Joseph Stephen Ryan, MD
Hematology & Oncology Physician · Santa Barbara, CA
Joseph Stephen Ryan, MD is a hematology & oncology physician with a practice address in Santa Barbara, California, and NPI 1588161178, issued on Apr 10, 2018. Check the license (California A164039, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Joseph Stephen Ryan
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- A164039 CA
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
- Apr 10, 2018
- Record last updated
- Aug 4, 2025
- Medicare enrollment
- Enrolled (PECOS I20211104002381); accepts Medicare assignment
- Medical or professional school
- University Of Washington School Of Medicine, 2018
- 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 Joseph Stephen Ryan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A164039Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
130 Medicare Part D claims for 43 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Acyclovir17 claims
- Anastrozole11 claims
- Dexamethasone11 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: $1,124.03
41 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Biotech, 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
- The Regents OF The University OF CaliforniaSanta Barbara, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joseph Stephen Ryan among 1,583 hematology & oncology physician records in California
Joseph Stephen Ryan, 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 2018, is newer than 92% of them.
- NPI issued2018 · 92% of these records are older, 5% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2018 · 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 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
- Chad Guenther, MDSanta Barbara, CA 931051063874758
- Frederic Kass, MDSanta Barbara, CA 931051538181110
- Ryan Kendle, M.D.Santa Barbara, CA 931051861719551
- Yurhee Lee, M.D.Santa Barbara, CA 931051457887606
Common questions
What is Joseph Stephen Ryan, MD's NPI number?
Joseph Stephen Ryan, MD's National Provider Identifier (NPI) is 1588161178, issued on Apr 10, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Joseph Stephen Ryan, 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 Joseph Stephen Ryan, MD's license?
NPPES lists California license number A164039, 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 Joseph Stephen Ryan, MD prescribe under Medicare Part D?
In 2024, Joseph Stephen Ryan, MD had 130 Medicare Part D claims for 43 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.