NPPES file of Aug 9, 2026

Ramdas Nanda Kumar, M.D.

Nephrology Physician · Thousand Oaks, CA

Ramdas Nanda Kumar, M.D. is a nephrology physician with a practice address in Thousand Oaks, California, and NPI 1669631248, issued on Jun 9, 2008. Check the license (California A115199, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1669631248
Name
Ramdas Nanda Kumar
Credential
M.D.
Primary taxonomy
Nephrology Physician 207RN0300X
License number
A115199 CA
Self-reported in NPPES; status is on the state search
Practice location
227 W Janss RD, Thousand Oaks, CA 91360
Phone
(805) 496-5800
Enumerated
Jun 9, 2008
Record last updated
Apr 10, 2018 (not updated in 8 years: call before relying on the address or phone)
Fax
(805) 834-1088
Medicare enrollment
Enrolled (PECOS I20180108003069); accepts Medicare assignment
Medical or professional school
St. Louis College Of Physicians And Surgeons, 2005
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest nephrology physician records → All 1,468 in California → Look up another NPI →

Also registered at 227 W Janss RD

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Lawrence Baker, M.D.Pulmonary Disease Physician1922000983
  2. Philip Barry, MDOrthopaedic Surgery Physician1255330775
  3. Daniel Benhamou, MDStudent in an Organized Health Care Education/Training Program1639970981
  4. Paul Block, M.D.Pulmonary Disease Physician1598767550
  5. Harry Cozen, M.D.Anesthesiology Physician1114998846
  6. Vishva Dev, M.D.Interventional Cardiology Physician1770513723

Verify Ramdas Nanda Kumar in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A115199    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

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49% more Medicare Part D claims than the average nephrology physician in 2024

2,176 Medicare Part D claims for 312 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D.

  1. Ramdas Kumar2,176
  2. Specialty average1,465

Most prescribed

  1. Amlodipine Besylate229 claims
  2. Farxiga196 claims
  3. Chlorthalidone161 claims
  4. Losartan Potassium106 claims
  5. Allopurinol92 claims
  6. Carvedilol83 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.

Industry payments in 2024: $2,549.15

72 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 8,230 providers of this specialty with any payment received $3,091.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Ramdas Kumar$2,549.15
  2. Specialty average$3,091.37

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Renal Consultants Medical GroupThousand Oaks, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Ramdas Nanda Kumar among 1,468 nephrology physician records in California

Ramdas Nanda Kumar, M.D. 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 2008, is newer than 65% of them.

  • NPI issued2008 · 65% of these records are older, 30% newer
  • In a Medicare fileYes · 88% of these records are
  • In the CMS Doctors and Clinicians fileYes · 77% of these records are
  • Graduated2005 · median 2001 among the 1,128 with a school on file
  • Record last updated2018 · 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 Thousand Oaks → Nephrology Physician nationwide →

The 8 nephrology physician records with the nearest ZIP codes

  1. Paul Finkel, M.D.Thousand Oaks, CA 913601275533499
  2. Arian Gower, M.D.Thousand Oaks, CA 913601639531403
  3. Richard Lessman, M.D.Thousand Oaks, CA 913601073513263
  4. Salah Sonbol, M.D.Thousand Oaks, CA 913601922008119
  5. Anthony Capparelli, M.D.Thousand Oaks, CA 913611033119946
  6. Alan Fozailoff, M.D.Tarzana, CA 913561053331595
  7. Isaac Gorbaty, M.D.Tarzana, CA 913561477562718
  8. Kamyar Kamjoo, MDTarzana, CA 913561558465708

Common questions

What is Ramdas Nanda Kumar, M.D.'s NPI number?

Ramdas Nanda Kumar, M.D.'s National Provider Identifier (NPI) is 1669631248, issued on Jun 9, 2008. An NPI identifies a provider in billing; it is not a license.

Where is Ramdas Nanda Kumar, M.D. located?

The NPPES record lists a practice address at 227 W Janss RD, Thousand Oaks, CA, 91360. Phone: (805) 496-5800. Providers update this record themselves, so call before visiting.

How can I verify Ramdas Nanda Kumar, M.D.'s license?

NPPES lists California license number A115199, 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 Ramdas Nanda Kumar, M.D. prescribe under Medicare Part D?

In 2024, Ramdas Nanda Kumar, M.D. had 2,176 Medicare Part D claims for 312 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.