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Obstetrics/Gynecology

Michelle A. Marine, MD

Works at hospitals in Simi Valley, CA · Thousand Oaks, CA · California

Summary

Dr. Michelle A. Marine, MD is an OB-GYN at 2901 N Ventura Rd, Suite 110, Oxnard, CA 93036. Phone: (805) 981-6163. Accepts Medicare assignment. In 2024, Michelle A. Marine had 157 Original Medicare patients and 475 services. NPI 1114976149. 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.

  • Specialty: OB-GYN (Medicare lists Obstetrics/Gynecology)
  • Address: 2901 N Ventura Rd, Suite 110, Oxnard, CA 93036 · Directions (1 more location)
  • Phone: (805) 981‑6163
  • Medicare: Accepts Medicare assignment
  • Hospitals: Adventist Health Simi Valley, Los Robles Hospital & Medical Center
  • Group practice: Pacific Central Coast Health Centers
  • Medical school: University Of California, San Diego School Of Medicine · graduated 1988 (38 years since medical school)
  • Gender (as listed): Female

From official Medicare data

This page shows what Medicare's official clinician data says about Michelle A. Marine, 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 Michelle A. Marine accept Medicare assignment?
Yes. Medicare's clinician data says Michelle A. Marine 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 Michelle A. Marine see?
In 2024, CMS data shows 157 Original Medicare patients and 475 services for Michelle A. Marine. This counts Original Medicare only and measures volume, not quality.
What is Michelle A. Marine's NPI number?
1114976149. 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 Michelle A. Marine, 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 patients157
Services billed to Medicare475
Different services or procedures25
Participating Medicare providerYes
Average age of these patients74

Most frequent services

  1. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)96 services
  2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)85 services
  3. Stool analysis for blood to screen for colon tumors (82270)73 services
  4. Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)68 services
  5. Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory (Q0091)56 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 pressure61%
  • Arthritis46%
  • Osteoporosis37%
  • Diabetes18%
  • Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)17%

Hospitals where Michelle A. Marine works

Medicare's Facility Affiliation Data lists Michelle A. Marine 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.

  • Adventist Health Simi ValleySimi Valley, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050236
  • Los Robles Hospital & Medical CenterThousand Oaks, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050549

Practice locations

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

Group practices

Medicare enrollment lists Michelle A. Marine as a member of this group (CMS data updated October 2, 2026).

  • Pacific Central Coast Health Centers253 clinicians in the group

Specialties

Find other Obstetrics/Gynecology doctors in California →

Other OB-GYNs in Oxnard

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

All OB-GYNs in Oxnard →

Other clinicians in Pacific Central Coast Health Centers

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

Clinician information

CredentialMD
Medical schoolUniversity Of California, San Diego School Of Medicine
Graduation year1988 (38 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1114976149
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