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Dr. Sofya Zak, APRN

Pediatric Nephrology (Pediatric Nephrology Physician)

225 E Chicago Ave
Chicago, IL 60611

Who else practices at this address →

Cook County includes primary care (3% of residents) and mental health (4% of residents) shortage areas. About shortage areas

Call (800) 543-7362

At a glance

In the NPI registry since
2022

The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. What an NPI is

Education and training

  • 2022Registered with an NPI (national billing number; not a license date)

Medicare’s Care Compare data doesn’t list this clinician’s medical school. Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).

Specialties and state licenses

  • Pediatric Nephrology Physician primary
    IL license 209026067

As reported to the NPI registry. To confirm a license is current, check the state medical board.

Map: Pediatric Nephrology per capita by county →

Medicare prescriptions

Most prescribed drugs, Medicare Part D 2024
DrugPrescriptions
Tacrolimus
Other prescribers in Chicago, IL
22
Katerzia (amlodipine benzoate)11
Sulfamethoxazole-Trimethoprim (sulfamethoxazole/trimethoprim)
Other prescribers in Chicago, IL
11

Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.

Other Pediatric Nephrology clinicians in Chicago

Sources

NPI registry (CMS NPPES, November 2026; record last updated November 7, 2022), Medicare Care Compare, Medicare Physician & Other Practitioners (2024), Medicare Part D Prescribers (2024) and Open Payments (2025). Information is self-reported or billed data and may be out of date; call before visiting.

NPI 1699483990. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.