GRETCHEN BAKER
NPI 1861163446
Occupational Therapist in Westlake Village, CA
About Gretchen Baker NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GRETCHEN BAKER (NPI 1861163446) is an individual occupational therapist in Westlake Village, California, licensed in California (19577) and active in the NPI registry since September 2021. She is a graduate of Other (2018).
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)
Gretchen Baker is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Gretchen Baker reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Thousand Oaks, CA 91360
- Reassigned Medicare billing, California enrollment
- 92 clinicians in this Medicare group
Los Angeles, CA 90049
- Reassigned Medicare billing, California enrollment
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Gretchen Baker's NPI number?
The NPI number for Gretchen Baker is 1861163446. It was assigned to this individual provider in the NPPES registry on September 23, 2021.
Where is Gretchen Baker located?
Gretchen Baker practices at 31248 Oak Crest Dr Ste 120, Westlake Village, CA 91361. The listed phone number is (818) 926-9057.
What is Gretchen Baker's specialty?
The primary specialty registered for this NPI is Occupational Therapist with taxonomy code 225X00000X.
Is Gretchen Baker enrolled in Medicare?
Yes. Gretchen Baker is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Gretchen Baker's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gretchen Baker reassigns Medicare benefits to 2 organizations: Feld Care Therapy Inc (Thousand Oaks, CA) and Westside Occupational Therapy Inc (Los Angeles, CA). 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 Gretchen Baker'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 Gretchen Baker was last updated on September 23, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.