Cathryn Barbara Howarth, MD
Pediatric Hematology & Oncology Physician · Santa Barbara, CA
Cathryn Barbara Howarth, MD is a pediatric hematology & oncology physician with a practice address in Santa Barbara, California, and NPI 1881733731, issued on Feb 6, 2007. Check the license (California A34496, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Cathryn Barbara Howarth
- Credential
- MD
- Primary taxonomy
- Pediatric Hematology & Oncology Physician 2080P0207X
- License number
- A34496 CA
Self-reported in NPPES; status is on the state search - Practice location
- 320 West Pueblo Street, Santa Barbara, CA 93102
- Phone
- (805) 569-8394
- Enumerated
- Feb 6, 2007
- Record last updated
- Jul 9, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (805) 569-8398
- Medicaid ID
- 00A344960 CA
- Entity
- Type 1 · individual
8 nearest pediatric hematology & oncology physician records → All 417 in California → Look up another NPI →
Verify Cathryn Barbara Howarth in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A34496Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
83% fewer Medicare Part D claims than the average pediatric hematology & oncology physician in 2024
16 Medicare Part D claims, against an average of 94 among the 300 providers of this specialty who prescribed in Part D.
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.
Cathryn Barbara Howarth among 417 pediatric hematology & oncology physician records in California
Cathryn Barbara Howarth, MD is one of 417 pediatric hematology & oncology physician records with a practice address in California. 53% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 35% of them.
- NPI issued2007 · 35% of these records are older, 47% newer
- In a Medicare fileYes · 53% of these records are
- In the CMS Doctors and Clinicians fileNo · 29% of these records are
- Record last updated2007 · 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 2080P0207X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatric Hematology & Oncology Physician providers in California
There are 417 pediatric hematology & oncology physician records in California.
All 417 in California → Every provider in Santa Barbara → Pediatric Hematology & Oncology Physician nationwide →
The 8 pediatric hematology & oncology physician records with the nearest ZIP codes
- Asneha Iqbal, MDGoleta, CA 931111336428820
- David Slomiany, MDGoleta, CA 931111518934710
- Shivani Upadhyay, M.D.Santa Barbara, CA 931111073788360
- Francisco Bracho, M.D.Ventura, CA 930031154329209
- Geoffrey Cheng, MDOrange, CA 928681003307687
- Navid Djassemi, MDOrange, CA 928681447754031
- Jamie Frediani, M.D.Orange, CA 928681447540505
- Megan Gooch, MDOrange, CA 928681184041634
Common questions
What is Cathryn Barbara Howarth, MD's NPI number?
Cathryn Barbara Howarth, MD's National Provider Identifier (NPI) is 1881733731, issued on Feb 6, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Cathryn Barbara Howarth, MD located?
The NPPES record lists a practice address at 320 West Pueblo Street, Santa Barbara, CA, 93102. Phone: (805) 569-8394. Providers update this record themselves, so call before visiting.
How can I verify Cathryn Barbara Howarth, MD's license?
NPPES lists California license number A34496, 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 Cathryn Barbara Howarth, MD prescribe under Medicare Part D?
In 2024, Cathryn Barbara Howarth, MD had 16 Medicare Part D claims; the average among pediatric hematology & oncology physician prescribers was 94. 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.