Chad Michael Guenther, MD
Hematology & Oncology Physician · Santa Barbara, CA
Chad Michael Guenther, MD is a hematology & oncology physician with a practice address in Santa Barbara, California, and NPI 1063874758, issued on Mar 22, 2016. Check the license (California A184597, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Chad Michael Guenther
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License numbers
- A184597 CA
73001 WI
Self-reported in NPPES; status is on the state search - Practice location
- 540 W Pueblo St, Santa Barbara, CA 93105
- Phone
- (805) 879-0670
- Enumerated
- Mar 22, 2016
- Record last updated
- Aug 24, 2023
- Medicare enrollment
- Enrolled (PECOS I20230705002727); accepts Medicare assignment
- Medical or professional school
- University Of Wisconsin School Of Medicine, 2016
- 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 540 W Pueblo St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mark Abate, M.D.Hematology & Oncology Physician1588778674
- Mohammed Abu Zaanona, MDHematology & Oncology Physician1922591197
- Hannah AndrewsGenetic Counselor (M.S.)1447636337
- Maira Campos, M.D.Hematology & Oncology Physician1497020861
- Monica ChenFamily Nurse Practitioner1326767633
- William Conway, MDSurgical Oncology Physician1962626390
Verify Chad Michael Guenther in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A184597Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
21% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
691 Medicare Part D claims for 130 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. 30 claims were for opioids.
Most prescribed
- Prednisone54 claims
- Eliquis50 claims
- Acyclovir45 claims
- Anastrozole41 claims
- Levothyroxine Sodium24 claims
- Potassium Chloride23 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.
Bills Medicare through one group practice
- Sansum ClinicSantsa Barbara, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Chad Michael Guenther among 1,583 hematology & oncology physician records in California
Chad Michael Guenther, MD 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 2016, is newer than 87% of them.
- NPI issued2016 · 87% of these records are older, 11% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2016 · median 2003 among the 1,124 with a school on file
- Record last updated2023 · 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 Barbara → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Mark Abate, M.D.Santa Barbara, CA 931051588778674
- Asma Anwar, MDSanta Barbara, CA 931051972773539
- Maira Campos, M.D.Santa Barbara, CA 931051497020861
- Julian Davis, MDSanta Barbara, CA 931051801159967
- Frederic Kass, MDSanta Barbara, CA 931051538181110
- Ryan Kendle, M.D.Santa Barbara, CA 931051861719551
- Yurhee Lee, M.D.Santa Barbara, CA 931051457887606
- Gregg Newman, M.D.Santa Barbara, CA 931051275645053
Common questions
What is Chad Michael Guenther, MD's NPI number?
Chad Michael Guenther, MD's National Provider Identifier (NPI) is 1063874758, issued on Mar 22, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Chad Michael Guenther, MD located?
The NPPES record lists a practice address at 540 W Pueblo St, Santa Barbara, CA, 93105. Phone: (805) 879-0670. Providers update this record themselves, so call before visiting.
How can I verify Chad Michael Guenther, MD's license?
NPPES lists California license number A184597, 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 Chad Michael Guenther, MD prescribe under Medicare Part D?
In 2024, Chad Michael Guenther, MD had 691 Medicare Part D claims for 130 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.