Mahtab Moshtagh Sisan, MD

Medicare activity in 2024

Official CMS public-use data for Mahtab Moshtagh Sisan, 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. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)372 services
2. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)133 services
3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)91 services
4. Sleep study including heart rate, breathing, airflow, and effort (95806)46 services
5. Sleep study including heart rate, breathing, and sleep time (95800)45 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%
• Arthritis61%
• Ischemic heart disease40%
• Diabetes37%
• Anxiety34%

Hospitals where Mahtab Moshtagh Sisan works

Medicare's Facility Affiliation Data lists Mahtab Moshtagh Sisan 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.

• Henry Mayo Newhall HospitalValencia, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: not listed by Medicare · CCN 050624
• Ronald Reagan UCLA Medical CenterLos Angeles, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050262

Practice locations

Addresses where Mahtab Moshtagh Sisan is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 9; the Medicare profile lists all.

• 100 Moody Ct, Suite 200Thousand Oaks, CA 91360 (805) 418‑3500
• 10833 Le Conte AveLos Angeles, CA 90095 (310) 825‑7271
• 1223 16th StSanta Monica, CA 90404 (424) 259‑8859
• 1223 16th St, Suite 2101Santa Monica, CA 90404 (424) 259‑8859
• 19950 Rinaldi StPorter Ranch, CA 91326

Group practices

Medicare enrollment lists Mahtab Moshtagh Sisan as a member of this group (CMS data updated October 2, 2026).

• The Regents of the University of California1,462 clinicians in the group

Specialties

• Family Practiceprimary
• Sleep Medicinealso

Find other Family Practice doctors in California →

Other family doctors in Thousand Oaks

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

• Rebecca B. Cho, DO
• Roberta Obadia, MD
• Diana Naderi, MD
• Andrea A. Cise, MD
• Maeve Lin, DO
• Lina Hadj Smaine, DO
• Sarah Yang, MD
• Hiren H. Swami, MD

All family doctors in Thousand Oaks →

Other clinicians in The Regents of the University of California

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

• Anjay Rastogi, MD
• Abigail E. Maller, MD
• Abraham Lin, MD
• William B. Finch, MD
• Fred P. Rosenfelt, MD
• Russell A. Johnson, 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