Antibodies, Monoclonal, HumanizedAntineoplastic Combined Chemotherapy ProtocolsColorectal Neoplasms
Dr. Steven J. O'Day, MD
NPI1518070812
- Medicare services, 2020
- 392
- Part D claims, 2018
- 14
- Publications
- 46
- Clinical trials
- 10
- Hospital affiliations
- 1
- Practice address
- 2121 Santa Monica Blvd, Santa Monica, CA 90404
- Practice phone
- Call (310) 829-5511
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. O'Day's professional email, personal email and mobile number
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Dr. Steven J. O'Day is a hematologist and oncologist in Santa Monica, California
Dr. O'Day practices at Providence Saint John's Health Center in Santa Monica, California, part of Providence Health & Services.
Dr. O'Day's NPI, 1518070812, was assigned on August 17, 2006. Dr. O'Day holds California license A53519.
NPI and contact details
- NPI
- 1518070812NPI Registry (opens in a new tab)
- NPI enumeration date
- August 17, 2006
- NPI status
- Active
- Practice phone
- (310) 829-5511
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Steven J. O'Day practices at Providence Saint John's Health Center in Santa Monica, California
Dr. O'Day's primary practice is Providence Saint John's Health Center, at 2121 Santa Monica Blvd, Santa Monica, CA 90404 in Los Angeles County. The practice phone is (310) 829-5511.
- Providence Saint John's Health Center2121 Santa Monica Blvd, Santa Monica, CA 90404 · Los Angeles CountyPhone(310) 829-5511
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Steven J. O'Day is affiliated with 1 site of care and 1 medical group
Dr. O'Day's primary practice is Providence Saint John's Health Center in Santa Monica, California, part of Providence Health & Services. The medical group on file is Saint John's Physician Partners.
Sources: Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Steven J. O'Day's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. O'Day practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Providence Saint John's Health Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Steven J. O'Day is one of 1,502 hematologists and oncologists in California
Hematology and oncology is Dr. O'Day's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. O'Day is licensed in California.
Specialties and state licenses
- Hematology and oncology, CaliforniaPrimary
Hematologists and oncologists near Dr. O'Day
Counts of hematologists and oncologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Steven J. O'Day billed Medicare for 392 services in 2020
CMS data shows 392 Medicare services from Dr. O'Day across 3 procedure codes in 2020, all of them office visits. Medicare paid $29,763 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2020392
Paid by Medicare$29,763
Procedure codes3
Dr. O'Day's Medicare services by type, 2019 to 2020
- 2019
- 2020
- Office and hospital visits
- 2019: 4932020: 39220%
Dr. O'Day compared with the California median for hematologists and oncologists, 2020
- Dr. O'Day
- California median
- Medicare services
- 392vs 93258% below
- Part D claims
- 14vs 39496% below
Medians across 1,367 hematologists and oncologists in California with Dmand AI profiles that report each measure.
Dr. O'Day's most billed Medicare procedure codes, 2020
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Steven J. O'Day's patients have a median age of 79
Across all payers, Dmand AI patient panel data puts Dr. O'Day's median patient age at 79, with 50% women.
Dr. O'Day's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 79
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
Dr. Steven J. O'Day wrote 14 Medicare Part D claims in 2018
In 2018, Dr. O'Day wrote 14 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $102 in total drug cost. In 2017, CMS named 48 claims across 3 drugs.
Part D claims, 201814
Drugs named by CMS1
Total drug cost$102
Dr. O'Day's most prescribed drugs by claims, 2018
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2017 to 2018
- 2017
- 2018
- Claims for drugs CMS names
- 2017: 482018: 1471%
Drugs named by CMS: 1 in 2018, 3 in 2017.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Steven J. O'Day has 46 publications on record
Dmand AI links 46 papers to Dr. O'Day, published from 2009 to 2024. 2013 was the busiest year, with 9. The most frequent topics are Melanoma, Antibodies, Monoclonal, Humanized and Antibodies, Monoclonal. Dr. O'Day has published most often in Clin Cancer Res. Dr. O'Day's most frequent co-authors are Omid Hamid, MD, Frank Stephen Hodi, MD and Anna C. Pavlick, DO.
Papers46
Years published2009 to 2024
Dr. O'Day's papers by year, 2011 to 2024
Topics Dr. O'Day writes about most
- Melanoma
- Antibodies, Monoclonal, Humanized
- Antibodies, Monoclonal
- Skin Neoplasms
- Antineoplastic Combined Chemotherapy Protocols
- Ipilimumab
- Antineoplastic Agents
- CTLA-4 Antigen
Dr. O'Day's most frequent co-authors
- Omid Hamid, MD9 shared papers
- Frank Stephen Hodi, MD4 shared papers
- Anna C. Pavlick, DO4 shared papers
Recent publications by Dr. O'Day
Cancer Immunol Immunother
Antibodies, Monoclonal, HumanizedGoatsMelanoma
Int J Radiat Oncol Biol Phys
AzetidinesBrain NeoplasmsCarcinoma, Non-Small-Cell Lung
See who Dr. O'Day researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. O'Day works with, so you can find a warm path to the right hematologists and oncologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Steven J. O'Day has worked on 10 clinical trials
Dmand AI links Dr. O'Day to 10 clinical trials, 5 of them phase 2 studies. 2 are still active or recruiting. Conditions studied include Melanoma, Nevi and Melanomas and Colonic Neoplasms. Elios Therapeutics, LLC sponsors the most, 2.
Clinical trials with Dr. O'Day by phase
- 4Phase 1: 4 trials
- 1Phase 1/2: 1 trial
- 5Phase 2: 5 trials
- NonePhase 3: no trials
- NonePhase 4: no trials
Conditions in Dr. O'Day's trials
- Melanoma
- Nevi and Melanomas
- Colonic Neoplasms
- Fibrolamellar hepatocellular carcinoma
- Triple Negative Breast Neoplasms
Investigators on the most trials with Dr. O'Day
- Trevan Dale Fischer, MD6 shared trials
- Robert Martin Conry, MD2 shared trials
- Perry A. Soriano, MD2 shared trials
Recent clinical trials with Dr. O'Day
Phase 2 Trial of Voyager V1 in Combination With Cemiplimab in Patients With Select Solid Tumors (opens in a new tab)
RecruitingPhase 2
Colonic NeoplasmsSquamous Cell Carcinoma of Head and NeckCemiplimabVV1
MelanomaNevi and MelanomasTLPLDC Vaccine
Urinary Bladder NeoplasmsUrinary Bladder DiseasesCVA21/pembrolizumab
UV1 Vaccination Plus Nivolumab and Ipilimumab in Treatment of Melanoma (opens in a new tab)
CompletedPhase 2
MelanomaNevi and MelanomasIpilimumabNivolumabUV1
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Steven J. O'Day received $702,567 in industry payments from 2016 to 2022
CMS Open Payments shows 612 general payments to Dr. O'Day from 18 drug and device companies from 2016 to 2022. Speaker and faculty fees make up the largest share, 64% of the total. Bristol-Myers Squibb Company paid the most, $572,069.
General payments to Dr. O'Day by program year, 2016 to 2022
General payments to Dr. O'Day by kind, 2016 to 2022
$702.6Kin total
- Speaker and faculty fees$448,62364%
- Travel and lodging$129,44318%
- Consulting fees$112,04516%
- Food and beverage$9,9361%
- Other$2,5210%
Companies that paid Dr. O'Day the most, 2016 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Steven J. O'Day's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Steven J. O'Day
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Steven J. O'Day's NPI number?
Dr. Steven J. O'Day's NPI number is 1518070812. It was assigned on August 17, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Steven J. O'Day?
Dr. Steven J. O'Day is a hematologist and oncologist in Santa Monica, California. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Where does Dr. Steven J. O'Day practice?
Dr. O'Day practices at 2121 Santa Monica Blvd, Santa Monica, CA 90404. Dr. O'Day's primary practice is Providence Saint John's Health Center in Santa Monica, California, part of Providence Health & Services.
What is Dr. Steven J. O'Day's office phone number?
The practice phone on file for Dr. O'Day is (310) 829-5511.
What is Dr. Steven J. O'Day's medical license number?
Dr. O'Day holds California license A53519.
Which hospitals is Dr. Steven J. O'Day affiliated with?
Dr. O'Day practices at Providence Saint John's Health Center in Santa Monica, California.
What medical group is Dr. Steven J. O'Day part of?
Dr. O'Day is linked to Saint John's Physician Partners.
Does Dr. Steven J. O'Day accept Medicare?
Yes. CMS data shows Dr. O'Day billed Medicare for 392 services in 2020.
What services does Dr. Steven J. O'Day bill to Medicare?
In 2020, Dr. O'Day's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99215) and office visit, new patient (99205).
What drugs does Dr. Steven J. O'Day prescribe most?
In 2018 Medicare Part D data, Dr. O'Day's most prescribed drugs by claims were Prednisone.
Show 4 more questionsShow fewer questions
Has Dr. Steven J. O'Day received payments from drug or device companies?
CMS Open Payments shows $702,567 in general payments to Dr. O'Day from 18 companies from 2016 to 2022. The largest total came from Bristol-Myers Squibb Company.
How long has Dr. Steven J. O'Day been practicing?
Dr. O'Day's NPI was assigned in 2006.
Does Dr. Steven J. O'Day do research?
Dmand AI links 46 publications to Dr. O'Day, published from 2009 to 2024. Dr. O'Day has worked on 10 clinical trials.
Who does Dr. Steven J. O'Day publish with?
Dr. O'Day's most frequent co-authors are Omid Hamid, MD (9 shared papers), Frank Stephen Hodi, MD (4 shared papers) and Anna C. Pavlick, DO (4 shared papers).
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