DR. DEREK M PARKER PSY.D.
NPI 1568690923
Psychologist in Winfield, KS
About Dr. Derek M Parker Psy.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DEREK M PARKER PSY.D. (NPI 1568690923) is an individual psychologist in Winfield, Kansas, licensed in Kansas (2981) and active in the NPI registry since June 2009. He is enrolled in Medicare PECOS, maintains a secondary practice location in Newton, and is a graduate of Other (2015).
NPPES Registry Identity
Specialties & Licenses 9
Secondary Practice Location 1
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. Derek M Parker Psy.d. 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 Derek Parker reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Wichita, KS 67207
- Reassigned Medicare billing, Kansas enrollment
- 8 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.
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 Derek Parker's NPI number?
The NPI number for Derek Parker is 1568690923. It was assigned to this individual provider in the NPPES registry on June 24, 2009.
Where is Derek Parker located?
Derek Parker practices at 33354 D Street, Winfield, KS 67301. The listed phone number is (620) 331-1748.
What is Derek Parker's specialty?
The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.
Is Derek Parker enrolled in Medicare?
Yes. Derek Parker 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 Derek Parker's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Derek Parker reassigns Medicare benefits to Ralph Bharati, MD, PA (Wichita, KS). 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 Derek Parker'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 Derek Parker was last updated on July 10, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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.