DR. GIGI JA NEA SIMMONS MD
NPI 1891288957
Family Medicine - Addiction Medicine in Los Angeles, CA
About Dr. Gigi Ja Nea Simmons Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. GIGI JA NEA SIMMONS MD (NPI 1891288957) is an individual addiction medicine provider in Los Angeles, California, licensed in California (A173667) and active in the NPI registry since June 2018. She is enrolled in Medicare PECOS and is a graduate of Other (2015).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Gigi Ja Nea Simmons Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Gigi Simmons reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Los Angeles, CA 90059
- Reassigned Medicare billing, California enrollment
- 435 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 90059 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.
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 Gigi Simmons's NPI number?
The NPI number for Gigi Simmons is 1891288957. It was assigned to this individual provider in the NPPES registry on June 12, 2018.
Where is Gigi Simmons located?
Gigi Simmons practices at 1670 E 120th St, Los Angeles, CA 90059. The listed phone number is (424) 338-1000.
What is Gigi Simmons's specialty?
The primary specialty registered for this NPI is Family Medicine, specializing in Addiction Medicine, with taxonomy code 207QA0401X.
Is Gigi Simmons enrolled in Medicare?
Yes. Gigi Simmons is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Gigi Simmons's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gigi Simmons reassigns Medicare benefits to County Of Los Angeles (Los Angeles, CA). The 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 Gigi Simmons's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Gigi Simmons was last updated on October 6, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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. Gigi Ja Nea Simmons, MD · NPI 1891288957
Addiction Medicine physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since June 12, 2018.
## Identity
- **NPI:** 1891288957 (Entity type: Individual)
- **Enumerated:** June 12, 2018
- **Primary specialty:** Family Medicine - Addiction Medicine · taxonomy 207QA0401X
- **State license:** A173667 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1670 E 120TH ST, Los Angeles, CA 90059-3026
- **Phone:** (424) 338-1000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** County Of Los Angeles (NPI 1780877613, Los Angeles, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2015
## Record status
- **NPPES last updated:** October 6, 2022
---
Source: [NPI Profile](https://npiprofile.com/npi/1891288957) · Data from the CMS NPPES public registry.