Doctor profile · Federal record

Dr. Kar Own, MD

Nephrology Physician (CMS: Nephrology) · Vallejo, CA

  • NPI 1558449454
  • Accepts Medicare
  • 38 yrs in practice
  • Male
  • Group practice
  • No sanctions

Practice & contact

NPPES Updated May 11, 2026
Primary practice
975 Sereno Dr
Vallejo, CA 945892441
(707) 651-1000
Mailing address
1800 Harrison St Fl 7
Oakland, CA 946123466

Credentials & registration

NPPES · NUCC
NPI registered
November 2006 — 20 yrs on file
Profile last updated
December 17, 2021
Year of graduation
1988 — 38 yrs since
Specialty taxonomy
207RN0300X — NUCC code
State license (1)
California #A53485
Medicaid
CA #00A534850

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1558449454. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
71
Distinct HCPCS
1
Medicare allowed
$5,987
HCPCS Description Services Patients Avg allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 71 13 $84

In context: peer comparison

Among 3 peers in Vallejo Nephrology Physician, average services per provider: 62. This provider delivers 1.1× the peer median.

Medicare Part D · 2023

Top prescriptions

CMS Part D Prescriber
Total claims
462
Patients
129
Total drug cost
$45,892
Drug Type Claims Patients Total cost
Calcitriol Generic 77 27 $1,616
Losartan Potassium Generic 61 26 $777
Amlodipine Besylate Generic 51 19 $608
Furosemide Generic 48 19 $649
Calcium Acetate Generic 40 18 $5,041
Sevelamer Carbonate Generic 36 20 $11,881
Clonidine Hcl Generic 29 0 $602
Jardiance (Empagliflozin) Brand 26 0 $16,995
Allopurinol Generic 24 0 $201
Hydralazine Hcl Generic 21 0 $459

Frequently asked questions

Auto-generated from federal data
What is Dr. Kar Own's medical specialty?
Dr. Kar Own practices Nephrology Physician in Vallejo, CA.
Where does Dr. Kar Own practice?
Dr. Kar Own practices at 975 Sereno Dr, Vallejo, CA 945892441. Office phone: 7076511000.
What is Dr. Kar Own's NPI?
Dr. Kar Own's National Provider Identifier (NPI) is 1558449454, issued by NPPES.
Does Dr. Kar Own accept Medicare assignment?
Yes. Dr. Kar Own accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Kar Own commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232). Source: CMS Medicare Physician & Other Practitioners file.