Quick answers
- Where does Niloufar Guiv see patients?
- Medicare's clinician data lists 3 practice locations, including Thousand Oaks, CA, Westlake Village, CA and West Hills, CA. Call before your visit to confirm the address.
- What is Niloufar Guiv's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Gastroenterology.
- Does Niloufar Guiv accept Medicare assignment?
- Yes. Medicare's clinician data says Niloufar Guiv 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 Niloufar Guiv?
- (805) 497-3239, as listed in official Medicare / NPI Registry data.
- What is Niloufar Guiv's NPI number?
- 1124028345. 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 Niloufar Guiv is enrolled with Medicare (CMS data updated 2026-10-02).
- 3180 Willow Ln, Suite 200Thousand Oaks, CA 91361 (805) 497‑3239
- 3180 Willow Ln, Suite 200Westlake Village, CA 91361
- 7320 Woodlake Ave, Suite 310West Hills, CA 91307 (818) 346‑9911
Group practices
Medicare enrollment lists Niloufar Guiv as a member of these groups (CMS data updated 2026-10-02).
- Genesis Healthcare Partners PC228 clinicians in the group
- Conejo Medical and Breast Care Center a Medical Corporation3 clinicians in the group
Specialties
- Internal Medicineprimary
- Gastroenterologyalso
Other internal medicine doctors in Thousand Oaks
Clinicians with the same Medicare primary specialty in Thousand Oaks, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Maryland School Of Medicine |
| Graduation year | 1989 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1124028345 |
| 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