Ryan S. O'Connor, M.D.
Emergency Medicine Physician · Los Angeles, CA
Ryan S. O'Connor, M.D. is an emergency medicine physician with a practice address in Los Angeles, California, and NPI 1821101635, issued on Aug 16, 2006. Check the license (California A95130, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ryan S. O'Connor
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A95130 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1442 Kellam Ave, Los Angeles, CA 90026
- Phone
- (310) 990-9979
- Enumerated
- Aug 16, 2006
- Record last updated
- Sep 26, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicaid ID
- 00A951300 CA
- Medicare enrollment
- Enrolled (PECOS I20061025000801); accepts Medicare assignment
- Medical or professional school
- New York Medical College, 2002
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Verify Ryan S. O'Connor in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A95130Check 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 emergency medicine physician in 2024
16 Medicare Part D claims, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
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
- Hollywood Presbyterian Emergency Medical Associates, Inc.Los Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ryan S. O'Connor among 7,751 emergency medicine physician records in California
Ryan S. O'Connor, M.D. is one of 7,751 emergency medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 60% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2002 · median 2011 among the 4,560 with a school on file
- Record last updated2011 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Los Angeles → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- John Barnard, MDLos Angeles, CA 900261356616197
- Abraham Flinders, M.D.Los Angeles, CA 900261043685969
- Andrea Munro, M.D.Los Angeles, CA 900261710248463
- Benjamin Musser, M.D.Los Angeles, CA 900261164892501
- Mehran Baheri, M.D.Los Angeles, CA 900251801944277
- Vincent Bennett, MDLos Angeles, CA 900271982650776
- Emile Chang, M.D.Los Angeles, CA 900251437392909
- Estak Choudhury, MDLos Angeles, CA 900271790729846
Common questions
What is Ryan S. O'Connor, M.D.'s NPI number?
Ryan S. O'Connor, M.D.'s National Provider Identifier (NPI) is 1821101635, issued on Aug 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ryan S. O'Connor, M.D. located?
The NPPES record lists a practice address at 1442 Kellam Ave, Los Angeles, CA, 90026. Phone: (310) 990-9979. Providers update this record themselves, so call before visiting.
How can I verify Ryan S. O'Connor, M.D.'s license?
NPPES lists California license number A95130, 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 Ryan S. O'Connor, M.D. prescribe under Medicare Part D?
In 2024, Ryan S. O'Connor, M.D. had 16 Medicare Part D claims; the average among emergency medicine physician prescribers was 226. 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.