Joanna M. Niemiec, MD
Nephrology Physician · Rockford, IL
Joanna M. Niemiec, MD is a nephrology physician with a practice address in Rockford, Illinois, and NPI 1821016791, issued on Jul 18, 2006. Check the license (Illinois 036110673, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Joanna M. Niemiec
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- 036110673 IL
Self-reported in NPPES; status is on the state search - Practice location
- 612 Roxbury Road, Rockford, IL 61107
- Phone
- (815) 227-8300
- Enumerated
- Jul 18, 2006
- Record last updated
- Jul 9, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (815) 227-8301
- Medicaid IDs
- 036110673 IL
34766600 WI - Medicare enrollment
- Enrolled (PECOS I20061113000101); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 572 in Illinois → Look up another NPI →
Also registered at 612 Roxbury Road
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mashood Ahmad, MDNephrology Physician1043232846
- David Wright, MDNephrology Physician1033131776
Verify Joanna M. Niemiec in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036110673Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% more Medicare Part D claims than the average nephrology physician in 2024
2,530 Medicare Part D claims for 546 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Calcitriol753 claims
- Furosemide253 claims
- Amlodipine Besylate116 claims
- Losartan Potassium109 claims
- Farxiga105 claims
- Vitamin D2103 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
- Rna OF Rockford, PLLCBeloit, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joanna M. Niemiec among 572 nephrology physician records in Illinois
Joanna M. Niemiec, MD is one of 572 nephrology physician records with a practice address in Illinois. 87% 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 12% of them.
- NPI issued2006 · 12% of these records are older, 54% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated1997 · median 2002 among the 433 with a school on file
- Record last updated2009 · 39% 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 Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Illinois
There are 572 nephrology physician records in Illinois.
All 572 in Illinois → Every provider in Rockford → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Mashood Ahmad, MDRockford, IL 611071043232846
- Arooj Fatima, M.DRockford, IL 611071720437338
- Stephen KemneleRockford, IL 611071992180806
- Krishna K R Manda, MDRockford, IL 611071558593095
- John Maynard, MDRockford, IL 611071730180878
- Muamer Mulasmajic, APNRockford, IL 611071326526716
- Charlene Murdakes, MDRockford, IL 611071992961593
- Bindu Pavithran, MDRockford, IL 611071548210677
Common questions
What is Joanna M. Niemiec, MD's NPI number?
Joanna M. Niemiec, MD's National Provider Identifier (NPI) is 1821016791, issued on Jul 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Joanna M. Niemiec, MD located?
The NPPES record lists a practice address at 612 Roxbury Road, Rockford, IL, 61107. Phone: (815) 227-8300. Providers update this record themselves, so call before visiting.
How can I verify Joanna M. Niemiec, MD's license?
NPPES lists Illinois license number 036110673, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Joanna M. Niemiec, MD prescribe under Medicare Part D?
In 2024, Joanna M. Niemiec, MD had 2,530 Medicare Part D claims for 546 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.