Ian J. Stock, DO
Family Medicine Physician · Decorah, IA
Ian J. Stock, DO is a family medicine physician with a practice address in Decorah, Iowa, and NPI 1326544537, issued on Apr 5, 2018. Check the license (Iowa DO-05825, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Ian J. Stock
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- DO-05825 IA
71783 WI
Self-reported in NPPES; status is on the state search - Practice location
- 1830 State Highway 9, Decorah, IA 52101
- Phone
- (563) 382-3140
- Enumerated
- Apr 5, 2018
- Record last updated
- Feb 14, 2023
- Medicare enrollment
- Enrolled (PECOS I20260212000637); accepts Medicare assignment
- Medical or professional school
- Midwestern University, Chicago College Of Osteopathic Med, 2018
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,336 in Iowa → Look up another NPI →
Also registered at 1830 State Highway 9
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Anthony Coppola, DOFamily Medicine Physician1467568766
- Janna Edrington, RNC ARNPWomen's Health Nurse Practitioner1770563546
Verify Ian J. Stock in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license DO-05825Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
30% fewer Medicare Part D claims than the average family medicine physician in 2024
2,464 Medicare Part D claims for 352 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 68 claims were for opioids.
Most prescribed
- Amlodipine Besylate108 claims
- Atorvastatin Calcium105 claims
- Omeprazole96 claims
- Furosemide87 claims
- Metoprolol Succinate71 claims
- Prednisone62 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 3 group practices
- Gundersen Clinic LtdDecorah, IA
- Gundersen Lutheran Medical Center IncWinona, MN
- Gundersen Regional Clinics, LLCDecorah, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ian J. Stock among 2,336 family medicine physician records in Iowa
Ian J. Stock, DO 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 2018, is newer than 80% of them.
- NPI issued2018 · 80% of these records are older, 18% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2018 · median 2006 among the 1,367 with a school on file
- Record last updated2023 · 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).
25 family medicine physician records list a practice address in Decorah
They are 25 of the 282 NPPES records with a practice address in Decorah, and 2,336 family medicine physician records in Iowa.
All 2,336 in Iowa → Every provider in Decorah → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Anthony Coppola, DODecorah, IA 521011467568766
- Tedd Gentry, M.D.Decorah, IA 521011902804529
- Andy Goodner, MDDecorah, IA 521011548214190
- Kevin Locke, M.D.Decorah, IA 521011427052877
- James Ott, M.D.Decorah, IA 521011871572057
- Paul Pellett, MDDecorah, IA 521011689676926
- Max Quaas, M.D.Decorah, IA 521011649237298
- Janet Ryan, MDDecorah, IA 521011972507895
Common questions
What is Ian J. Stock, DO's NPI number?
Ian J. Stock, DO's National Provider Identifier (NPI) is 1326544537, issued on Apr 5, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Ian J. Stock, DO located?
The NPPES record lists a practice address at 1830 State Highway 9, Decorah, IA, 52101. Phone: (563) 382-3140. Providers update this record themselves, so call before visiting.
How can I verify Ian J. Stock, DO's license?
NPPES lists Iowa license number DO-05825, 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 J. Stock, DO prescribe under Medicare Part D?
In 2024, Ian J. Stock, DO had 2,464 Medicare Part D claims for 352 beneficiaries; 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.