Joanna Niemiec, MD
NPI 1821016791 · Nephrology Physician · Rockford, IL
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joanna Niemiec, MD is a Nephrology Physician provider in Rockford, IL (NPI 1821016791).
Provider details
- NPI number
- 1821016791
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 036110673 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 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
4,046 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) |
|---|---|---|
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 832 | $62 |
| 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 | 749 | $16 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 696 | $125 |
| Chronic Care Management Services for Two Or More Chronic Conditions, Additional 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99439 | 466 | $47 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 431 | $77 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 26 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Calcitriol | 753 | 220 |
| Furosemide | 253 | 88 |
| Amlodipine Besylate | 116 | 48 |
| Losartan Potassium | 109 | 43 |
| Dapagliflozin Propanediolbrand: Farxiga | 105 | 28 |
| Ergocalciferol (vitamin D2)brand: Vitamin D2 | 103 | 35 |
| Potassium Chloride | 90 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-18
- Last updated
- 2009-07-09
Frequently asked questions
- What is Joanna Niemiec's NPI number?
- Joanna Niemiec's National Provider Identifier (NPI) is 1821016791, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joanna Niemiec's specialty?
- Joanna Niemiec is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Joanna Niemiec located?
- Joanna Niemiec's practice location on file with NPPES is 612 Roxbury Road, Rockford, IL 61107-5089.
- What is Joanna Niemiec's phone number?
- The practice phone number listed in the NPPES registry for Joanna Niemiec is (815) 227-8300.
- Does Joanna Niemiec accept Medicare?
- Joanna Niemiec is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joanna Niemiec's NPI active?
- Yes — Joanna Niemiec's NPI (1821016791) is active in the NPPES registry as of the last update on 2009-07-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.