Margaret A. Peterson, MD

Medicare activity in 2024

Official CMS public-use data for Margaret A. Peterson, 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. Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month (99490)340 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)231 services
3. Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days (99454)224 services
4. Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month (99439)197 services
5. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)111 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 pressure70%
• High cholesterol70%
• Arthritis39%
• Ischemic heart disease39%
• Anxiety23%
• Depression22%

Hospitals where Margaret A. Peterson works

Medicare's Facility Affiliation Data lists Margaret A. Peterson 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.

• Community Memorial Hospital - VenturaVentura, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050394

Practice locations

Addresses where Margaret A. Peterson is enrolled with Medicare (CMS data updated October 2, 2026).

• 3555 Loma Vista Rd, Suite 215Ventura, CA 93003 (805) 643‑2895

Specialties

• Family Practiceprimary

Find other Family Practice doctors in California →

Other family doctors in Ventura

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

• James E. Hermann, MD
• Stanley C. Patterson, MD
• Matthew B. McCreary, MD
• Thomas J. Dunlop, MD
• Margaret E. Purnell, MD
• Amir-Mohammad Jalilian-Nosraty, MD
• Flor Mounts, MD
• Agustin J. Lara, MD

All family doctors in Ventura →

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