WILLIAM A KOSIK P.T.
NPI 1083662456
Physical Therapist in La Jolla, CA
About William A Kosik P.t. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM A KOSIK P.T. (NPI 1083662456) is an individual physical therapist in La Jolla, California, licensed in California (PT 24845) and active in the NPI registry since May 2006. He is a graduate of University Of California, San Francisco School Of Medicine (1999).
NPPES Registry Identity
Specialties & Licenses
- Diagnose and manage movement dysfunction and enhance physical and functional abilities.
- Restore, maintain, and promote not only optimal physical function but optimal wellness and fitness and optimal quality of life as it relates to movement and health.
- Prevent the onset, symptoms, and progression of impairments, functional limitations, and disabilities that may result from diseases, disorders, conditions, or injuries.
- Treat conditions of the musculoskeletal, neuromuscular, cardiovascular, pulmonary, and/or integumentary systems.
- Address the negative effects attributable to unique personal and environmental factors as they relate to human performance.
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
William A Kosik P.t. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show William Kosik reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Carlsbad, CA 92011
- Reassigned Medicare billing, California enrollment
- 92 clinicians in this Medicare group
Plainfield, IL 60544
- Reassigned Medicare billing, California enrollment
- 53 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 8
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.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Reported Quality Measures
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.
LA JOLLA, CA 92037
LA JOLLA, CA 92037
LA JOLLA, CA 92037
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 William Kosik's NPI number?
The NPI number for William Kosik is 1083662456. It was assigned to this individual provider in the NPPES registry on May 5, 2006.
Where is William Kosik located?
William Kosik practices at 4150 Regents Park Row #365, La Jolla, CA 92037. The listed phone number is (858) 657-8199.
What is William Kosik's specialty?
The primary specialty registered for this NPI is Physical Therapist with taxonomy code 225100000X.
Is William Kosik enrolled in Medicare?
Yes. William Kosik is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for William Kosik's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Kosik reassigns Medicare benefits to 2 organizations: Proactive Physical Therapy & Sports Medicine Inc (Carlsbad, CA) and Dpt Holdings, LLC (Plainfield, IL). 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 William Kosik's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Kosik accept?
Health plans from Oscar Health and Oscar Health Plan, Inc. list William Kosik 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 William Kosik was last updated on July 13, 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.