ILKA LOUISE DE GAST PSYD
NPI 1649576851
Psychologist in Santa Rosa, CA
About Ilka Louise De Gast Psyd NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ILKA LOUISE DE GAST PSYD (NPI 1649576851) is an individual psychologist in Santa Rosa, California, licensed in California (PSY24409) and active in the NPI registry since February 2011. She is enrolled in Medicare PECOS and is a graduate of Other (2007).
NPPES Registry Identity
Specialties & Licenses 2
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
Ilka Louise De Gast Psyd 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 Reassignment
Medicare enrollment records show Ilka De Gast reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Santa Rosa, CA 95403
- Reassigned Medicare billing, California enrollment
- 215 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.
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.
SANTA ROSA, CA 95403
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 Ilka De Gast's NPI number?
The NPI number for Ilka De Gast is 1649576851. It was assigned to this individual provider in the NPPES registry on February 4, 2011.
Where is Ilka De Gast located?
Ilka De Gast practices at 3569 Round Barn Cir, Santa Rosa, CA 95403. The listed phone number is (707) 547-2222.
What is Ilka De Gast's specialty?
The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.
Is Ilka De Gast enrolled in Medicare?
Yes. Ilka De Gast 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 organization bills Medicare for Ilka De Gast's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ilka De Gast reassigns Medicare benefits to Santa Rosa Community Health Centers (Santa Rosa, 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 Ilka De Gast'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 Ilka De Gast was last updated on May 13, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.