Woojin Joo, MD
Internal Medicine Physician · Los Angeles, CA
Woojin Joo, MD is an internal medicine physician with a practice address in Los Angeles, California, and NPI 1780110338, issued on May 2, 2017. Check the license (California A160312, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Woojin Joo
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A160312 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3511 W Olympic Blvd Ste 202, Los Angeles, CA 90019
- Phone
- (310) 294-8090
- Enumerated
- May 2, 2017
- Record last updated
- Sep 9, 2025
- Fax
- (310) 294-5343
- Medicare enrollment
- Enrolled (PECOS I20210126002884); accepts Medicare assignment
- Medical or professional school
- St. Louis College Of Physicians And Surgeons, 2017
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 3511 W Olympic Blvd Ste 202
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kyung Kang, D.CChiropractor1487835880
Verify Woojin Joo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A160312Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.4 times the Medicare Part D claims of the average internal medicine physician in 2024
7,593 Medicare Part D claims for 725 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims. 43 claims were for opioids.
Most prescribed
- Atorvastatin Calcium574 claims
- Amlodipine Besylate464 claims
- Vascepa317 claims
- Losartan Potassium304 claims
- Metformin Hcl245 claims
- Tamsulosin Hcl227 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.
Industry payments in 2024: $636.43
26 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Woojin Joo among 17,696 internal medicine physician records in California
Woojin Joo, MD 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 2017, is newer than 81% of them.
- NPI issued2017 · 81% of these records are older, 16% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2017 · median 2004 among the 11,065 with a school on file
- Record last updated2025 · 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).
1,423 internal medicine physician records list a practice address in Los Angeles
They are 1,423 of the 69,537 NPPES records with a practice address in Los Angeles, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Los Angeles → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Yung Chun, M.D.Los Angeles, CA 900191467557512
- James Jung, MDLos Angeles, CA 900191912920919
- Bahman Lalezari, MDLos Angeles, CA 900191891802013
- Robert Lifson, M.D.Los Angeles, CA 900191922194752
- Dong Mun, MDLos Angeles, CA 900191053346940
- Min Cha, M.D.Los Angeles, CA 900201700972403
- Earl Cooper, M.D.Los Angeles, CA 900181780906404
- Yongchul Huh, MDLos Angeles, CA 900201184799603
Common questions
What is Woojin Joo, MD's NPI number?
Woojin Joo, MD's National Provider Identifier (NPI) is 1780110338, issued on May 2, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Woojin Joo, MD located?
The NPPES record lists a practice address at 3511 W Olympic Blvd Ste 202, Los Angeles, CA, 90019. Phone: (310) 294-8090. Providers update this record themselves, so call before visiting.
How can I verify Woojin Joo, MD's license?
NPPES lists California license number A160312, 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 Woojin Joo, MD prescribe under Medicare Part D?
In 2024, Woojin Joo, MD had 7,593 Medicare Part D claims for 725 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.