MRS. CHOI HYANGSOOK SIEGEL NP
NPI 1912236001
Nurse Practitioner - Gerontology in Pasadena, CA
About Mrs. Choi Hyangsook Siegel Np NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MRS. CHOI HYANGSOOK SIEGEL NP (NPI 1912236001) is an individual gerontology provider in Pasadena, California, licensed in California (19272) and active in the NPI registry since December 2009. She is enrolled in Medicare PECOS and is a graduate of Other (2009).
NPPES Registry Identity
Specialties & Licenses
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
Mrs. Choi Hyangsook Siegel Np 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 Choi Siegel reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Los Angeles, CA 90041
- Reassigned Medicare billing, California enrollment
- Also billed through NPI 1396287082 (California)
- 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 91105 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
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
PASADENA, CA 91105
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 Choi Siegel's NPI number?
The NPI number for Choi Siegel is 1912236001. It was assigned to this individual provider in the NPPES registry on December 18, 2009.
Where is Choi Siegel located?
Choi Siegel practices at 301 S Fair Oaks Ave Ste 300, Pasadena, CA 91105. The listed phone number is (818) 472-0428.
What is Choi Siegel's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Gerontology, with taxonomy code 363LG0600X.
Is Choi Siegel enrolled in Medicare?
Yes. Choi Siegel 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 Choi Siegel's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Choi Siegel reassigns Medicare benefits to Southern California Permanente Medical Group (Los Angeles, 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 Choi Siegel'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 Choi Siegel was last updated on December 1, 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.
# Mrs. Choi Hyangsook Siegel, NP · NPI 1912236001
Gerontology physician in Pasadena, California. Individual provider, active in the CMS NPPES registry since December 18, 2009.
## Identity
- **NPI:** 1912236001 (Entity type: Individual)
- **Enumerated:** December 18, 2009
- **Primary specialty:** Nurse Practitioner - Gerontology · taxonomy 363LG0600X
- **State license:** 19272 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 301 S FAIR OAKS AVE STE 300, Pasadena, CA 91105-2562
- **Phone:** (818) 472-0428
## 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 1013409044, Los Angeles, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2009
## Record status
- **NPPES last updated:** December 1, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1912236001) · Data from the CMS NPPES public registry.