John Friedewald, MD
Nephrology Physician · Chicago, IL
John Friedewald, MD is a nephrology physician with a practice address in Chicago, Illinois, and NPI 1508801093, issued on Jun 18, 2006. Check the license (Illinois 036113031, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- John Friedewald
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- 036113031 IL
Self-reported in NPPES; status is on the state search - Practice location
- 675 N Saint Clair St, Chicago, IL 60611
- Phone
- (312) 695-8900
- Enumerated
- Jun 18, 2006
- Record last updated
- Jul 6, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (312) 695-9194
- Medicaid ID
- 036113031 IL
- Medicare enrollment
- Enrolled (PECOS I20050318000137); accepts Medicare assignment
- Medical or professional school
- Columbia University College Of Physicians And Surgeons, 1998
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 572 in Illinois → Look up another NPI →
Also registered at 675 N Saint Clair St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Friedewald 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 036113031Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
9% fewer Medicare Part D claims than the average nephrology physician in 2024
1,334 Medicare Part D claims for 223 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D.
Most prescribed
- Sulfamethoxazole-Trimethoprim447 claims
- Prednisone157 claims
- Carvedilol72 claims
- Amlodipine Besylate59 claims
- Tacrolimus58 claims
- Famotidine55 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.
The MIPS final score for 2023 (Medicare payment program): 94.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $29,815.17
17 payments; by number, the most common kind was travel and lodging; the largest payer was Sanofi-Aventis U.S. LLC. The 8,230 providers of this specialty with any payment received $3,091.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Northwestern Medical Faculty FoundationChicago, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Friedewald among 572 nephrology physician records in Illinois
John Friedewald, 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
- Graduated1998 · 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 Chicago → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Shubhada Ahya, MDChicago, IL 606111336138767
- Mohammed Javeed Ansari, M.D.Chicago, IL 606111487688131
- Daniel Battle, MDChicago, IL 606111457325037
- Eudora Eng, M.D.Chicago, IL 606111639261621
- Lorenzo Gallon, MDChicago, IL 606111427093848
- Cybele Ghossein, MDChicago, IL 606111376588830
- Bing Ho, MDChicago, IL 606111881771731
- Tamara Isakova, MDChicago, IL 606111902879778
Common questions
What is John Friedewald, MD's NPI number?
John Friedewald, MD's National Provider Identifier (NPI) is 1508801093, issued on Jun 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Friedewald, MD located?
The NPPES record lists a practice address at 675 N Saint Clair St, Chicago, IL, 60611. Phone: (312) 695-8900. Providers update this record themselves, so call before visiting.
How can I verify John Friedewald, MD's license?
NPPES lists Illinois license number 036113031, 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 John Friedewald, MD prescribe under Medicare Part D?
In 2024, John Friedewald, MD had 1,334 Medicare Part D claims for 223 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
What is John Friedewald, MD's MIPS final score?
The 2023 MIPS final score is 94.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.