Theingi Oo, MD
Internal Medicine Physician · Los Angeles, CA
Theingi Oo, MD is an internal medicine physician with a practice address in Los Angeles, California, and NPI 1366637407, issued on Sep 12, 2007. Check the license (California A104545, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Theingi Oo
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A104545 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1300 N Vermont Ave, Los Angeles, CA 90027
- Phone
- (323) 662-0492
- Enumerated
- Sep 12, 2007
- Record last updated
- Jul 26, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (323) 662-0196
- Medicare enrollment
- Enrolled (PECOS I20091216000311); 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 1300 N Vermont Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Theingi Oo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A104545Check 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
221 Medicare Part D claims for 77 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Ertapenem35 claims
- Meropenem27 claims
- Ceftriaxone22 claims
- Levofloxacin20 claims
- Linezolid19 claims
- Metronidazole18 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.
Theingi Oo among 17,696 internal medicine physician records in California
Theingi Oo, 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 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
- Graduated1999 · median 2004 among the 11,065 with a school on file
- Record last updated2016 · 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 →
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Common questions
What is Theingi Oo, MD's NPI number?
Theingi Oo, MD's National Provider Identifier (NPI) is 1366637407, issued on Sep 12, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Theingi Oo, MD located?
The NPPES record lists a practice address at 1300 N Vermont Ave, Los Angeles, CA, 90027. Phone: (323) 662-0492. Providers update this record themselves, so call before visiting.
How can I verify Theingi Oo, MD's license?
NPPES lists California license number A104545, 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 Theingi Oo, MD prescribe under Medicare Part D?
In 2024, Theingi Oo, MD had 221 Medicare Part D claims for 77 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.