Kathleen L. Horan, M.D.
Family Medicine Physician · Santa Rosa, CA
Kathleen L. Horan, M.D. is a family medicine physician with a practice address in Santa Rosa, California, and NPI 1558422717, issued on Dec 12, 2006. Check the license (California G35154, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Kathleen L. Horan
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G35154 CA
Self-reported in NPPES; status is on the state search - Practice location
- 131 Stony Cir Ste 1600, Santa Rosa, CA 95401
- Phone
- (707) 541-7700
- Enumerated
- Dec 12, 2006
- Record last updated
- Mar 7, 2023
- Fax
- (707) 573-5415
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 131 Stony Cir Ste 1600
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Leslie Brouillette, NPFamily Nurse Practitioner1962652479
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Verify Kathleen L. Horan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G35154Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
100% fewer Medicare Part D claims than the average family medicine physician in 2024
13 Medicare Part D claims, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Kathleen L. Horan among 17,133 family medicine physician records in California
Kathleen L. Horan, M.D. is one of 17,133 family medicine physician records with a practice address in California. 81% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- 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 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
264 family medicine physician records list a practice address in Santa Rosa
They are 264 of the 6,884 NPPES records with a practice address in Santa Rosa, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Santa Rosa → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Roberta Berg, MDSanta Rosa, CA 954011689643884
- Jennifer Betts, MDSanta Rosa, CA 954011518965771
- Lambert Daniel, MDSanta Rosa, CA 954011487688941
- Ellen Kruusmagi, MDSanta Rosa, CA 954011003831793
- Marshall Kubota, MDSanta Rosa, CA 954011245297969
- Patricia Kulawiak, MDSanta Rosa, CA 954011487649711
- Carla Longchamp, M.D.Santa Rosa, CA 954011972544948
- Jeremy Mesches, MDSanta Rosa, CA 954011245207026
Common questions
What is Kathleen L. Horan, M.D.'s NPI number?
Kathleen L. Horan, M.D.'s National Provider Identifier (NPI) is 1558422717, issued on Dec 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kathleen L. Horan, M.D. located?
The NPPES record lists a practice address at 131 Stony Cir Ste 1600, Santa Rosa, CA, 95401. Phone: (707) 541-7700. Providers update this record themselves, so call before visiting.
How can I verify Kathleen L. Horan, M.D.'s license?
NPPES lists California license number G35154, 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 Kathleen L. Horan, M.D. prescribe under Medicare Part D?
In 2024, Kathleen L. Horan, M.D. had 13 Medicare Part D claims; the average among family medicine physician prescribers was 3,544. 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.