Choi Hyangsook Siegel, NP
Gerontology Nurse Practitioner · Pasadena, CA
Choi Hyangsook Siegel, NP is a gerontology nurse practitioner with a practice address in Pasadena, California, and NPI 1912236001, issued on Dec 18, 2009. Check the license (California 19272, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Choi Hyangsook Siegel
- Credential
- NP
- Primary taxonomy
- Gerontology Nurse Practitioner 363LG0600X
- License number
- 19272 CA
Self-reported in NPPES; status is on the state search - Practice location
- 301 S Fair Oaks Ave Ste 300, Pasadena, CA 91105
- Phone
- (818) 472-0428
- Enumerated
- Dec 18, 2009
- Record last updated
- Dec 1, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20101112000421); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest gerontology nurse practitioner records → All 569 in California → Look up another NPI →
Also registered at 301 S Fair Oaks Ave Ste 300
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gia Novell-Kimura, MDEndocrinology, Diabetes & Metabolism Physician1558317834
Verify Choi Hyangsook Siegel in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 19272Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
20% fewer Medicare Part D claims than the average gerontology nurse practitioner in 2024
1,097 Medicare Part D claims for 452 beneficiaries, against an average of 1,369 among the 6,165 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Alendronate Sodium276 claims
- Glipizide202 claims
- Metformin Hcl92 claims
- Metformin Hcl Er78 claims
- Nano 2nd Gen Pen Needle53 claims
- Humulin N Kwikpen51 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupWoodland Hills, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Choi Hyangsook Siegel among 569 gerontology nurse practitioner records in California
Choi Hyangsook Siegel, NP is one of 569 gerontology nurse practitioner records with a practice address in California. 64% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 22% of them.
- NPI issued2009 · 22% of these records are older, 76% newer
- In a Medicare fileYes · 64% of these records are
- In the CMS Doctors and Clinicians fileYes · 42% of these records are
- Graduated2009 · median 2018 among the 239 with a school on file
- Record last updated2021 · 44% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LG0600X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gerontology Nurse Practitioner providers in California
There are 569 gerontology nurse practitioner records in California.
All 569 in California → Every provider in Pasadena → Gerontology Nurse Practitioner nationwide →
The 8 gerontology nurse practitioner records with the nearest ZIP codes
- Georgina Cabrera, RNPPasadena, CA 911051699954867
- Annie Kanchanasuwan, RN, GNP, GCNS-BCPasadena, CA 911051609832385
- Narine Kharikyan, NPPasadena, CA 911051073231239
- Tai Samuels, NPPasadena, CA 911051477853091
- Paulina NowickaShadow Hills, CA 910401326913690
- Carmen Lozano, NPPasadena, CA 911881598070211
- Paul Castro, AGACNP-BCDuarte, CA 910101427769918
- Ashley Farguson, NPDuarte, CA 910101609744135
Common questions
What is Choi Hyangsook Siegel, NP's NPI number?
Choi Hyangsook Siegel, NP's National Provider Identifier (NPI) is 1912236001, issued on Dec 18, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Choi Hyangsook Siegel, NP located?
The NPPES record lists a practice address at 301 S Fair Oaks Ave Ste 300, Pasadena, CA, 91105. Phone: (818) 472-0428. Providers update this record themselves, so call before visiting.
How can I verify Choi Hyangsook Siegel, NP's license?
NPPES lists California license number 19272, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Choi Hyangsook Siegel, NP prescribe under Medicare Part D?
In 2024, Choi Hyangsook Siegel, NP had 1,097 Medicare Part D claims for 452 beneficiaries; the average among gerontology nurse practitioner prescribers was 1,369. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.