Ilka Decker, M.D.
NPI 1891138616 · Nephrology Physician · Ann Arbor, MI
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ilka Decker, M.D. is a Nephrology Physician provider in Ann Arbor, MI (NPI 1891138616).
Provider details
- NPI number
- 1891138616
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 4301109103 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
13 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
498 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 139 | $351 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 130 | $119 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 77 | $16 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 71 | $79 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 46 | $98 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 74 | 27 |
| Potassium Citratebrand: Potassium Citrate Er | 58 | 15 |
| Losartan Potassium | 41 | 14 |
| Potassium Chloride | 38 | — |
| Lisinopril | 35 | — |
| Allopurinol | 33 | — |
| Chlorthalidone | 30 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-04-11
- Last updated
- 2020-02-05
- Certified
- 2020-02-05
Frequently asked questions
- What is Ilka Decker's NPI number?
- Ilka Decker's National Provider Identifier (NPI) is 1891138616, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ilka Decker's specialty?
- Ilka Decker is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Ilka Decker located?
- Ilka Decker's practice location on file with NPPES is 1500 East Medical Center Dr, Ann Arbor, MI 48109-5364.
- What is Ilka Decker's phone number?
- The practice phone number listed in the NPPES registry for Ilka Decker is (734) 936-5548.
- Does Ilka Decker accept Medicare?
- Ilka Decker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ilka Decker's NPI active?
- Yes — Ilka Decker's NPI (1891138616) is active in the NPPES registry as of the last update on 2020-02-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.