Dr. Vanji Karthikeyan, MD
- Medicare services, 2024
- 475
- Medicare patients, 2024
- 160
- Part D claims, 2024
- 375
- Publications
- 7
- Hospital affiliations
- 3
- Practice address
- 25710 Kelly Rd, Roseville, MI 48066
- Practice phone
- Call (586) 779-8779
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Greenfield Health Systems
Roseville, Michigan
Find Dr. Karthikeyan's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Vanji Karthikeyan is a nephrologist in Roseville, Michigan
Dr. Karthikeyan practices at Greenfield Health Systems in Roseville, Michigan.
Dr. Karthikeyan's NPI, 1003984550, was assigned on December 1, 2006. Dr. Karthikeyan holds Michigan license 4301067479.
- NPI
- 1003984550NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2264562032
- NPI enumeration date
- December 1, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (586) 779-8779
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Vanji Karthikeyan practices at Greenfield Health Systems in Roseville, Michigan
Dr. Karthikeyan's primary practice is Greenfield Health Systems, at 25710 Kelly Rd, Roseville, MI 48066 in Macomb County. The practice phone is (586) 779-8779.
- Greenfield Health Systems25710 Kelly Rd, Roseville, MI 48066 · Macomb CountyPhone(586) 779-8779
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Vanji Karthikeyan is affiliated with 6 sites of care and 1 medical group
Dr. Karthikeyan's primary practice is Greenfield Health Systems in Roseville, Michigan. Dr. Karthikeyan is also affiliated with Henry Ford Hospital. The medical group on file is Henry Ford Health. Dmand AI also links Dr. Karthikeyan to 2 more hospitals and 2 dialysis centers, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Vanji Karthikeyan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Karthikeyan practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Greenfield Health Systems | Available with a free account |
| +5 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Vanji Karthikeyan is one of 310 nephrologists in Michigan
Nephrology is Dr. Karthikeyan's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Karthikeyan is licensed in Michigan.
Specialties and state licenses
- Nephrology, MichiganPrimary
Nephrologists near Dr. Karthikeyan
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. Vanji Karthikeyan billed Medicare for 475 services in 2024
CMS data shows 475 Medicare services from Dr. Karthikeyan across 7 procedure codes in 2024, for 160 Medicare patients. Medicare paid $70,568 for them.
Dr. Karthikeyan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2882024: 3077%
- Tests and treatments
- 2023: 2342024: 16828%
Where Dr. Karthikeyan's Medicare services took place, 2024
- In an office6514%
- In a facility41086%
Dr. Karthikeyan compared with the Michigan median for nephrologists, 2024
- Dr. Karthikeyan
- Michigan median
- Medicare services
- 475vs 84944% below
- Medicare patients
- 160vs 26941% below
- Part D claims
- 253vs 57456% below
Medians across 310 nephrologists in Michigan with Dmand AI profiles that report each measure.
Dr. Karthikeyan'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.
Need commercial claims for Dr. Karthikeyan?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Karthikeyan and other nephrologists in Michigan.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Vanji Karthikeyan treated 160 Medicare patients in 2024, average age 73
CMS counts 160 Medicare patients who saw Dr. Karthikeyan in 2024. The largest group is 65 to 74, with 49 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 30% are also on Medicaid. Their average risk score is 5.48, 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. Karthikeyan's median patient age at 73, with 47% women.
Dr. Karthikeyan's Medicare patients by age, 2024
Dr. Karthikeyan's Medicare patients by sex, 2024
- Women8151%
- Men7949%
Chronic conditions among Dr. Karthikeyan's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Heart failure61%
- Diabetes60%
- Ischemic heart disease57%
- Arthritis51%
- Atrial fibrillation41%
Share of Medicare patients with each condition. A patient can have several.
Dr. Karthikeyan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women47%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Vanji Karthikeyan wrote 375 Medicare Part D claims in 2024
In 2024, Dr. Karthikeyan wrote 375 Medicare Part D claims for 71 patients. 95% of them were for generic drugs. CMS names the drug for 253 of them, across 14 drugs with 11 or more claims each, at $19,302 in total drug cost. In 2023, CMS named 253 claims across 12 drugs.
Dr. Karthikeyan's Part D claims by kind of drug, 2024
- Generic355 claims95%
- Brand-name20 claims5%
Dr. Karthikeyan'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2532024: 253No change
Drugs named by CMS: 14 in 2024, 12 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
How Dr. Vanji Karthikeyan takes part in Medicare
Dr. Karthikeyan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Vanji Karthikeyan has 7 publications on record
Dmand AI links 7 papers to Dr. Karthikeyan, published from 2010 to 2020. 2020 was the busiest year, with 2. The most frequent topics are Kidney Failure, Chronic, Kidney Transplantation and Chi-Square Distribution. Dr. Karthikeyan has published most often in Transplant Proc. Dr. Karthikeyan's most frequent co-authors are Karthikeyan Ananthasubramaniam, MD, George J. Alangaden, MD and Tamim Abdallah Hamdi, MD.
Dr. Karthikeyan's papers by year, 2010 to 2020
Topics Dr. Karthikeyan writes about most
- Kidney Failure, Chronic
- Kidney Transplantation
- Chi-Square Distribution
- Michigan
Dr. Karthikeyan's most frequent co-authors
- Karthikeyan Ananthasubramaniam, MD2 shared papers
- George J. Alangaden, MD1 shared paper
- Tamim Abdallah Hamdi, MD1 shared paper
Recent publications by Dr. Karthikeyan
See who Dr. Karthikeyan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Karthikeyan works with, so you can find a warm path to the right nephrologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Vanji Karthikeyan received $465 in industry payments from 2016 to 2024
CMS Open Payments shows 7 general payments to Dr. Karthikeyan from 7 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 78% of the total. Calliditas Therapeutics US Inc. paid the most, $116.
General payments to Dr. Karthikeyan by program year, 2016 to 2024
General payments to Dr. Karthikeyan by kind, 2016 to 2024
- Food and beverage$36578%
- Education$10022%
Companies that paid Dr. Karthikeyan the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Vanji Karthikeyan'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 DataDmand AI Org Hierarchy 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Vanji Karthikeyan
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. Vanji Karthikeyan's NPI number?
Dr. Vanji Karthikeyan's NPI number is 1003984550. It was assigned on December 1, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Vanji Karthikeyan?
Dr. Vanji Karthikeyan is a nephrologist in Roseville, Michigan. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Vanji Karthikeyan practice?
Dr. Karthikeyan practices at 25710 Kelly Rd, Roseville, MI 48066. Dr. Karthikeyan's primary practice is Greenfield Health Systems in Roseville, Michigan. Dmand AI also links Dr. Karthikeyan to 2 hospitals and 2 dialysis centers.
What is Dr. Vanji Karthikeyan's office phone number?
The practice phone on file for Dr. Karthikeyan is (586) 779-8779.
What is Dr. Vanji Karthikeyan's medical license number?
Dr. Karthikeyan holds Michigan license 4301067479.
Which hospitals is Dr. Vanji Karthikeyan affiliated with?
Dr. Karthikeyan is affiliated with Henry Ford Hospital. Dmand AI links Dr. Karthikeyan to 2 more hospitals.
What medical group is Dr. Vanji Karthikeyan part of?
Dr. Karthikeyan is linked to Henry Ford Health.
Does Dr. Vanji Karthikeyan accept Medicare?
Yes. CMS data shows Dr. Karthikeyan billed Medicare for 475 services in 2024, and Dr. Karthikeyan accepts Medicare assignment.
How many Medicare patients does Dr. Vanji Karthikeyan see?
CMS counts 160 Medicare patients who saw Dr. Karthikeyan in 2024, with an average age of 73.
What services does Dr. Vanji Karthikeyan bill to Medicare?
In 2024, Dr. Karthikeyan's most billed Medicare services were hospital inpatient care (99232), dialysis (90960) and office visit, established patient (99215).
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What drugs does Dr. Vanji Karthikeyan prescribe most?
In 2024 Medicare Part D data, Dr. Karthikeyan's most prescribed drugs by claims were Losartan Potassium, Lisinopril and Prednisone.
Has Dr. Vanji Karthikeyan received payments from drug or device companies?
CMS Open Payments shows $465 in general payments to Dr. Karthikeyan from 7 companies from 2016 to 2024. The largest total came from Calliditas Therapeutics US Inc.
How long has Dr. Vanji Karthikeyan been practicing?
Dr. Karthikeyan graduated from medical school in 1993, 33 years ago.
Does Dr. Vanji Karthikeyan do research?
Dmand AI links 7 publications to Dr. Karthikeyan, published from 2010 to 2020.
Who does Dr. Vanji Karthikeyan publish with?
Dr. Karthikeyan's most frequent co-authors are Karthikeyan Ananthasubramaniam, MD (2 shared papers), George J. Alangaden, MD (1 shared paper) and Tamim Abdallah Hamdi, MD (1 shared paper).
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