Hamid R. Nasseri, DO

Medicare activity in 2024

Official CMS public-use data for Hamid R. Nasseri, 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.

Most frequent services

1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)1,892 services
2. Critical care, first 30-74 minutes (99291)374 services
3. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)309 services
4. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)170 services
5. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)41 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 blood pressure75%
• High cholesterol75%
• Ischemic heart disease75%
• Heart failure71%
• Arthritis67%
• Diabetes63%

Hospitals where Hamid R. Nasseri works

Medicare's Facility Affiliation Data lists Hamid R. Nasseri 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.

• Northridge Hospital Medical CenterNorthridge, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050116

Practice locations

Addresses where Hamid R. Nasseri is enrolled with Medicare (CMS data updated October 2, 2026).

• 18300 Roscoe BlvdNorthridge, CA 91325 (818) 885‑8500

Group practices

Medicare enrollment lists Hamid R. Nasseri as a member of these groups (CMS data updated October 2, 2026).

• Compassionate Critical Care Group, Inc.14 clinicians in the group
• Vital Lungs Associates of Southern California Inc3 clinicians in the group

Specialties

• Internal Medicineprimary
• Critical Care (Intensivists)also
• Pulmonary Diseasealso

Find other Internal Medicine doctors in California →

Other internal medicine doctors in Northridge

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

• Jeremy I. Grosser, MD
• Samuel S. Feizi, MD
• Siamak P. Etehad, MD
• William Yang, MD
• Mehrnaz Hadian, MD
• Fariba Javaherian, MD
• Masoud M. Azizad, MD
• Lilly L. Wilen, MD

All internal medicine doctors in Northridge →

Other clinicians in Compassionate Critical Care Group, Inc.

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

• Neha Mehta, DO
• Mehrnaz Hadian, MD
• Gary K. Kong, MD
• Norair Adjamian, DO
• Sheliza Kabani, MD
• Ali Atabaki, MD

Clinician information

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