NPPES file of Aug 9, 2026

Wonsuk Warren Suh, M.D., M.P.H.

Radiation Oncology Physician · Santa Barbara, CA

Wonsuk Warren Suh, M.D., M.P.H. is a radiation oncology physician with a practice address in Santa Barbara, California, and NPI 1023068541, issued on May 12, 2006. Check the license (California C53785, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1023068541
Name
Wonsuk Warren Suh
Credential
M.D., M.P.H.
Primary taxonomy
Radiation Oncology Physician 2085R0001X
License number
C53785 CA
Self-reported in NPPES; status is on the state search
Practice location
300 W Pueblo St, Santa Barbara, CA 93105
Phone
(805) 682-7300
Enumerated
May 12, 2006
Record last updated
Oct 21, 2014 (not updated in 12 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20091022000197); accepts Medicare assignment
Medical or professional school
University Of Chicago, Pritzker School Of Medicine, 1996
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 300 W Pueblo St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Lindsay Blount, M.D.Radiation Oncology Physician1558417568
  2. David Carlson, M.D.Nuclear Medicine Physician1902133465
  3. George Cheng, M.D.Radiation Oncology Physician1750437745
  4. Shane Cotter, M.D.Radiation Oncology Physician1467643718
  5. Mark Hauser, MDEmergency Medicine Physician1447294301
  6. Sylvia Kim, MDEmergency Medicine Physician1366496085

Verify Wonsuk Warren Suh in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license C53785
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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35% fewer Medicare Part D claims than the average radiation oncology physician in 2024

87 Medicare Part D claims for 31 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.

  1. Wonsuk Suh87
  2. Specialty average134

Most prescribed

  1. Tamsulosin Hcl68 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: $105.58

1 payment: food and beverage; the largest payer was Sumitomo Pharma America, 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.

  1. Wonsuk Suh$105.58
  2. Specialty average$1,897.85

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

  1. Sansum ClinicSanta Barbara, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Wonsuk Warren Suh among 735 radiation oncology physician records in California

Wonsuk Warren Suh, M.D., M.P.H. 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 2006, is newer than 16% of them.

  • NPI issued2006 · 16% of these records are older, 55% newer
  • In a Medicare fileYes · 83% of these records are
  • In the CMS Doctors and Clinicians fileYes · 74% of these records are
  • Graduated1996 · median 2005 among the 545 with a school on file
  • Record last updated2014 · 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.

The 8 radiation oncology physician records with the nearest ZIP codes

  1. Lindsay Blount, M.D.Santa Barbara, CA 931051558417568
  2. George Cheng, M.D.Santa Barbara, CA 931051750437745
  3. Shane Cotter, M.D.Santa Barbara, CA 931051467643718
  4. Hyo Kim, M.D.Santa Barbara, CA 931051093752750
  5. Justin Voog, M.D., PH.D.Santa Barbara, CA 931051396001152
  6. Carol Pattillo, MDSanta Barbara, CA 931081710228598
  7. Eugene Ahn, MDSimi Valley, CA 930651912999533
  8. Ari Kassardjian, MDSimi Valley, CA 930651689200115

Common questions

What is Wonsuk Warren Suh, M.D., M.P.H.'s NPI number?

Wonsuk Warren Suh, M.D., M.P.H.'s National Provider Identifier (NPI) is 1023068541, issued on May 12, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Wonsuk Warren Suh, M.D., M.P.H. located?

The NPPES record lists a practice address at 300 W Pueblo St, Santa Barbara, CA, 93105. Phone: (805) 682-7300. Providers update this record themselves, so call before visiting.

How can I verify Wonsuk Warren Suh, M.D., M.P.H.'s license?

NPPES lists California license number C53785, 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 Wonsuk Warren Suh, M.D., M.P.H. prescribe under Medicare Part D?

In 2024, Wonsuk Warren Suh, M.D., M.P.H. had 87 Medicare Part D claims for 31 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.