Ali O. Maamar-Tayeb, MD

Medicare activity in 2024

Official CMS public-use data for Ali O. Maamar-Tayeb, 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. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)65 services
2. Needle measurement of electrical activity in arm or leg muscles, complete study (95886)43 services
3. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)36 services
4. Needle measurement of electrical activity in arm or leg muscles, limited study (95885)34 services
5. Nerve conduction, 7-8 studies (95910)17 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%
• Arthritis70%
• Diabetes49%
• Stroke or mini-stroke45%
• Depression38%

Hospitals where Ali O. Maamar-Tayeb works

Medicare's Facility Affiliation Data lists Ali O. Maamar-Tayeb 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.

• Ventura County Medical CenterVentura, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050159

Practice locations

Addresses where Ali O. Maamar-Tayeb is enrolled with Medicare (CMS data updated October 2, 2026).

• 300 Hillmont AveVentura, CA 93003 (805) 654‑3306

Group practices

Medicare enrollment lists Ali O. Maamar-Tayeb as a member of this group (CMS data updated October 2, 2026).

• County of Ventura344 clinicians in the group

Specialties

• Neurologyprimary

Find other Neurology doctors in California →

Other neurologists in Ventura

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

• Russell T. Powell, MD
• Mariam M. Rangwala, MD
• Scot J. Richardson, MD
• Nina M. Long, DO

All neurologists in Ventura →

Other clinicians in County of Ventura

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

• Juan S. Vega Jr., MD
• Shari A. Madison
• Frederic J. Leong, MD
• Zachary M. Zwolak, DO
• Kristen Reid, CSW
• John Nuhn, 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