Shoon Lei Oo, MD
Internal Medicine Physician · Little Rock, AR
Shoon Lei Oo, MD is an internal medicine physician with a practice address in Little Rock, Arkansas, and NPI 1164165627, issued on Apr 13, 2022. Check the license (Arkansas E-19644, as entered in NPPES) on the Arkansas State Medical Board; the Medicare figures below come from public CMS files.
- Name
- Shoon Lei Oo
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- E-19644 AR
Self-reported in NPPES; status is on the state search - Practice location
- 4301 W Markham St # 508, Little Rock, AR 72205
- Phone
- (501) 686-8000
- Enumerated
- Apr 13, 2022
- Record last updated
- Jul 29, 2025
- Fax
- (501) 526-5148
- Medicare enrollment
- Enrolled (PECOS I20250811002567); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 768 in Arkansas → Look up another NPI →
Also registered at 4301 W Markham St # 508
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Shoon Lei Oo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArkansas State Medical Board
Search for license E-19644Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average internal medicine physician in 2024
215 Medicare Part D claims for 56 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium14 claims
- Amlodipine Besylate13 claims
- Losartan Potassium11 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
- University OF Arkansas For Medical SciencesLittle Rock, AR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Shoon Lei Oo among 768 internal medicine physician records in Arkansas
Shoon Lei Oo, MD is one of 768 internal medicine physician records with a practice address in Arkansas. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 91% of them.
- NPI issued2022 · 91% of these records are older, 4% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2018 · median 2010 among the 519 with a school on file
- Record last updated2025 · 50% 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 Arkansas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
219 internal medicine physician records list a practice address in Little Rock
They are 219 of the 13,172 NPPES records with a practice address in Little Rock, and 768 internal medicine physician records in Arkansas.
All 768 in Arkansas → Every provider in Little Rock → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Brian Bean, M.D.Little Rock, AR 722051003870049
- Eric Delgiacco, M.D.Little Rock, AR 722051285695973
- Raymond Edwards, M.D.Little Rock, AR 722051851371314
- Irol Gray, MDLittle Rock, AR 722051164429981
- Richard Johns, MDLittle Rock, AR 722051144214578
- Rana Kayali, M.D.Little Rock, AR 722051720041577
- Lubna Maruf, M.D.Little Rock, AR 722051336119536
- Solomon Mogbo, M.DLittle Rock, AR 722051083615348
Common questions
What is Shoon Lei Oo, MD's NPI number?
Shoon Lei Oo, MD's National Provider Identifier (NPI) is 1164165627, issued on Apr 13, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Shoon Lei Oo, MD located?
The NPPES record lists a practice address at 4301 W Markham St # 508, Little Rock, AR, 72205. Phone: (501) 686-8000. Providers update this record themselves, so call before visiting.
How can I verify Shoon Lei Oo, MD's license?
NPPES lists Arkansas license number E-19644, as entered by the provider. Search the Arkansas State Medical Board at https://armedicalboard.adh.arkansas.gov/public/verify/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Shoon Lei Oo, MD prescribe under Medicare Part D?
In 2024, Shoon Lei Oo, MD had 215 Medicare Part D claims for 56 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.