Quick answers
- Which hospitals does Karen L. Simon work at?
- Medicare's official clinician data lists Karen L. Simon at 1 hospital: St Johns Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Karen L. Simon see patients?
- Medicare's clinician data lists 5 practice locations, including Oxnard, CA, Camarillo, CA and La Jolla, CA. Call before your visit to confirm the address.
- What is Karen L. Simon's specialty?
- Medicare lists Gastroenterology as the primary specialty.
- Does Karen L. Simon accept Medicare assignment?
- Yes. Medicare's clinician data says Karen L. Simon accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Karen L. Simon offer telehealth?
- Medicare's clinician data says Karen L. Simon offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Karen L. Simon?
- (805) 983-0521, as listed in official Medicare / NPI Registry data.
- What is Karen L. Simon's NPI number?
- 1548384167. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Karen L. Simon works
Medicare's Facility Affiliation Data lists Karen L. Simon at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- St Johns Regional Medical CenterOxnard, CA · Acute Care Hospital · CCN 050082
Practice locations
Addresses where Karen L. Simon is enrolled with Medicare (CMS data updated 2026-10-02).
- 1200 W Gonzales Rd, Suite 100Oxnard, CA 93036 (805) 983‑0521
- 2241 Wankel Way, Suite AOxnard, CA 93030 (805) 983‑0521
- 4005 Mission Oaks Blvd, Suite ACamarillo, CA 93012 (805) 484‑7921
- 4009 Mission Oaks BlvdCamarillo, CA 93012 (805) 484‑7921
- 9850 Genesee Ave, Suite 440La Jolla, CA 92037 (858) 453‑5944
Group practices
Medicare enrollment lists Karen L. Simon as a member of this group (CMS data updated 2026-10-02).
- Genesis Healthcare Partners PC228 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Oxnard
Clinicians with the same Medicare primary specialty in Oxnard, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Northwestern University Feinberg Medical School |
| Graduation year | 2001 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1548384167 |
| Corrections | Report 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians