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Ramdas Nanda Kumar, M.D.

NPI 1669631248ActiveIndividual· Internal Medicine, Nephrology· Thousand Oaks, CA

Internal Medicine, Nephrology (M.D.) in Thousand Oaks, California, trained at St. Louis College of Physicians and Surgeons (class of 2005). In 2024 Medicare paid $539,819 for 1,011 patients, and Part D covered 2,176 of their prescriptions, 77% of them generic. Amgen Inc. was the largest of 20 companies reporting payments in 2025, $5,462 in all, mostly consulting fees.

Overview

NPI1669631248
StatusActive
Entity typeIndividual
CredentialM.D.
Sole proprietorNo
NPI issuedJun 9, 2008
Last updated in NPPESApr 10, 2018

Specialties and licenses

TaxonomyCodeLicenseState
Internal Medicine, Nephrology Primary207RN0300XA115199CA
Internal Medicine207R00000XA115199CA

About license numbers in NPPES

Exclusion screening

ListResultDetails
HHS-OIG LEIE · Nov 10, 2026No matchChecked by NPI and by name + state
North Carolina Medicaid · Nov 11, 2026No match—
New York OMIG · Nov 11, 2026No match—
Ohio Medicaid · Nov 11, 2026No match—
Pennsylvania Medicheck · Nov 11, 2026No match—
Washington HCA · Nov 11, 2026No match—

Official OIG search · How matching works ·Bulk check a roster

Medicare

Enrollment (PECOS)Enrolled Practitioner - Nephrology (CA); Practitioner - Internal Medicine (TX)
Accepts assignmentYes (participating)

Medicare services in 2024

Medicare patients1,011
Services billed7,347 across 27 procedure codes
Paid by Medicare$539,819

Part D prescriptions in 2024

Prescriptions (claims)2,176 · 4,762 30-day fills
Patients312
Total drug cost$660,144
Generic share77% of claims

Medicare sources and data years

Education and affiliations

Medical schoolSt. Louis College of Physicians and Surgeons
Graduation year2005
Medicare specialtyNephrology
Secondary specialtiesInternal Medicine
TelehealthOffers telehealth

Medical group

Hospital affiliations

Other facilities

Source: CMS Care Compare

Industry payments (Open Payments)

  • 2025$5,462 · 77 payments from 20 companies
  • 2024$2,549 · 75 payments from 12 companies

Top paying companies in 2025

What the 2025 payments were for

  • Consulting Fee$3,285 · 1 payment
  • Food and Beverage$2,166 · 75 payments
  • Education$10.68 · 1 payment

Receiving payments does not imply wrongdoing. What Open Payments covers ·original records

Other nephrologists in Thousand Oaks

All nephrologists in California