YAS CASEY
NPI 1336568971
Internal Medicine in Loma Linda, CA
About Yas Casey NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
YAS CASEY (NPI 1336568971) is an individual internal medicine provider in Loma Linda, California, licensed in California (A149800) and active in the NPI registry since April 2014. He is enrolled in Medicare PECOS and is a graduate of Other (2009).
NPPES Registry Identity
Specialties & Licenses 2
Other Names 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
Yas Casey 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 Reassignments
4Medicare enrollment records show Yas Casey reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Redlands, CA 92373
- Reassigned Medicare billing, California enrollment
- 241 clinicians in this Medicare group
Riverside, CA 92501
- Reassigned Medicare billing, California enrollment
- 48 clinicians in this Medicare group
Riverside, CA 92501
- Reassigned Medicare billing, California enrollment
- 54 clinicians in this Medicare group
Riverside, CA 92506
- Reassigned Medicare billing, California enrollment
- 7 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 3
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92357 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Yas Casey's NPI number?
The NPI number for Yas Casey is 1336568971. It was assigned to this individual provider in the NPPES registry on April 10, 2014. The provider is also known as Yassir Al-Darwash.
Where is Yas Casey located?
Yas Casey practices at 11201 Benton St # 2e37a, Loma Linda, CA 92357. The listed phone number is (909) 825-7084.
What is Yas Casey's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Yas Casey enrolled in Medicare?
Yes. Yas Casey 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 organizations bill Medicare for Yas Casey's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Yas Casey reassigns Medicare benefits to 4 organizations: Darin Rentz Do PC (Redlands, CA), Alertive Healthcare Medical Group Apc (Riverside, CA), Providence Healthcare Partners,, Inc (Riverside, CA) and Grace Medical And Wellness Clinic (Riverside, 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 Yas Casey'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 Yas Casey was last updated on January 30, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Yas Casey · NPI 1336568971
Internal Medicine physician in Loma Linda, California. Individual provider, active in the CMS NPPES registry since April 10, 2014.
## Identity
- **NPI:** 1336568971 (Entity type: Individual)
- **Enumerated:** April 10, 2014
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A149800 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 11201 BENTON ST # 2E37A, Loma Linda, CA 92357-2153
- **Phone:** (909) 825-7084
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Darin Rentz Do PC (NPI 1689321747, Redlands, CA); Alertive Healthcare Medical Group Apc (NPI 1467024331, Riverside, CA); Providence Healthcare Partners,, Inc (NPI 1699157701, Riverside, CA); Grace Medical And Wellness Clinic (NPI 1689357030, Riverside, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2009
## Record status
- **NPPES last updated:** January 30, 2020
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Source: [NPI Profile](https://npiprofile.com/npi/1336568971) · Data from the CMS NPPES public registry.