Brian Oliver Warnecke, D.O.
Hematology & Oncology Physician · Orange, CA
Brian Oliver Warnecke, D.O. is a hematology & oncology physician with a practice address in Orange, California, and NPI 1356804421, issued on Apr 7, 2019. Check the license (California 20A20086, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Brian Oliver Warnecke
- Credential
- D.O.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 20A20086 CA
Self-reported in NPPES; status is on the state search - Practice location
- 200 S Manchester Ave Ste 400, Orange, CA 92868
- Phone
- (714) 456-7772
- Enumerated
- Apr 7, 2019
- Record last updated
- Sep 4, 2025
- Medicare enrollment
- Enrolled (PECOS I20250822001994); accepts Medicare assignment
- Medical or professional school
- Kansas City University Of Med & Biosciences, College Of Osteo Med, 2019
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →
Also registered at 200 S Manchester Ave Ste 400
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nicole Foley, M.D.Hematology & Oncology Physician1003301110
- Edward Kuan, MDOtolaryngic Allergy Physician1295091155
Verify Brian Oliver Warnecke in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A20086Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $322.96
9 payments; by number, the most common kind was food and beverage; the largest payer was E.R. Squibb & Sons, L.L.C. The 8,560 providers of this specialty with any payment received $7,481.41 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
- UC RegentsOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Brian Oliver Warnecke among 1,583 hematology & oncology physician records in California
Brian Oliver Warnecke, D.O. is one of 1,583 hematology & oncology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 95% of them.
- NPI issued2019 · 95% of these records are older, 3% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2019 · median 2003 among the 1,124 with a school on file
- Record last updated2025 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in California
There are 1,583 hematology & oncology physician records in California.
All 1,583 in California → Every provider in Orange → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Timothy Byun, MDOrange, CA 928681871545012
- Warren Chow, MDOrange, CA 928681093822017
- Paul Coluzzi, M.D.Orange, CA 928681972563906
- Mihaela Cristea, MDOrange, CA 928681417050998
- Sam Huang, M.D.Orange, CA 928681841248812
- Tiberio Lindgren, MDOrange, CA 928681275585424
- John Link, MDOrange, CA 928681245281211
- Steven Lipkin, MDOrange, CA 928681134153547
Common questions
What is Brian Oliver Warnecke, D.O.'s NPI number?
Brian Oliver Warnecke, D.O.'s National Provider Identifier (NPI) is 1356804421, issued on Apr 7, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Brian Oliver Warnecke, D.O. located?
The NPPES record lists a practice address at 200 S Manchester Ave Ste 400, Orange, CA, 92868. Phone: (714) 456-7772. Providers update this record themselves, so call before visiting.
How can I verify Brian Oliver Warnecke, D.O.'s license?
NPPES lists California license number 20A20086, 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.
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.