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RYAN S O'CONNOR M.D.
NPI 1821101635
Emergency Medicine in Los Angeles, CA

Active since August 16, 2006PECOS EnrolledAccepts Medicare Assignment
1442 KELLAM AVE, LOS ANGELES, CA 90026(310) 990-9979 Get Directions Write a Review

NPPES record last updated: September 26, 2011. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Ryan S O'connor M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

RYAN S O'CONNOR M.D. (NPI 1821101635) is an individual emergency medicine provider in Los Angeles, California, licensed in California (A95130) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and is a graduate of New York Medical College (2002).

NPPES Registry Identity

NPI1821101635
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameRYAN S O'CONNORCredential: M.D.
Location Address1442 KELLAM AVELos Angeles, CA 90026-5138
Mailing Address190 Portola RdPortola Valley, CA 94028-7852 · (310) 990-9979 · Fax (650) 851-4675
Phone(310) 990-9979
Sole ProprietorYes
Medical School CMSNew York Medical CollegeGraduated 2002
Enumeration DateAugust 16, 2006
Last NPPES UpdateSeptember 26, 2011
✔ NPI 1821101635 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in CA · A95130
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
1442 KELLAM AVE, Los Angeles, CA 90026
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Other Identifiers 2

Medicare PINWA95130CCA
Medicaid00A951300CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Ryan S O'connor M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1850311341
PECOS Enrollment IDI20061025000801
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

4

Medicare enrollment records show Ryan O'connor reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Hollywood Presbyterian Emergency Medical Associates, Inc.
2.7 mi
Emergency Medicine
1300 N VERMONT AVE
Los Angeles, CA 90027
  • Reassigned Medicare billing, California enrollment
  • 74 clinicians in this Medicare group
NPI 1972826931 (310) 321-0143
Can Emergency Physicians Medical Group, Inc.
15 mi
Emergency Medicine
14850 ROSCOE BLVD
Panorama City, CA 91402
  • Reassigned Medicare billing, California enrollment
  • 121 clinicians in this Medicare group
NPI 1265810006 (408) 559-2011
California Hospitalists Emergency Physicians Medical Group Inc
16 mi
Emergency Medicine
13222 BLOOMFIELD AVE
Norwalk, CA 90650
  • Reassigned Medicare billing, California enrollment
  • 55 clinicians in this Medicare group
NPI 1760648539 (747) 283-1809
San Joaquin Emergency Medical Associates
257 mi
Emergency Medicine
333 MERCY AVE
Merced, CA 95340
  • Reassigned Medicare billing, California enrollment
  • 141 clinicians in this Medicare group
NPI 1588960413 (844) 474-4019

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
24 services24 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
15 services15 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90026 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$96.36 typical visit price
range $62.96 – $187.60
Typical copayment $24.09 (range $15.74 – $46.90)
Most-billed visit code 99203
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Ryan O'connor's NPI number?

The NPI number for Ryan O'connor is 1821101635. It was assigned to this individual provider in the NPPES registry on August 16, 2006.

Where is Ryan O'connor located?

Ryan O'connor practices at 1442 Kellam Ave, Los Angeles, CA 90026. The listed phone number is (310) 990-9979.

What is Ryan O'connor's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Ryan O'connor enrolled in Medicare?

Yes. Ryan O'connor is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Ryan O'connor's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ryan O'connor reassigns Medicare benefits to 4 organizations: Hollywood Presbyterian Emergency Medical Associates, Inc. (Los Angeles, CA), Can Emergency Physicians Medical Group, Inc. (Panorama City, CA), California Hospitalists Emergency Physicians Medical Group Inc (Norwalk, CA) and San Joaquin Emergency Medical Associates (Merced, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Ryan O'connor's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Ryan O'connor was last updated on September 26, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.