DR. GILBERT M. SIMAS MD
NPI 1497802383
Psychiatry & Neurology - Psychiatry in Los Angeles, CA
About Dr. Gilbert M. Simas Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. GILBERT M. SIMAS MD (NPI 1497802383) is an individual psychiatry provider in Los Angeles, California, licensed in California (C178910) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS, maintains 6 additional practice locations, and is a graduate of Other (2004).
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Secondary Practice Locations 6
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Gilbert M. Simas Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
17Medicare enrollment records show Gilbert Simas reassigns Medicare billing to 17 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Westlake Village, CA 91362
- Reassigned Medicare billing, California enrollment
- 87 clinicians in this Medicare group
Laguna Niguel, CA 92677
- Reassigned Medicare billing, California enrollment
- 9 clinicians in this Medicare group
Fresno, CA 93721
- Reassigned Medicare billing, California enrollment
- 99 clinicians in this Medicare group
Gilroy, CA 95020
- Reassigned Medicare billing, California enrollment
- Also billed through NPI 1629301346 (California), NPI 1588721500 (California)
- 2,460 clinicians in this Medicare group
Williams, AZ 86046
- Reassigned Medicare billing, Arizona enrollment
- 36 clinicians in this Medicare group
Coos Bay, OR 97420
- Reassigned Medicare billing, Oregon enrollment
- 327 clinicians in this Medicare group
Salem, OR 97301
- Reassigned Medicare billing, Oregon enrollment
- 42 clinicians in this Medicare group
Sheridan, OR 97378
- Reassigned Medicare billing, Oregon enrollment
- 76 clinicians in this Medicare group
Vancouver, WA 98661
- Reassigned Medicare billing, Washington enrollment
- 76 clinicians in this Medicare group
Vancouver, WA 98686
- Reassigned Medicare billing, Washington enrollment
- 28 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 9
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 90048 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LOS ANGELES, CA 90048
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Gilbert Simas's NPI number?
The NPI number for Gilbert Simas is 1497802383. It was assigned to this individual provider in the NPPES registry on January 4, 2007. The provider is also known as Dr. Gilbert Manuel Simas MD.
Where is Gilbert Simas located?
Gilbert Simas practices at 6500 Wilshire Blvd Fl 19, Los Angeles, CA 90048. The listed phone number is (805) 764-9651.
What is Gilbert Simas's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.
Is Gilbert Simas enrolled in Medicare?
Yes. Gilbert Simas is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Gilbert Simas's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gilbert Simas reassigns Medicare benefits to 17 organizations: Pacific Heritage Medical Group Inc (Westlake Village, CA), Integrative Psychiatry A Medical Corporation (Laguna Niguel, CA), County Of Fresno (Fresno, CA), County Of Santa Clara (Gilroy, CA), Guidance Center Inc (Williams, AZ) and 12 more organizations, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Gilbert Simas's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Gilbert Simas accept?
Health plans from BridgeSpan Health Company, Florida Blue (BlueCross BlueShield FL), Florida Blue HMO (a BlueCross BlueShield FL company), Oscar Health Plan, Inc. and PacificSource Health Plans and 2 other insurers list Gilbert Simas as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Gilbert Simas was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 26 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Gilbert M. Simas, MD · NPI 1497802383
Psychiatry physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since January 4, 2007.
## Identity
- **NPI:** 1497802383 (Entity type: Individual)
- **Enumerated:** January 4, 2007
- **Primary specialty:** Psychiatry & Neurology - Psychiatry · taxonomy 2084P0800X
- **State license:** C178910 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 6500 WILSHIRE BLVD FL 19, Los Angeles, CA 90048-4920
- **Phone:** (805) 764-9651 · **Fax:** (747) 330-1670
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 17 organizations under Medicare reassignment (form CMS-855R): Pacific Heritage Medical Group Inc (NPI 1467899450, Westlake Village, CA); Integrative Psychiatry A Medical Corporation (NPI 1720268980, Laguna Niguel, CA); County Of Fresno (NPI 1174606420, Fresno, CA); County Of Santa Clara (NPI 1922093533, Gilroy, CA); Guidance Center Inc (NPI 1316014459, Williams, AZ); and 12 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2004
## Record status
- **NPPES last updated:** September 29, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1497802383) · Data from the CMS NPPES public registry.