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

Anesthesiology

Maziar M. Nourian, MD

Works at hospitals in Los Angeles, CA · Santa Monica, CA · California

Summary

Dr. Maziar M. Nourian, MD is an anesthesiologist at 100 Moody Ct, Suite 200, Thousand Oaks, CA 91360. Phone: (805) 418-3500. Accepts Medicare assignment. In 2024, Maziar M. Nourian had 81 Original Medicare patients and 86 services. NPI 1275196305. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

From official Medicare data

This page shows what Medicare's official clinician data says about Maziar M. Nourian, 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 Maziar M. Nourian accept Medicare assignment?
Yes. Medicare's clinician data says Maziar M. Nourian 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.
How many Medicare patients does Maziar M. Nourian see?
In 2024, CMS data shows 81 Original Medicare patients and 86 services for Maziar M. Nourian. This counts Original Medicare only and measures volume, not quality.
What is Maziar M. Nourian's NPI number?
1275196305. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Maziar M. Nourian, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients81
Services billed to Medicare86
Different services or procedures36
Participating Medicare providerYes
Average age of these patients73

Most frequent services

  1. Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)15 services
  2. Anesthesia for other procedure on large bowel using an endoscope (00811)11 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High cholesterol75%
  • High blood pressure73%
  • Arthritis57%
  • Ischemic heart disease37%
  • Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)33%
  • Diabetes30%

Hospitals where Maziar M. Nourian works

Medicare's Facility Affiliation Data lists Maziar M. Nourian 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 Maziar M. Nourian is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Maziar M. Nourian as a member of this group (CMS data updated October 2, 2026).

  • Regents of the University of California236 clinicians in the group

Specialties

Find other Anesthesiology doctors in California →

Other anesthesiologists in Thousand Oaks

Clinicians with the same Medicare primary specialty in Thousand Oaks, CA — not a recommendation.

All anesthesiologists in Thousand Oaks →

Other clinicians in Regents of the University of California

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

Clinician information

CredentialMD
Medical schoolUniversity Of Utah School Of Medicine
Graduation year2019 (7 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1275196305
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. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians