Quick answers
- Where does Gregory Krastein see patients?
- Medicare's clinician data lists 3 practice locations, including Oxnard, CA, Woodland Hills, CA and Ventura, CA. Call before your visit to confirm the address.
- What is Gregory Krastein's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Gregory Krastein accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory Krastein 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 Gregory Krastein offer telehealth?
- Medicare's clinician data says Gregory Krastein offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Gregory Krastein?
- (805) 988-6300, as listed in official Medicare / NPI Registry data.
- What is Gregory Krastein's NPI number?
- 1942358759. 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 Gregory Krastein is enrolled with Medicare (CMS data updated 2026-10-02).
- 2103 E Gonzales RdOxnard, CA 93036 (805) 988‑6300
- 5601 De Soto AveWoodland Hills, CA 91367 (818) 719‑2000
- 888 S Hill RdVentura, CA 93003 (805) 477‑6400
Group practices
Medicare enrollment lists Gregory Krastein as a member of this group (CMS data updated 2026-10-02).
- Southern California Permanente Medical Group11,293 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Oxnard
Clinicians with the same Medicare primary specialty in Oxnard, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | George Washington University School Of Medicine |
| Graduation year | 1990 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1942358759 |
| 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