NPPES file of Aug 9, 2026

Ahmed Faraz Siddiqui, D.O.

Nephrology Physician · Chicago, IL

Ahmed Faraz Siddiqui, D.O. is a nephrology physician with a practice address in Chicago, Illinois, and NPI 1235584541, issued on Apr 25, 2016. Check the license (Illinois 036148488, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1235584541
Name
Ahmed Faraz Siddiqui
Credential
D.O.
Primary taxonomy
Nephrology Physician 207RN0300X
License numbers
036148488 IL
02005873A IN
Self-reported in NPPES; status is on the state search
Practice location
1426 W Washington Blvd, Chicago, IL 60607
Phone
(312) 829-1424
Enumerated
Apr 25, 2016
Record last updated
Jul 10, 2020 (not updated in 6 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20190916002577); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 1426 W Washington Blvd

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Chaudhry Hamood Dhillon, MDNephrology Physician1306331277
  2. Jennifer Lazor, D.O.Nephrology Physician1346515871
  3. Karen Rezabek, MMSC, RD, LDNRegistered Dietitian1902015605
  4. Roger Rodby, MDNephrology Physician1043327927
  5. Marvin Sinsakul, M.D.Nephrology Physician1073620936

Verify Ahmed Faraz Siddiqui in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
    Search for license 036148488
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Illinois license search

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67% fewer Medicare Part D claims than the average nephrology physician in 2024

482 Medicare Part D claims for 169 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. 17 claims were for opioids.

  1. Ahmed Siddiqui482
  2. Specialty average1,465

Most prescribed

  1. Prednisone35 claims
  2. Furosemide23 claims
  3. Levofloxacin21 claims
  4. Atorvastatin Calcium20 claims
  5. Spironolactone18 claims
  6. Metoprolol Tartrate17 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.

Industry payments in 2024: $49.67

1 payment: food and beverage; the largest payer was Abiomed. 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.

  1. Ahmed Siddiqui$49.67
  2. Specialty average$3,091.37

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

2 hospitals and group practices

  1. Cgh Medical CenterSterling, IL · Acute Care Hospitals1 of 5 stars
  2. Kidney Specialists OF Illinois, LLCChicago, IL

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

Ahmed Faraz Siddiqui among 572 nephrology physician records in Illinois

Ahmed Faraz Siddiqui, D.O. 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 2016, is newer than 83% of them.

  • NPI issued2016 · 83% of these records are older, 16% newer
  • In a Medicare fileYes · 87% of these records are
  • In the CMS Doctors and Clinicians fileYes · 76% of these records are
  • Graduated2016 · median 2002 among the 433 with a school on file
  • Record last updated2020 · 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.

The 8 nephrology physician records with the nearest ZIP codes

  1. Pravir Baxi, M.D.Chicago, IL 606071780970731
  2. Juan Jose Cintron Garcia, MD, MPHChicago, IL 606071841693728
  3. Chaudhry Hamood Dhillon, MDChicago, IL 606071306331277
  4. William Duffy, MDChicago, IL 606071568448363
  5. Casey Gashti, MDChicago, IL 606071285762252
  6. Paru Kathpalia, MDChicago, IL 606071689864787
  7. Stephen Korbet, MDChicago, IL 606071972608289
  8. Jennifer Lazor, D.O.Chicago, IL 606071346515871

Common questions

What is Ahmed Faraz Siddiqui, D.O.'s NPI number?

Ahmed Faraz Siddiqui, D.O.'s National Provider Identifier (NPI) is 1235584541, issued on Apr 25, 2016. An NPI identifies a provider in billing; it is not a license.

Where is Ahmed Faraz Siddiqui, D.O. located?

The NPPES record lists a practice address at 1426 W Washington Blvd, Chicago, IL, 60607. Phone: (312) 829-1424. Providers update this record themselves, so call before visiting.

How can I verify Ahmed Faraz Siddiqui, D.O.'s license?

NPPES lists Illinois license number 036148488, 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 Ahmed Faraz Siddiqui, D.O. prescribe under Medicare Part D?

In 2024, Ahmed Faraz Siddiqui, D.O. had 482 Medicare Part D claims for 169 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.