Dr. Ramdas Nanda Kumar, MD
- Medicare services, 2024
- 7,309
- Medicare patients, 2024
- 1,011
- Part D claims, 2024
- 2,176
- Hospital affiliations
- 4
- Industry payments
- $15,242
- Practice address
- 227 W Janss Rd, Thousand Oaks, CA 91360
- Practice phone
- Call (805) 371-0455
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Thousand Oaks Endoscopy Center, LLC
Thousand Oaks, California
Find Dr. Kumar's professional email, personal email and mobile number
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Dr. Ramdas Nanda Kumar is a nephrologist in Thousand Oaks, California
Dr. Kumar practices at Thousand Oaks Endoscopy Center, LLC in Thousand Oaks, California.
Dr. Kumar's NPI, 1669631248, was assigned on June 9, 2008. Dr. Kumar graduated from Saint Louis University School Of Medicine in 2005. Dr. Kumar holds California license A115199.
- NPI
- 1669631248NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4688850282
- NPI enumeration date
- June 9, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (805) 371-0455
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ramdas Nanda Kumar practices at Thousand Oaks Endoscopy Center, LLC in Thousand Oaks, California
Dr. Kumar's primary practice is Thousand Oaks Endoscopy Center, LLC, at 227 W Janss Rd, Thousand Oaks, CA 91360 in Ventura County. The practice phone is (805) 371-0455.
- Thousand Oaks Endoscopy Center, LLC227 W Janss Rd, Thousand Oaks, CA 91360 · Ventura CountyPhone(805) 371-0455
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Ramdas Nanda Kumar is affiliated with 9 sites of care and 2 medical groups
Dr. Kumar's primary practice is Thousand Oaks Endoscopy Center, LLC in Thousand Oaks, California. Dr. Kumar is also affiliated with Los Robles Regional Medical Center. The medical group on file is Renal Consultants Medical Group. Dmand AI also links Dr. Kumar to 3 more hospitals, 3 dialysis centers, 1 group practice or clinic and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Ramdas Nanda Kumar's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kumar practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Thousand Oaks Endoscopy Center, LLC | Available with a free account |
| +8 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ramdas Nanda Kumar is one of 1,401 nephrologists in California
Nephrology is Dr. Kumar's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Kumar is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Kumar's licenses on file in 3 states: California, Texas and Illinois.
Specialties and state licenses
- Nephrology, CaliforniaPrimary
- Texas license
- Illinois license
Clinical focus
Dmand AI lists acute kidney failure, chronic anemia, chronic kidney disease, fluid and electrolyte imbalances, hypercalcemia and kidney cysts among the conditions Dr. Kumar treats.
Nephrologists near Dr. Kumar
Counts of nephrologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Ramdas Nanda Kumar billed Medicare for 7,309 services in 2024
CMS data shows 7,309 Medicare services from Dr. Kumar across 20 procedure codes in 2024, for 1,011 Medicare patients. Medicare paid $532,762 for them.
Dr. Kumar's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4,9212024: 6,00222%
- Other services
- 2023: 02024: 948
- Tests and treatments
- 2023: 2572024: 2653%
- Imaging
- 2023: 902024: 944%
Where Dr. Kumar's Medicare services took place, 2024
- In an office4,98068%
- In a facility2,32932%
Dr. Kumar compared with the California median for nephrologists, 2024
- Dr. Kumar
- California median
- Medicare services
- 7,309vs 1,0846.7 times
- Medicare patients
- 1,011vs 3073.3 times
- Part D claims
- 1,944vs 9552.0 times
Medians across 1,355 nephrologists in California with Dmand AI profiles that report each measure.
Dr. Kumar's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Kumar and other nephrologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ramdas Nanda Kumar treated 1,011 Medicare patients in 2024, average age 79
CMS counts 1,011 Medicare patients who saw Dr. Kumar in 2024. The largest group is 75 to 84, with 427 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 33% are also on Medicaid. Their average risk score is 3.18, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Kumar's median patient age at 76, with 40% women.
Dr. Kumar's Medicare patients by age, 2024
Dr. Kumar's Medicare patients by sex, 2024
- Women47147%
- Men54053%
Chronic conditions among Dr. Kumar's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Arthritis62%
- Ischemic heart disease62%
- Diabetes59%
- Heart failure59%
- Atrial fibrillation43%
Share of Medicare patients with each condition. A patient can have several.
Dr. Kumar's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 76
Patient panel by sex, all payers
- Women40%
- Men58%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ramdas Nanda Kumar wrote 2,176 Medicare Part D claims in 2024
In 2024, Dr. Kumar wrote 2,176 Medicare Part D claims for 312 patients. 77% of them were for generic drugs. CMS names the drug for 1,944 of them, across 40 drugs with 11 or more claims each, at $426,895 in total drug cost. In 2023, CMS named 1,608 claims across 35 drugs.
Dr. Kumar's Part D claims by kind of drug, 2024
- Generic1,675 claims77%
- Brand-name and other501 claims23%
Dr. Kumar's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Kumar's Part D claims, 2024
- Antibiotics1%20 of 2,176 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,6082024: 1,94421%
Drugs named by CMS: 40 in 2024, 35 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Ramdas Nanda Kumar offers telehealth to Medicare patients
Dr. Kumar accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Kumar as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Ramdas Nanda Kumar received $15,242 in industry payments from 2016 to 2025
CMS Open Payments shows 405 general payments to Dr. Kumar from 38 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 74% of the total. Amgen Inc. paid the most, $5,196.
General payments to Dr. Kumar by program year, 2016 to 2025
General payments to Dr. Kumar by kind, 2016 to 2025
- Food and beverage$11,35374%
- Consulting fees$3,28522%
- Speaker and faculty fees$4823%
- Education$1221%
Companies that paid Dr. Kumar the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Ramdas Nanda Kumar graduated from Saint Louis University School Of Medicine
Dr. Kumar graduated from Saint Louis University School Of Medicine in 2005.
- Medical school
- Board certified in internal medicine
- Board certified in nephrology
Source: Dmand AI Professional Profile Data
Dr. Ramdas Nanda Kumar accepts plans from 10 insurance carriers
Dr. Kumar is in network with 10 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- Humana
- Blue Cross Blue Shield of Massachusetts
- HCSC
- LA Care
- Molina
- +2 more carriersWith a free account
Plan types Dr. Kumar accepts, by number of carriers
- Medicare10
- PPO7
- HMO6
- POS3
- EPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. Ramdas Nanda Kumar's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Ramdas Nanda Kumar
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Ramdas Nanda Kumar's NPI number?
Dr. Ramdas Nanda Kumar's NPI number is 1669631248. It was assigned on June 9, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Ramdas Nanda Kumar?
Dr. Ramdas Nanda Kumar is a nephrologist in Thousand Oaks, California. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Ramdas Nanda Kumar practice?
Dr. Kumar practices at 227 W Janss Rd, Thousand Oaks, CA 91360. Dr. Kumar's primary practice is Thousand Oaks Endoscopy Center, LLC in Thousand Oaks, California. Dmand AI also links Dr. Kumar to 3 hospitals, 3 dialysis centers, 1 group practice or clinic and 1 medical group.
What is Dr. Ramdas Nanda Kumar's office phone number?
The practice phone on file for Dr. Kumar is (805) 371-0455.
What is Dr. Ramdas Nanda Kumar's medical license number?
Dr. Kumar holds California license A115199, one of the licenses on file in 3 states.
Which states has Dr. Ramdas Nanda Kumar been licensed in?
Dmand AI has state licenses on file for Dr. Kumar in California (2010 to 2026), Texas (2010 to 2021) and Illinois (2005 to 2008).
Which hospitals is Dr. Ramdas Nanda Kumar affiliated with?
Dr. Kumar is affiliated with Los Robles Regional Medical Center. Dmand AI links Dr. Kumar to 3 more hospitals.
What medical group is Dr. Ramdas Nanda Kumar part of?
Dr. Kumar is linked to Renal Consultants Medical Group. Dmand AI links Dr. Kumar to 1 more medical group.
Does Dr. Ramdas Nanda Kumar accept Medicare?
Yes. CMS data shows Dr. Kumar billed Medicare for 7,309 services in 2024, and Dr. Kumar accepts Medicare assignment.
Does Dr. Ramdas Nanda Kumar offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Kumar as offering telehealth services.
Show 8 more questionsShow fewer questions
How many Medicare patients does Dr. Ramdas Nanda Kumar see?
CMS counts 1,011 Medicare patients who saw Dr. Kumar in 2024, with an average age of 79.
Is Dr. Ramdas Nanda Kumar board certified?
Yes. Dr. Kumar is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Ramdas Nanda Kumar bill to Medicare?
In 2024, Dr. Kumar's most billed Medicare services were hospital inpatient care (99233), care management and other visits (99458) and medicare service (G2211).
Where did Dr. Ramdas Nanda Kumar go to medical school?
Dr. Kumar graduated from Saint Louis University School Of Medicine in 2005.
What drugs does Dr. Ramdas Nanda Kumar prescribe most?
In 2024 Medicare Part D data, Dr. Kumar's most prescribed drugs by claims were Amlodipine Besylate, Farxiga and Chlorthalidone.
Has Dr. Ramdas Nanda Kumar received payments from drug or device companies?
CMS Open Payments shows $15,242 in general payments to Dr. Kumar from 38 companies from 2016 to 2025. The largest total came from Amgen Inc.
How long has Dr. Ramdas Nanda Kumar been practicing?
Dr. Kumar graduated from medical school in 2005, 21 years ago.
What insurance does Dr. Ramdas Nanda Kumar accept?
Dr. Kumar is in network with 10 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 10. Check the plan with the practice before a visit.
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