Caitlin O'Neill
Hematology (Internal Medicine) Physician · Los Angeles, CA
Caitlin O'Neill is a hematology (internal medicine) physician with a practice address in Los Angeles, California, and NPI 1497174262, issued on Apr 9, 2014. Check the license (California A141109, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Caitlin O'Neill
- Primary taxonomy
- Hematology (Internal Medicine) Physician 207RH0000X
- License number
- A141109 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1441 Eastlake Ave # Nor3470, Los Angeles, CA 90089
- Phone
- (323) 865-3105
- Enumerated
- Apr 9, 2014
- Record last updated
- Nov 27, 2023
- Medicaid ID
- CO3232267556 CA
- Medicare enrollment
- Enrolled (PECOS I20200723000756); accepts Medicare assignment
- Medical or professional school
- University Of Southern California Keck School Of Medicine, 2014
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 1441 Eastlake Ave # Nor3470
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kimberly Ho, PA-CPhysician Assistant1053801670
Verify Caitlin O'Neill in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A141109Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
74% fewer Medicare Part D claims than the average hematology (internal medicine) physician in 2024
127 Medicare Part D claims for 41 beneficiaries, against an average of 496 among the 1,036 providers of this specialty who prescribed in Part D. Brand-name drugs were 68% of claims.
Most prescribed
- Eliquis24 claims
- Doptelet20 claims
- Xarelto14 claims
- Calquence12 claims
- Warfarin Sodium12 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.
Industry payments in 2024: $259.53
5 payments; by number, the most common kind was food and beverage; the largest payer was PharmaEssentia USA Corporation. The 721 providers of this specialty with any payment received $13,778.35 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Usc Care Medical Group IncLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Hematology (Internal Medicine) Physician providers in California
There are 175 hematology (internal medicine) physician records in California.
Other hematology (internal medicine) physician records in California
- John Adamson, MDSan Diego, CA1477504801
- Mhd Monzr Al Malki, M.D.Duarte, CA1043489362
- Ibrahim Aldoss, M.D.Duarte, CA1861692485
- Haris Ali, M.D.Duarte, CA1467672907
- Julio Alvarenga Thiebaud, M.D.Irvine, CA1457770497
- Joseph Alvarnas, M.D.Duarte, CA1558321745
- Idoroenyi Amanam, M.D.Duarte, CA1205257920
- Sally Arai, MDStanford, CA1881739530
- Ahmed Aribi, MDDuarte, CA1912024910
- Andrew Artz, M.D., M.S.Duarte, CA1306859772
Common questions
What is Caitlin O'Neill's NPI number?
Caitlin O'Neill's National Provider Identifier (NPI) is 1497174262, issued on Apr 9, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Caitlin O'Neill located?
The NPPES record lists a practice address at 1441 Eastlake Ave # Nor3470, Los Angeles, CA, 90089. Phone: (323) 865-3105. Providers update this record themselves, so call before visiting.
How can I verify Caitlin O'Neill's license?
NPPES lists California license number A141109, 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 Caitlin O'Neill prescribe under Medicare Part D?
In 2024, Caitlin O'Neill had 127 Medicare Part D claims for 41 beneficiaries; the average among hematology (internal medicine) physician prescribers was 496. 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.