Ilka Decker, M.D.
Nephrology Physician · Ann Arbor, MI
Ilka Decker, M.D. is a nephrology physician with a practice address in Ann Arbor, Michigan, and NPI 1891138616, issued on Apr 11, 2013. Check the license (Michigan 4301109103, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Ilka Decker
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- 4301109103 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1500 East Medical Center Dr, Ann Arbor, MI 48109
- Phone
- (734) 936-5548
- Enumerated
- Apr 11, 2013
- Record last updated
- Feb 5, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20181206000158); accepts Medicare assignment
- Medical or professional school
- Clvlnd Clinic Lerner College Of Med Of Case Wstn Rsv University, 2013
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 376 in Michigan → Look up another NPI →
Also registered at 1500 East Medical Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Gaury Adhikary, MDAnesthesiology Physician1629094297
- Jeremy Adler, MDPediatric Gastroenterology Physician1033243191
Verify Ilka Decker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301109103Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
54% fewer Medicare Part D claims than the average nephrology physician in 2024
667 Medicare Part D claims for 99 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Most prescribed
- Amlodipine Besylate74 claims
- Potassium Citrate Er58 claims
- Losartan Potassium41 claims
- Potassium Chloride38 claims
- Lisinopril35 claims
- Allopurinol33 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
- Regents OF The University OF MichiganAnn Arbor, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ilka Decker among 376 nephrology physician records in Michigan
Ilka Decker, M.D. is one of 376 nephrology physician records with a practice address in Michigan. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 84% of them.
- NPI issued2013 · 84% of these records are older, 15% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2013 · median 2001 among the 279 with a school on file
- Record last updated2020 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Michigan
There are 376 nephrology physician records in Michigan.
All 376 in Michigan → Every provider in Ann Arbor → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Farsad Afshinnia, MDAnn Arbor, MI 481091164487161
- Mona Doshi, MDAnn Arbor, MI 481091215974712
- Harvey Humes, M.D.Ann Arbor, MI 481091386734119
- Matthias Kretzler, MDAnn Arbor, MI 481091710990916
- Sanjeevkumar Patel, MDAnn Arbor, MI 481091346322252
- Subramaniam Pennathur, MDAnn Arbor, MI 481091861405185
- Bruce Robinson, MD, MSAnn Arbor, MI 481091154402360
- Rajiv Saran, MB, BSAnn Arbor, MI 481091144302068
Common questions
What is Ilka Decker, M.D.'s NPI number?
Ilka Decker, M.D.'s National Provider Identifier (NPI) is 1891138616, issued on Apr 11, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Ilka Decker, M.D. located?
The NPPES record lists a practice address at 1500 East Medical Center Dr, Ann Arbor, MI, 48109. Phone: (734) 936-5548. Providers update this record themselves, so call before visiting.
How can I verify Ilka Decker, M.D.'s license?
NPPES lists Michigan license number 4301109103, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ilka Decker, M.D. prescribe under Medicare Part D?
In 2024, Ilka Decker, M.D. had 667 Medicare Part D claims for 99 beneficiaries; the average among nephrology physician prescribers was 1,465. 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.