Esther Ahn
Internal Medicine Physician · Culver City, CA
Esther Ahn is an internal medicine physician with a practice address in Culver City, California, and NPI 1023375847, issued on Apr 18, 2012. Check the license (California 128139, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Esther Ahn
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 128139 CA
Self-reported in NPPES; status is on the state search - Practice location
- 10100 Culver Blvd Ste A, Culver City, CA 90232
- Phone
- (310) 423-5555
- Enumerated
- Apr 18, 2012
- Record last updated
- Nov 28, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150911001368); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 10100 Culver Blvd Ste A
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Camille RainerInternal Medicine Physician1629657168
- Nabeeha Siddiqui, MDFamily Medicine Physician1508421256
- Ethan Youssefzadeh, DOFamily Medicine Physician1144951260
Verify Esther Ahn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 128139Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
43% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,811 Medicare Part D claims for 220 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 68 claims were for opioids.
Most prescribed
- Atorvastatin Calcium247 claims
- Amlodipine Besylate133 claims
- Losartan Potassium100 claims
- Levothyroxine Sodium76 claims
- Simvastatin63 claims
- Lisinopril56 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
- Cedars-Sinai Medical Care FoundationBeverly Hills, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Esther Ahn among 17,696 internal medicine physician records in California
Esther Ahn is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 68% of them.
- NPI issued2012 · 68% of these records are older, 29% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2012 · median 2004 among the 11,065 with a school on file
- Record last updated2018 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Internal Medicine Physician providers in California
There are 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Culver City → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Pedram Kohan, M.D.Culver City, CA 902321710392840
- Katie Marks, M.D.Culver City, CA 902321154596047
- Mary Norman, M.D.Culver City, CA 902321811002454
- Leslie Paul, M.D.Culver City, CA 902321366509499
- Chandana Potaraju, MDCulver City, CA 902321326501909
- Camille RainerCulver City, CA 902321629657168
- Ashkan Sefaradi, M.D.Culver City, CA 902321861802548
- Steven Witlin, M.D.Culver City, CA 902321841340452
Common questions
What is Esther Ahn's NPI number?
Esther Ahn's National Provider Identifier (NPI) is 1023375847, issued on Apr 18, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Esther Ahn located?
The NPPES record lists a practice address at 10100 Culver Blvd Ste A, Culver City, CA, 90232. Phone: (310) 423-5555. Providers update this record themselves, so call before visiting.
How can I verify Esther Ahn's license?
NPPES lists California license number 128139, 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 Esther Ahn prescribe under Medicare Part D?
In 2024, Esther Ahn had 1,811 Medicare Part D claims for 220 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.