Doctor profile · Federal record

Dr. Ryan O'Connor, M.D.

Emergency Medicine Physician (CMS: Emergency Medicine) · Los Angeles, CA

  • NPI 1821101635
  • Accepts Medicare
  • 24 yrs in practice
  • Male
  • Solo practice
  • No sanctions

Practice & contact

NPPES Updated May 11, 2026
Primary practice
1442 Kellam Ave
Los Angeles, CA 900265138
(310) 990-9979
Mailing address
190 Portola RD
Portola Valley, CA 940287852

Credentials & registration

NPPES · NUCC
NPI registered
August 2006 — 20 yrs on file
Profile last updated
September 26, 2011
Year of graduation
2002 — 24 yrs since
Specialty taxonomy
207P00000X — NUCC code
State license (1)
California #A95130
Medicaid
CA #00A951300

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1821101635. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
39
Distinct HCPCS
2
Medicare allowed
$6,259
HCPCS Description Services Patients Avg allowed
99285 Emergency department visit with high level of medical decision making 24 24 $182
99284 Emergency department visit with moderate level of medical decision making 15 15 $126

In context: peer comparison

Among 185 peers in Los Angeles Emergency Medicine Physician, average services per provider: 87. This provider delivers 0.4× the peer median.

Hospital affiliations

CMS Hospital Compare

Frequently asked questions

Auto-generated from federal data
What is Dr. Ryan O'Connor's medical specialty?
Dr. Ryan O'Connor practices Emergency Medicine Physician in Los Angeles, CA.
Where does Dr. Ryan O'Connor practice?
Dr. Ryan O'Connor practices at 1442 Kellam Ave, Los Angeles, CA 900265138. Office phone: 3109909979.
What is Dr. Ryan O'Connor's NPI?
Dr. Ryan O'Connor's National Provider Identifier (NPI) is 1821101635, issued by NPPES.
Does Dr. Ryan O'Connor accept Medicare assignment?
Yes. Dr. Ryan O'Connor accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Ryan O'Connor commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with high level of medical decision making (HCPCS 99285); Emergency department visit with moderate level of medical decision making (HCPCS 99284). Source: CMS Medicare Physician & Other Practitioners file.