Ian Churchill Anderson, M.D.
Hematology & Oncology Physician · Santa Rosa, CA
Ian Churchill Anderson, M.D. is a hematology & oncology physician with a practice address in Santa Rosa, California, and NPI 1518055573, issued on Oct 11, 2006. Check the license (California A49481, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ian Churchill Anderson
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- A49481 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3555 Round Barn Cir, Santa Rosa, CA 95403
- Phone
- (707) 528-1050
- Enumerated
- Oct 11, 2006
- Record last updated
- Oct 14, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 00A494810 CA
- Medicare enrollment
- Enrolled (PECOS I20040226000628); accepts Medicare assignment
- Medical or professional school
- Duke University School Of Medicine, 1988
- 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 3555 Round Barn Cir
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Leena Agrawal, PHARMDOncology Pharmacist1174221634
- Lorraine Champion, MDSpecialist1932190949
- Parnian EslamiPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1477200111
- Justin Grenet, MDHematology & Oncology Physician1770102915
- Ralph Hanahan, M.D.Therapeutic Radiology Physician1801986641
- Jarrod Holmes, MDHematology & Oncology Physician1013018035
Verify Ian Churchill Anderson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A49481Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.3 times the Medicare Part D claims of the average hematology & oncology physician in 2024
2,030 Medicare Part D claims for 366 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. 152 claims were for opioids.
Most prescribed
- Letrozole167 claims
- Dexamethasone91 claims
- Prochlorperazine Maleate90 claims
- Potassium Chloride87 claims
- Tamoxifen Citrate87 claims
- Prednisone74 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: $604.16
22 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. 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
- Providence Medical FoundationPetaluma, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ian Churchill Anderson among 1,583 hematology & oncology physician records in California
Ian Churchill Anderson, M.D. 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 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 54% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1988 · median 2003 among the 1,124 with a school on file
- Record last updated2021 · 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 Santa Rosa → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Nicolaj Andersen, MDSanta Rosa, CA 954031659455640
- Peter Brett, M.D.Santa Rosa, CA 954031487743472
- Justin Grenet, MDSanta Rosa, CA 954031770102915
- Jarrod Holmes, MDSanta Rosa, CA 954031013018035
- Christine Kaiser, M.D.Santa Rosa, CA 954031023192267
- Zeyad Kanaan, M.D.Santa Rosa, CA 954031144412560
- Leroy Wayne Keiser, M.D.Santa Rosa, CA 954031417047283
- Yao Yao Pollock, MDSanta Rosa, CA 954031154692549
Common questions
What is Ian Churchill Anderson, M.D.'s NPI number?
Ian Churchill Anderson, M.D.'s National Provider Identifier (NPI) is 1518055573, issued on Oct 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ian Churchill Anderson, M.D. located?
The NPPES record lists a practice address at 3555 Round Barn Cir, Santa Rosa, CA, 95403. Phone: (707) 528-1050. Providers update this record themselves, so call before visiting.
How can I verify Ian Churchill Anderson, M.D.'s license?
NPPES lists California license number A49481, 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 Ian Churchill Anderson, M.D. prescribe under Medicare Part D?
In 2024, Ian Churchill Anderson, M.D. had 2,030 Medicare Part D claims for 366 beneficiaries; the average among hematology & oncology physician prescribers was 877. 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.