Karin E. Johnsen, DDS
Dentist · Highland, CA
Karin E. Johnsen, DDS is a dentist with a practice address in Highland, California, and NPI 1326109000, issued on Dec 13, 2006. Check the license (California 39423, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Karin E. Johnsen
- Credential
- DDS
- Primary taxonomy
- Dentist 122300000X
- License number
- 39423 CA
Self-reported in NPPES; status is on the state search - Practice location
- 6982 Boulder Avenue, Highland, CA 92346
- Phone
- (909) 862-2121
- Enumerated
- Dec 13, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (909) 862-6648
- Entity
- Type 1 · individual
8 nearest dentist records → All 14,729 in California → Look up another NPI →
Also registered at 6982 Boulder Avenue
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mark Johnsen, DDSDentist1245390988
Verify Karin E. Johnsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 39423Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
71% fewer Medicare Part D claims than the average dentist in 2024
25 Medicare Part D claims for 18 beneficiaries, against an average of 86 among the 51,021 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Amoxicillin18 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.
Karin E. Johnsen among 14,729 dentist records in California
Karin E. Johnsen, DDS is one of 14,729 dentist records with a practice address in California. 56% 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 2% of them.
- NPI issued2006 · 2% of these records are older, 82% newer
- In a Medicare fileYes · 56% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2007 · 73% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 122300000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
11 dentist records list a practice address in Highland
They are 11 of the 399 NPPES records with a practice address in Highland, and 14,729 dentist records in California.
All 14,729 in California → Every provider in Highland → Dentist nationwide →
The 8 dentist records with the nearest ZIP codes
- Jongyeob Choi, DDSHighland, CA 923461699553156
- Seunghwan Chung, DDSHighland, CA 923461629568688
- Brandon Dudar, DDSHighland, CA 923461124712542
- Michael Gardner, DDSHighland, CA 923461720690548
- Mark Johnsen, DDSHighland, CA 923461245390988
- Lawryn Monterroso, DDSHighland, CA 923461326422940
- Kelgynn Serbas, DMDHighland, CA 923461720716350
- Dhaval Shah, DDS MDSHighland, CA 923461750499182
Common questions
What is Karin E. Johnsen, DDS's NPI number?
Karin E. Johnsen, DDS's National Provider Identifier (NPI) is 1326109000, issued on Dec 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karin E. Johnsen, DDS located?
The NPPES record lists a practice address at 6982 Boulder Avenue, Highland, CA, 92346. Phone: (909) 862-2121. Providers update this record themselves, so call before visiting.
How can I verify Karin E. Johnsen, DDS's license?
NPPES lists California license number 39423, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Karin E. Johnsen, DDS prescribe under Medicare Part D?
In 2024, Karin E. Johnsen, DDS had 25 Medicare Part D claims for 18 beneficiaries; the average among dentist prescribers was 86. 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.