Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Nephrology

Nicholas S. Niazi, MD

Works at hospitals in Baltimore, MD · Maryland

Summary

Dr. Nicholas S. Niazi, MD is a nephrologist at 200 E 33rd St, Suite 523, Baltimore, MD 21218. Phone: (410) 235-9382. Accepts Medicare assignment. NPI 1144688862. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026.

From official Medicare data

This page shows what Medicare's official clinician data says about Nicholas S. Niazi, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Nicholas S. Niazi accept Medicare assignment?
Yes. Medicare's clinician data says Nicholas S. Niazi accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
What is Nicholas S. Niazi's NPI number?
1144688862. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Nicholas S. Niazi works

Medicare's Facility Affiliation Data lists Nicholas S. Niazi at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

Practice locations

Addresses where Nicholas S. Niazi is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Nicholas S. Niazi as a member of this group (CMS data updated October 2, 2026).

  • Washington Nephrology Associates LLP35 clinicians in the group

Specialties

Find other Nephrology doctors in Maryland →

Other nephrologists in Baltimore

Clinicians with the same Medicare primary specialty in Baltimore, MD — not a recommendation.

All nephrologists in Baltimore →

Other clinicians in Washington Nephrology Associates LLP

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolGeorgetown University School Of Medicine
Graduation year2016 (10 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1144688862
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  5. Medicare Care Compare — official Medicare tool to look up clinicians