W Kiernan O'Callaghan
Internal Medicine Physician · Santa Barbara, CA
W Kiernan O'Callaghan is an internal medicine physician with a practice address in Santa Barbara, California, and NPI 1932294816, issued on Oct 4, 2006. Check the license (California G23727, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- W Kiernan O'Callaghan
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G23727 CA
Self-reported in NPPES; status is on the state search - Practice location
- 51 Hitchcock Way, Santa Barbara, CA 93105
- Phone
- (805) 681-1761
- Enumerated
- Oct 4, 2006
- Record last updated
- Nov 28, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (805) 681-1768
- Medicare enrollment
- Enrolled (PECOS I20121025000453); accepts Medicare assignment
- Medical or professional school
- Georgetown University School Of Medicine, 1971
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 51 Hitchcock Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify W Kiernan O'Callaghan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G23727Check 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 internal medicine physician in 2024
545 Medicare Part D claims for 373 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 23 claims were for opioids.
Most prescribed
- Prednisone95 claims
- Amoxicillin-Clavulanate Potass39 claims
- Cephalexin37 claims
- Azithromycin31 claims
- Nitrofurantoin Mono-Macro26 claims
- Doxycycline Hyclate24 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 ClinicSanta Barbara, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
W Kiernan O'Callaghan among 17,696 internal medicine physician records in California
W Kiernan O'Callaghan is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1971 · median 2004 among the 11,065 with a school on file
- Record last updated2012 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
129 internal medicine physician records list a practice address in Santa Barbara
They are 129 of the 5,328 NPPES records with a practice address in Santa Barbara, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Santa Barbara → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Laurel Bliss, MDSanta Barbara, CA 931051154368868
- David Dodson, M.DSanta Barbara, CA 931051619943834
- Patrick Frawley, MDSanta Barbara, CA 931051093707358
- Jeffrey Hadsall, M.D.Santa Barbara, CA 931051275641714
- William Koonce, MDSanta Barbara, CA 931051124010095
- Sandra Kramer, MDSanta Barbara, CA 931051104823418
Common questions
What is W Kiernan O'Callaghan's NPI number?
W Kiernan O'Callaghan's National Provider Identifier (NPI) is 1932294816, issued on Oct 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is W Kiernan O'Callaghan located?
The NPPES record lists a practice address at 51 Hitchcock Way, Santa Barbara, CA, 93105. Phone: (805) 681-1761. Providers update this record themselves, so call before visiting.
How can I verify W Kiernan O'Callaghan's license?
NPPES lists California license number G23727, 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 W Kiernan O'Callaghan prescribe under Medicare Part D?
In 2024, W Kiernan O'Callaghan had 545 Medicare Part D claims for 373 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.