JOYCE IWEN CHOU M.D.
NPI 1497017503
Internal Medicine in Cerritos, CA
About Joyce Iwen Chou M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOYCE IWEN CHOU M.D. (NPI 1497017503) is an individual internal medicine provider in Cerritos, California, licensed in California (A136869) and active in the NPI registry since June 2012. She is enrolled in Medicare PECOS and is a graduate of Other (2012).
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
Joyce Iwen Chou M.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 Joyce Chou reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Bellflower, CA 90706
- Reassigned Medicare billing, California enrollment
- 13,921 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 90703 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 10
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CERRITOS, CA 90703
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 Joyce Chou's NPI number?
The NPI number for Joyce Chou is 1497017503. It was assigned to this individual provider in the NPPES registry on June 13, 2012.
Where is Joyce Chou located?
Joyce Chou practices at 10820 183rd St, Cerritos, CA 90703. The listed phone number is (800) 823-4040.
What is Joyce Chou's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Joyce Chou enrolled in Medicare?
Yes. Joyce Chou 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 Joyce Chou's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Joyce Chou reassigns Medicare benefits to Southern California Permanente Medical Group (Bellflower, 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 Joyce Chou'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 Joyce Chou was last updated on November 17, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Joyce Iwen Chou, M.D. · NPI 1497017503
Internal Medicine physician in Cerritos, California. Individual provider, active in the CMS NPPES registry since June 13, 2012.
## Identity
- **NPI:** 1497017503 (Entity type: Individual)
- **Enumerated:** June 13, 2012
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A136869 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 10820 183RD ST, Cerritos, CA 90703-8013
- **Phone:** (800) 823-4040
## 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:** Southern California Permanente Medical Group (NPI 1043242555, Bellflower, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2012
## Record status
- **NPPES last updated:** November 17, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1497017503) · Data from the CMS NPPES public registry.