Peter Louis Karlsberg, M.D.
Specialist · Ventura, CA
Peter Louis Karlsberg, M.D. is a specialist with a practice address in Ventura, California, and NPI 1063560605, issued on Jan 8, 2007. Check the license (California G80832, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Peter Louis Karlsberg
- Credential
- M.D.
- Primary taxonomy
- Specialist 174400000X
- License number
- G80832 CA
Self-reported in NPPES; status is on the state search - Practice location
- 145 N Brent St, Ventura, CA 93003
- Phone
- (805) 641-1600
- Enumerated
- Jan 8, 2007
- Record last updated
- Jul 30, 2022
- Medicare enrollment
- Enrolled (PECOS I20050426001321); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 1991
- Entity
- Type 1 · individual
8 nearest specialist records → All 5,749 in California → Look up another NPI →
Also registered at 145 N Brent St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Dominic Tedesco, M.D.Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician1942300330
Verify Peter Louis Karlsberg in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license G80832Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
41% fewer Medicare Part D claims than the average specialist in 2024
818 Medicare Part D claims for 355 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims.
Most prescribed
- Triamcinolone Acetonide192 claims
- Doxycycline Monohydrate90 claims
- Ketoconazole82 claims
- Mupirocin69 claims
- Clobetasol Propionate45 claims
- Hydrocortisone41 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.
The MIPS final score for 2023 (Medicare payment program): 14.3 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $279.68
18 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 5,844 providers of this specialty with any payment received $4,760.79 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
- Peter L. Karlsberg, M.D. A Medical CorporationVentura, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Peter Louis Karlsberg among 5,749 specialist records in California
Peter Louis Karlsberg, M.D. is one of 5,749 specialist records with a practice address in California. 30% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 40% of them.
- NPI issued2007 · 40% of these records are older, 44% newer
- In a Medicare fileYes · 30% of these records are
- In the CMS Doctors and Clinicians fileYes · 19% of these records are
- Graduated1991 · median 1989 among the 1,075 with a school on file
- Record last updated2022 · 77% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Specialist providers in California
There are 5,749 specialist records in California.
All 5,749 in California → Every provider in Ventura → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- Helmuth Billy, M.D.Ventura, CA 930031447317664
- Mark Chaney, A.T.C.Ventura, CA 930031912973777
- Deborah Gates, CERTIFIED ORTHOTISTVentura, CA 930031366406555
- Terri Gee, LMTVentura, CA 930031124058656
- Robert HensonVentura, CA 930031790834331
- Neil Jacobson, PTVentura, CA 930031972509917
- Jillanne McCarty, M.D., PH.D.Ventura, CA 930031316038367
- Kirk Richards, PTVentura, CA 930031609872639
Common questions
What is Peter Louis Karlsberg, M.D.'s NPI number?
Peter Louis Karlsberg, M.D.'s National Provider Identifier (NPI) is 1063560605, issued on Jan 8, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Peter Louis Karlsberg, M.D. located?
The NPPES record lists a practice address at 145 N Brent St, Ventura, CA, 93003. Phone: (805) 641-1600. Providers update this record themselves, so call before visiting.
How can I verify Peter Louis Karlsberg, M.D.'s license?
NPPES lists California license number G80832, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Peter Louis Karlsberg, M.D. prescribe under Medicare Part D?
In 2024, Peter Louis Karlsberg, M.D. had 818 Medicare Part D claims for 355 beneficiaries; the average among specialist prescribers was 1,380. Part D covers Medicare prescriptions only.
What is Peter Louis Karlsberg, M.D.'s MIPS final score?
The 2023 MIPS final score is 14.3 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.