Karen Mai Horton, MD, MSC, FRCSC
Plastic Surgery Physician · San Francisco, CA
Karen Mai Horton, MD, MSC, FRCSC is a plastic surgery physician with a practice address in San Francisco, California, and NPI 1164463881, issued on Jun 10, 2006. Check the license (California A87734, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Karen Mai Horton
- Credential
- MD, MSC, FRCSC
- Primary taxonomy
- Plastic Surgery Physician 208200000X
- License number
- A87734 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2100 Webster St Ste 506, San Francisco, CA 94115
- Phone
- (415) 923-3067
- Enumerated
- Jun 10, 2006
- Record last updated
- Jul 3, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (415) 346-5019
- Entity
- Type 1 · individual
8 nearest plastic surgery physician records → All 894 in California → Look up another NPI →
Also registered at 2100 Webster St Ste 506
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ekama Carlson, MD, PHDMOHS-Micrographic Surgery Physician1245532159
Verify Karen Mai Horton in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A87734Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
70% fewer Medicare Part D claims than the average plastic surgery physician in 2024
28 Medicare Part D claims for 13 beneficiaries, against an average of 93 among the 3,527 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.
Industry payments in 2024: $1,981.83
31 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 3,683 providers of this specialty with any payment received $5,316.31 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.
Karen Mai Horton among 894 plastic surgery physician records in California
Karen Mai Horton, MD, MSC, FRCSC is one of 894 plastic surgery 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 3% of them.
- NPI issued2006 · 3% of these records are older, 61% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 39% of these records are
- Record last updated2018 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208200000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Plastic Surgery Physician providers in California
There are 894 plastic surgery physician records in California.
All 894 in California → Every provider in San Francisco → Plastic Surgery Physician nationwide →
The 8 plastic surgery physician records with the nearest ZIP codes
- Robert Anooshian, MDSan Francisco, CA 941151376622407
- Donald Brown, M.D.San Francisco, CA 941151831288919
- Stephen Daane, MDSan Francisco, CA 941151376644955
- Anandev Gurjala, M.D., M.S.San Francisco, CA 941151407180623
- Breanna Jedrzejewski, M.D., M.P.H.San Francisco, CA 941151912439134
- Jonathan Kaplan, MDSan Francisco, CA 941151700824828
- John Henry Pang, MDSan Francisco, CA 941151811223514
- Ziv Peled, MDSan Francisco, CA 941151427001338
Common questions
What is Karen Mai Horton, MD, MSC, FRCSC's NPI number?
Karen Mai Horton, MD, MSC, FRCSC's National Provider Identifier (NPI) is 1164463881, issued on Jun 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karen Mai Horton, MD, MSC, FRCSC located?
The NPPES record lists a practice address at 2100 Webster St Ste 506, San Francisco, CA, 94115. Phone: (415) 923-3067. Providers update this record themselves, so call before visiting.
How can I verify Karen Mai Horton, MD, MSC, FRCSC's license?
NPPES lists California license number A87734, 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 Karen Mai Horton, MD, MSC, FRCSC prescribe under Medicare Part D?
In 2024, Karen Mai Horton, MD, MSC, FRCSC had 28 Medicare Part D claims for 13 beneficiaries; the average among plastic surgery physician prescribers was 93. 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.