Colton John Ladbury, MD
Radiation Oncology Physician · Irvine, CA
Colton John Ladbury, MD is a radiation oncology physician with a practice address in Irvine, California, and NPI 1891256756, issued on Mar 25, 2019. Check the license (California A178093, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Colton John Ladbury
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- A178093 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1000 Fivepoint, Irvine, CA 92618
- Phone
- (949) 671-4673
- Enumerated
- Mar 25, 2019
- Record last updated
- Jun 12, 2026
- Medicare enrollment
- Enrolled (PECOS I20240320001975); accepts Medicare assignment
- Medical or professional school
- University Of Colorado School Of Medicine, Aurora, 2019
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 735 in California → Look up another NPI →
Also registered at 1000 Fivepoint
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mary Alessi, PA-CPhysician Assistant1962711838
- Tara Anderson, PA-CPhysician Assistant1770058349
- Aubree Ashdown, PA-CPhysician Assistant1679244503
- Ghazal Bahri, M.D.Hospitalist Physician1770013146
- Meg Camille Baldonado, FNP-CFamily Nurse Practitioner1346602604
- Joseph Barrera, FNPFamily Nurse Practitioner1306289491
Verify Colton John Ladbury in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A178093Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
14% fewer Medicare Part D claims than the average radiation oncology physician in 2024
115 Medicare Part D claims for 47 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. 20 claims were for opioids.
Most prescribed
- Lorazepam18 claims
- Hydrocodone-Acetaminophen16 claims
- Ondansetron Odt15 claims
- Cephalexin14 claims
- Tamsulosin Hcl13 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: $116.50
4 payments; by number, the most common kind was food and beverage; the largest payer was Siemens Medical Solutions USA, Inc. The 3,275 providers of this specialty with any payment received $1,897.85 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
- City OF Hope Medical FoundationDuarte, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Colton John Ladbury among 735 radiation oncology physician records in California
Colton John Ladbury, MD is one of 735 radiation 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 92% of them.
- NPI issued2019 · 92% of these records are older, 5% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2019 · median 2005 among the 545 with a school on file
- Record last updated2026 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in California
There are 735 radiation oncology physician records in California.
All 735 in California → Every provider in Irvine → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Percy Lee, M.D.Irvine, CA 926181447442504
- Harry Moyses, M.D.Irvine, CA 926181376522300
- Selamawit Negusse, MDIrvine, CA 926181316144041
- Amanda Schwer, MDIrvine, CA 926181780721043
- Kenneth Tokita, M.D.Irvine, CA 926181447432653
- Julius Weng, M.D.Irvine, CA 926181174084610
- John Loh, M.D.Laguna Woods, CA 926371114197472
- Parima Daroui, M.D. PH.D.Wildomar, CA 925951629283841
Common questions
What is Colton John Ladbury, MD's NPI number?
Colton John Ladbury, MD's National Provider Identifier (NPI) is 1891256756, issued on Mar 25, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Colton John Ladbury, MD located?
The NPPES record lists a practice address at 1000 Fivepoint, Irvine, CA, 92618. Phone: (949) 671-4673. Providers update this record themselves, so call before visiting.
How can I verify Colton John Ladbury, MD's license?
NPPES lists California license number A178093, 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 Colton John Ladbury, MD prescribe under Medicare Part D?
In 2024, Colton John Ladbury, MD had 115 Medicare Part D claims for 47 beneficiaries; the average among radiation oncology physician prescribers was 134. 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.