Hanbyul Choi
Internal Medicine Physician · Rolling Hills Estates, CA
Hanbyul Choi is an internal medicine physician with a practice address in Rolling Hills Estates, California, and NPI 1164885174, issued on Mar 29, 2016. Check the license (California A158201, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Hanbyul Choi
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A158201 CA
Self-reported in NPPES; status is on the state search - Practice location
- 501 Deep Valley Dr Ste 100, Rolling Hills Estates, CA 90274
- Phone
- (310) 303-3953
- Enumerated
- Mar 29, 2016
- Entity
- Type 1 · individual
Also registered at 501 Deep Valley Dr Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Kimngan NguyenFamily Medicine Physician1902366552
- Daniel O'BrienCardiovascular Disease Physician1023512431
- Robert Reiss, MDInternal Medicine Physician1588746150
Verify Hanbyul Choi in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A158201Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
48% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,448 Medicare Part D claims for 306 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D. 22 claims were for opioids.
Most prescribed
- Atorvastatin Calcium107 claims
- Amlodipine Besylate73 claims
- Azithromycin71 claims
- Rosuvastatin Calcium70 claims
- Levothyroxine Sodium55 claims
- Losartan Potassium51 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.
The practice group's Medicare quality score for 2023: 86.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
One hospital or facility affiliation
- The Regents OF The University OF CaliforniaSanta Monica, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
9 internal medicine physician records list a Rolling Hills Estates practice address
They are 9 of the 208 NPPES records with a Rolling Hills Estates practice address, and 20,403 internal medicine physician records in California.
All 9 in Rolling Hills Estates → All 20,403 in California → Every provider in Rolling Hills Estates →
Other internal medicine physician records in California
- Jacob Aaron, MDSan Francisco, CA1407202518
- Alistair Aaronson, MDStanford, CA1457628760
- Jose Abad., MDSacramento, CA1144607219
- Donna Abare, MDOakland, CA1386722155
- Marce AbareScotts Valley, CA1457744708
- Samuel Abarte, M.D.Chula Vista, CA1578535498
- Alexander Abary, MDLong Beach, CA1104995919
- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is Hanbyul Choi's NPI number?
Hanbyul Choi's National Provider Identifier (NPI) is 1164885174, issued on Mar 29, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Hanbyul Choi located?
The NPPES record lists a practice address at 501 Deep Valley Dr Ste 100, Rolling Hills Estates, CA, 90274. Phone: (310) 303-3953. Providers update this record themselves, so call before visiting.
How can I verify Hanbyul Choi's license?
NPPES lists California license number A158201, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Hanbyul Choi prescribe under Medicare Part D?
In 2024, Hanbyul Choi had 1,448 Medicare Part D claims for 306 beneficiaries; the average among internal medicine physician prescribers was 2,785. Part D covers Medicare prescriptions only.
What is Hanbyul Choi's Medicare quality score?
The 2023 MIPS final score is 86.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.