Matthew Stanley Karp, MD
Emergency Medicine Physician · Lakeport, CA
Matthew Stanley Karp, MD is an emergency medicine physician with a practice address in Lakeport, California, and NPI 1417282823, issued on Oct 3, 2009. Check the license (California A125117, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Matthew Stanley Karp
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A125117 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5176 Hill RD E, Lakeport, CA 95453
- Phone
- (707) 262-5050
- Enumerated
- Oct 3, 2009
- Record last updated
- Feb 4, 2022
- Medicare enrollment
- Enrolled (PECOS I20150929003522); accepts Medicare assignment
- Medical or professional school
- University Of California, Davis School Of Medicine, 2011
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 5176 Hill RD E
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Matthew Stanley Karp in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A125117Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
21% more Medicare Part D claims than the average emergency medicine physician in 2024
274 Medicare Part D claims for 184 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims. 41 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen34 claims
- Doxycycline Hyclate25 claims
- Cephalexin24 claims
- Ondansetron Odt19 claims
- Ibuprofen17 claims
- Naproxen17 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- San Francisco Emergency Medical AssociatesLakeport, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Matthew Stanley Karp among 7,751 emergency medicine physician records in California
Matthew Stanley Karp, MD is one of 7,751 emergency 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 2009, is newer than 54% of them.
- NPI issued2009 · 54% of these records are older, 42% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2011 · median 2011 among the 4,560 with a school on file
- Record last updated2022 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Lakeport → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Edward Fedun, MDLakeport, CA 954531982614061
- Christian Hackshaw, M.D.Lakeport, CA 954531881637023
- Gary Taff, M.D.Little River, CA 954561467577437
- Elizabeth Faulk, M.D.Healdsburg, CA 954481033179882
- Andrew Karozos, M.D.Healdsburg, CA 954481871797852
- Marc Paris, M.D.Healdsburg, CA 954481114028040
- Timothy Saunders, MDHealdsburg, CA 954481164623476
- Michael Newdow, MDNice, CA 954641245265966
Common questions
What is Matthew Stanley Karp, MD's NPI number?
Matthew Stanley Karp, MD's National Provider Identifier (NPI) is 1417282823, issued on Oct 3, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Matthew Stanley Karp, MD located?
The NPPES record lists a practice address at 5176 Hill RD E, Lakeport, CA, 95453. Phone: (707) 262-5050. Providers update this record themselves, so call before visiting.
How can I verify Matthew Stanley Karp, MD's license?
NPPES lists California license number A125117, 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 Matthew Stanley Karp, MD prescribe under Medicare Part D?
In 2024, Matthew Stanley Karp, MD had 274 Medicare Part D claims for 184 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Matthew Stanley Karp, MD's MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.