Karen Eunkyung Oh, D.O.
Internal Medicine Physician · Torrance, CA
Karen Eunkyung Oh, D.O. is an internal medicine physician with a practice address in Torrance, California, and NPI 1902006588, issued on Jul 20, 2007. Check the license (California 20A5905, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Karen Eunkyung Oh
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A5905 CA
Self-reported in NPPES; status is on the state search - Practice location
- 23000 Crenshaw Blvd., Torrance, CA 90505
- Phone
- (310) 326-1147
- Enumerated
- Jul 20, 2007
- Record last updated
- Jan 18, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (310) 326-1148
- Medicare enrollment
- Enrolled (PECOS I20090706000353); accepts Medicare assignment
- Medical or professional school
- Des Moines University Of Osteopathic Medicine And Health Sciences, 1988
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Karen Eunkyung Oh in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A5905Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
44% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,773 Medicare Part D claims for 115 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 32 claims were for opioids.
Most prescribed
- Amlodipine Besylate136 claims
- Rosuvastatin Calcium135 claims
- Losartan Potassium100 claims
- Metformin Hcl Er95 claims
- Alendronate Sodium88 claims
- Levothyroxine Sodium76 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.
Karen Eunkyung Oh among 17,696 internal medicine physician records in California
Karen Eunkyung Oh, D.O. 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 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 44% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1988 · median 2004 among the 11,065 with a school on file
- Record last updated2011 · 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).
231 internal medicine physician records list a practice address in Torrance
They are 231 of the 8,901 NPPES records with a practice address in Torrance, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Torrance → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Tanya Arvan, MDTorrance, CA 905051104827666
- Madhu Chatwani, M.D.Torrance, CA 905051215993894
- James Ding, MDTorrance, CA 905051285614636
- Vadim Fanous, MDTorrance, CA 905051457329716
- Tyler Jung, M.D.Torrance, CA 905051194791772
- Chong Kim, MDTorrance, CA 905051528034485
- Janet Lee, D.O.Torrance, CA 905051205826633
- Thomas Lee, M.D.Torrance, CA 905051609842079
Common questions
What is Karen Eunkyung Oh, D.O.'s NPI number?
Karen Eunkyung Oh, D.O.'s National Provider Identifier (NPI) is 1902006588, issued on Jul 20, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Karen Eunkyung Oh, D.O. located?
The NPPES record lists a practice address at 23000 Crenshaw Blvd., Torrance, CA, 90505. Phone: (310) 326-1147. Providers update this record themselves, so call before visiting.
How can I verify Karen Eunkyung Oh, D.O.'s license?
NPPES lists California license number 20A5905, 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 Karen Eunkyung Oh, D.O. prescribe under Medicare Part D?
In 2024, Karen Eunkyung Oh, D.O. had 1,773 Medicare Part D claims for 115 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.