Kar H. Own, MD
Nephrology Physician · Vallejo, CA
Kar H. Own, MD is a nephrology physician with a practice address in Vallejo, California, and NPI 1558449454, issued on Nov 1, 2006. Check the license (California A53485, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Kar H. Own
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- A53485 CA
Self-reported in NPPES; status is on the state search - Practice location
- 975 Sereno Dr, Vallejo, CA 94589
- Phone
- (707) 651-1000
- Enumerated
- Nov 1, 2006
- Record last updated
- Dec 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 00A534850 CA
- Medicare enrollment
- Enrolled (PECOS I20101124001067); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,468 in California → Look up another NPI →
Also registered at 975 Sereno Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joel Aandahl, NPAdult Health Nurse Practitioner1891423653
- Noman Absar, MDCritical Care Medicine (Internal Medicine) Physician1205908951
- Anthony Acquaviva, MDUrology Physician1457439283
- Jhonnard James Acuna, CRNACertified Registered Nurse Anesthetist1205997327
- Omid AfshariPharmacist1184165391
- Eesha AftabStudent in an Organized Health Care Education/Training Program1770421687
Verify Kar H. Own in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A53485Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
59% fewer Medicare Part D claims than the average nephrology physician in 2024
606 Medicare Part D claims for 167 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Calcitriol82 claims
- Losartan Potassium62 claims
- Sevelamer Carbonate55 claims
- Amlodipine Besylate54 claims
- Calcium Acetate47 claims
- Jardiance29 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.
Bills Medicare through one group practice
- LA Clinica DE LA Raza IncVallejo, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kar H. Own among 1,468 nephrology physician records in California
Kar H. Own, MD is one of 1,468 nephrology physician records with a practice address in California. 88% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 48% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated1988 · median 2001 among the 1,128 with a school on file
- Record last updated2021 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in California
There are 1,468 nephrology physician records in California.
All 1,468 in California → Every provider in Vallejo → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Waseem Ahmad, MDVallejo, CA 945891366520108
- Hashem Dajani, MDVallejo, CA 945891174601918
- Julia Krasner, MDVallejo, CA 945891225116056
- Maung Myint, MDVallejo, CA 945891841378676
- Keyur Patel, MDVallejo, CA 945891942388772
- Caitlin Richardson-Royer, M.D.Vallejo, CA 945891922351881
- Maryam Sharif-Hassanabadi, M.D.Vallejo, CA 945891811287394
- Eric Lai, M.D.Pleasanton, CA 945881942592522
Common questions
What is Kar H. Own, MD's NPI number?
Kar H. Own, MD's National Provider Identifier (NPI) is 1558449454, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kar H. Own, MD located?
The NPPES record lists a practice address at 975 Sereno Dr, Vallejo, CA, 94589. Phone: (707) 651-1000. Providers update this record themselves, so call before visiting.
How can I verify Kar H. Own, MD's license?
NPPES lists California license number A53485, 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 Kar H. Own, MD prescribe under Medicare Part D?
In 2024, Kar H. Own, MD had 606 Medicare Part D claims for 167 beneficiaries; the average among nephrology physician prescribers was 1,465. 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.