Arthur Shen, D.O.
Internal Medicine Physician · Los Angeles, CA
Arthur Shen, D.O. is an internal medicine physician with a practice address in Los Angeles, California, and NPI 1497045389, issued on Apr 12, 2011. Check the license (California 20A11314, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Arthur Shen
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A11314 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1200 N State St, Los Angeles, CA 90089
- Phone
- (323) 226-7556
- Enumerated
- Apr 12, 2011
- Record last updated
- Dec 6, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20111230000187); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 1200 N State St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Arthur Shen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A11314Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average internal medicine physician in 2024
284 Medicare Part D claims for 131 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Furosemide19 claims
- Amlodipine Besylate17 claims
- Eliquis16 claims
- Ciprofloxacin Hcl15 claims
- Rosuvastatin Calcium13 claims
- Cefpodoxime Proxetil11 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 GroupHarbor City, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Arthur Shen among 17,696 internal medicine physician records in California
Arthur Shen, 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 2011, is newer than 66% of them.
- NPI issued2011 · 66% of these records are older, 32% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2008 · median 2004 among the 11,065 with a school on file
- Record last updated2021 · 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
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- Sarita Mohanty, MDLos Angeles, CA 900891730286683
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- Hoa Phan, D.O.Los Angeles, CA 900891295919686
- Jesse Sammons, MDLos Angeles, CA 900891871753707
Common questions
What is Arthur Shen, D.O.'s NPI number?
Arthur Shen, D.O.'s National Provider Identifier (NPI) is 1497045389, issued on Apr 12, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Arthur Shen, D.O. located?
The NPPES record lists a practice address at 1200 N State St, Los Angeles, CA, 90089. Phone: (323) 226-7556. Providers update this record themselves, so call before visiting.
How can I verify Arthur Shen, D.O.'s license?
NPPES lists California license number 20A11314, 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 Arthur Shen, D.O. prescribe under Medicare Part D?
In 2024, Arthur Shen, D.O. had 284 Medicare Part D claims for 131 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.