontz, M.D.
Internal Medicine Physician · Dubuque, IA
Ian M. Koontz, M.D. is an internal medicine physician with a practice address in Dubuque, Iowa, and NPI 1205805199, issued on Mar 14, 2006. Check the license (Iowa 27816, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Ian M. Koontz
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 27816 IA
Self-reported in NPPES; status is on the state search - Practice location
- 1515 Delhi St, Dubuque, IA 52001
- Phone
- (563) 557-9111
- Enumerated
- Mar 14, 2006
- Record last updated
- Apr 6, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (563) 589-4046
- Medicaid IDs
- 32110500 WI
1101634 IA - Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 871 in Iowa → Look up another NPI →
Also registered at 1515 Delhi St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Zhengjin Cao, M.D.Internal Medicine Physician1861616039
- Richard Fairley, M.D.Internal Medicine Physician1801862552
- Krishnarao Gorrepati, MDGastroenterology Physician1588624811
- Angela Hubanks, PA-CMedical Physician Assistant1356538300
- Ronald Iverson, M.D.Endocrinology, Diabetes & Metabolism Physician1265407589
Verify Ian M. Koontz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license 27816Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average internal medicine physician in 2024
84 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium14 claims
- Famotidine14 claims
- Lisinopril13 claims
- Metoprolol Succinate12 claims
- Pravastatin Sodium12 claims
- Prednisone12 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.
Ian M. Koontz among 871 internal medicine physician records in Iowa
Ian M. Koontz, M.D. is one of 871 internal medicine physician records with a practice address in Iowa. 70% 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 11% of them.
- NPI issued2006 · 11% of these records are older, 62% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileNo · 44% of these records are
- Record last updated2021 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
30 internal medicine physician records list a practice address in Dubuque
They are 30 of the 1,468 NPPES records with a practice address in Dubuque, and 871 internal medicine physician records in Iowa.
All 871 in Iowa → Every provider in Dubuque → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Catherine Crall, M.D.Dubuque, IA 520011104896273
- Richard Fairley, M.D.Dubuque, IA 520011801862552
- Angela Kelley, D.O.Dubuque, IA 520011881654473
- Matthew Kirkendall, M.D.Dubuque, IA 520011821067794
- Cynthia Konz, M.D.Dubuque, IA 520011013986918
- Philip Leeson, M.D.Dubuque, IA 520011932175676
- Mark Liaboe, M.D.Dubuque, IA 520011194794321
- Allen Meurer, M.D.Dubuque, IA 520011114986353
Common questions
What is Ian M. Koontz, M.D.'s NPI number?
Ian M. Koontz, M.D.'s National Provider Identifier (NPI) is 1205805199, issued on Mar 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ian M. Koontz, M.D. located?
The NPPES record lists a practice address at 1515 Delhi St, Dubuque, IA, 52001. Phone: (563) 557-9111. Providers update this record themselves, so call before visiting.
How can I verify Ian M. Koontz, M.D.'s license?
NPPES lists Iowa license number 27816, 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 Ian M. Koontz, M.D. prescribe under Medicare Part D?
In 2024, Ian M. Koontz, M.D. had 84 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. 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.