Karthikeyan Viswanathan, DO

4 locations

17 plans · 2 carriers

Licence C19044 · Surrendered

Licence status: Surrendered · since 1957 · University of Illinois College of Medicine. Board flags: Surrender of License.

Licensee has surrendered his or her license to resolve a disciplinary or licensing action. No practice is permitted.

Matched on the licence number without its letter prefix; check the name before relying on it.

Public record actions

$1,140

Medicare paid this office $1,140 for 35 people.

This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.

Who their Medicare patients are

35 Original Medicare patients in 2024. Average age 71 · Women 54% · Also on Medicaid 66% · Health risk score 1.28. At or below the middle of the specialty; the typical internal medicine clinician is at 1.76.

Conditions among them: High blood pressure 74% · Diabetes 54% · Chronic kidney disease 34%.

The office billed $5,647, Medicare allowed $1,162 and paid $1,140; for 82 services of 20 kinds.

Original Medicare patients only. A risk score of 1.0 is the average Medicare patient; higher means sicker. Any count under 11 is hidden.

Year by year

Original Medicare only. A service billed for fewer than 11 people in a year is hidden, so the lines can add up to less than the year's total.

$10,059 in 2020

Medicaid paid $10,059 for 22 billed services this clinician did in 2020, up to 21 people in a month for one service.

Medicaid and CHIP claims where this clinician did the service, fee-for-service and managed care together. Any month with fewer than 11 patients is hidden, so small Medicaid practices undercount.

$66,958

Pharmacies billed $66,958 in 2024.

This is pharmacy cost, not the office bill, and not what patients paid.

302 generic and fewer than 11 brand-name prescriptions · $66,958 in drug cost.

Part D prescriptions only. The opioid rate is opioid prescriptions as a share of all this clinician's Part D prescriptions; surgeons and pain specialists run higher than others, so it is shown against the same specialty.

Year by year

Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.

$29 in 2025

Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.

A payment is not proof that care is biased.

NPI

1396128336

Licence

AR E-12291, CA 19044California C19044: Surrendered

Gender

Male