NPPES file of Aug 9, 2026

Susan Tosh Butler, M.D.

MOHS-Micrographic Surgery Physician · San Carlos, CA

Susan Tosh Butler, M.D. is a mohs-micrographic surgery physician with a practice address in San Carlos, California, and NPI 1013118843, issued on May 30, 2007. Check the license (California A111303, 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
1013118843
Name
Susan Tosh Butler
Credential
M.D.
Primary taxonomy
MOHS-Micrographic Surgery Physician 207ND0101X
License number
A111303 CA
Self-reported in NPPES; status is on the state search
Practice location
301 Industrial RD FL 3, San Carlos, CA 94070
Phone
(650) 596-4160
Enumerated
May 30, 2007
Record last updated
Oct 9, 2020 (not updated in 6 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20101021000360); accepts Medicare assignment
Medical or professional school
University Of Michigan Medical School, 2004
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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Verify Susan Tosh Butler in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A111303
    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

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63% fewer Medicare Part D claims than the average mohs-micrographic surgery physician in 2024

213 Medicare Part D claims for 105 beneficiaries, against an average of 570 among the 1,396 providers of this specialty who prescribed in Part D.

  1. Susan Butler213
  2. Specialty average570

Most prescribed

  1. Cephalexin30 claims
  2. Mupirocin24 claims
  3. Clindamycin Phosphate21 claims
  4. Fluorouracil21 claims
  5. Doxycycline Hyclate19 claims
  6. Desonide11 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: $422.63

14 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 1,074 providers of this specialty with any payment received $4,075.23 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Susan Butler$422.63
  2. Specialty average$4,075.23

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. Sutter Bay Medical FoundationPalo Alto, CA

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

MOHS-Micrographic Surgery Physician providers in California

There are 164 mohs-micrographic surgery physician records in California.

Other mohs-micrographic surgery physician records in California

  1. Sumaira Aasi, MDStanford, CA1780675181
  2. Faud Abuabara, M.D.Mountain View, CA1164472890
  3. Ji Won Ahn, MDWalnut Creek, CA1023460243
  4. Adam Aronson, M.D.Sherman Oaks, CA1629465778
  5. Sarah Arron, M.D., PH.D.Burlingame, CA1255463725
  6. Jennifer Baron, MDSan Jose, CA1902927148
  7. Derek Beaulieu, MDSanta Barbara, CA1376033043
  8. Kourosh Beroukhim, M.D.Long Beach, CA1063866150
  9. Dina Bierman, M.D.Santa Monica, CA1659627115
  10. Jeffrey Binstock, MDMill Valley, CA1780677526

Common questions

What is Susan Tosh Butler, M.D.'s NPI number?

Susan Tosh Butler, M.D.'s National Provider Identifier (NPI) is 1013118843, issued on May 30, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Susan Tosh Butler, M.D. located?

The NPPES record lists a practice address at 301 Industrial RD FL 3, San Carlos, CA, 94070. Phone: (650) 596-4160. Providers update this record themselves, so call before visiting.

How can I verify Susan Tosh Butler, M.D.'s license?

NPPES lists California license number A111303, 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 Susan Tosh Butler, M.D. prescribe under Medicare Part D?

In 2024, Susan Tosh Butler, M.D. had 213 Medicare Part D claims for 105 beneficiaries; the average among mohs-micrographic surgery physician prescribers was 570. 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.