Michael S. Karls, PAC
Physician Assistant · San Francisco, CA
Michael S. Karls, PAC is a physician assistant with a practice address in San Francisco, California, and NPI 1801804737, issued on Aug 4, 2006. Check the license (California PA17789, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Michael S. Karls
- Credential
- PAC
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA17789 CA
Self-reported in NPPES; status is on the state search - Practice location
- 45 Castro St, San Francisco, CA 94114
- Phone
- (415) 861-8627
- Enumerated
- Aug 4, 2006
- Record last updated
- Jul 25, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (415) 389-7455
- Medicare enrollment
- Enrolled (PECOS I20060105000755); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 45 Castro St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Michael S. Karls in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA17789Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
52% fewer Medicare Part D claims than the average physician assistant in 2024
398 Medicare Part D claims for 144 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Clobetasol Propionate98 claims
- Ciclopirox44 claims
- Desonide37 claims
- Triamcinolone Acetonide29 claims
- Mupirocin27 claims
- Minoxidil23 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: $5,283.29
178 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 64,719 providers of this specialty with any payment received $841.65 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.
Bills Medicare through one group practice
- Csi Medical GroupSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael S. Karls among 14,451 physician assistant records in California
Michael S. Karls, PAC is one of 14,451 physician assistant records with a practice address in California. 75% 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 1% of them.
- NPI issued2006 · 1% of these records are older, 87% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated1995 · median 2018 among the 7,214 with a school on file
- Record last updated2007 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Physician Assistant providers in California
There are 14,451 physician assistant records in California.
All 14,451 in California → Every provider in San Francisco → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Esther Brooking, PASan Francisco, CA 941141285057174
- Van Cam, PA-CSan Francisco, CA 941141295144822
- Maura Devereux, PA-CSan Francisco, CA 941141255562724
- Renee Kagan, PA-CSan Francisco, CA 941141154738359
- Martin Kramer, PA-CSan Francisco, CA 941141710001649
- Aileen Kucsera, PA-CSan Francisco, CA 941141316229230
- Elizabeth Lynch, PA-CSan Francisco, CA 941141073779609
- Jeffrey Manese, PA-CSan Francisco, CA 941141619023769
Common questions
What is Michael S. Karls, PAC's NPI number?
Michael S. Karls, PAC's National Provider Identifier (NPI) is 1801804737, issued on Aug 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael S. Karls, PAC located?
The NPPES record lists a practice address at 45 Castro St, San Francisco, CA, 94114. Phone: (415) 861-8627. Providers update this record themselves, so call before visiting.
How can I verify Michael S. Karls, PAC's license?
NPPES lists California license number PA17789, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Michael S. Karls, PAC prescribe under Medicare Part D?
In 2024, Michael S. Karls, PAC had 398 Medicare Part D claims for 144 beneficiaries; the average among physician assistant prescribers was 830. 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.