Quick answers
- Where does Marcus L. Sickelton see patients?
- Medicare's clinician data lists 4 practice locations, including Ventura, CA, Santa Maria, CA and Santa Barbara, CA. Call before your visit to confirm the address.
- What is Marcus L. Sickelton's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Marcus L. Sickelton accept Medicare assignment?
- Yes. Medicare's clinician data says Marcus L. Sickelton 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.
- What is the phone number for Marcus L. Sickelton?
- (805) 290-4985, as listed in official Medicare / NPI Registry data.
- What is Marcus L. Sickelton's NPI number?
- 1245843143. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Marcus L. Sickelton is enrolled with Medicare (CMS data updated 2026-10-02).
- 1708 S Victoria Ave, Suite DVentura, CA 93003 (805) 290‑4985
- 1846 N Broadway, Suite ASanta Maria, CA 93454 (805) 361‑4279
- 3885 State St, Suite ASanta Barbara, CA 93105 (805) 569‑7351
- 777 E Foothill BlvdSan Luis Obispo, CA 93405 (805) 762‑4348
Group practices
Medicare enrollment lists Marcus L. Sickelton as a member of this group (CMS data updated 2026-10-02).
- Cottage Clinical Network LLC56 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Ventura
Clinicians with the same Medicare primary specialty in Ventura, CA — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2020 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1245843143 |
| 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
- 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