Anterior Cruciate LigamentArthroplasty, Replacement, KneeKnee Joint
Dr. Tharun Karthikeyan, MD
NPI1922200468PAC ID9739371626
- Medicare services, 2024
- 1,508
- Medicare patients, 2024
- 441
- Part D claims, 2024
- 2,050
- Publications
- 9
- Clinical trials
- 1
- Practice address
- One Saint Joseph Drive, Lexington, KY 40504
- Practice phone
- Call (859) 313-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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. Tharun Karthikeyan is an orthopedic surgeon in Lexington, Kentucky
Dr. Karthikeyan practices at Saint Joseph Hospital in Lexington, Kentucky, part of CommonSpirit Health.
Dr. Karthikeyan's NPI, 1922200468, was assigned on June 5, 2007. Dr. Karthikeyan graduated from University of Pittsburgh School of Medicine in 2005. Dr. Karthikeyan holds Kentucky license 45545.
NPI and contact details
- NPI
- 1922200468NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9739371626
- NPI enumeration date
- June 5, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (859) 313-1000
- 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 Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Tharun Karthikeyan practices at 2 locations in Lexington, Kentucky
Dr. Karthikeyan's primary practice is Saint Joseph Hospital, at One Saint Joseph Drive, Lexington, KY 40504 in Fayette County. The practice phone is (859) 313-1000. Dr. Karthikeyan also practices at St Joseph Hospital, 1 St Joseph Dr, Lexington, KY 40504.
- Saint Joseph HospitalPrimaryOne Saint Joseph Drive, Lexington, KY 40504 · Fayette CountyPhone(859) 313-1000
- St Joseph Hospital1 St Joseph Dr, Lexington, KY 40504 · Fayette CountyPhone(859) 313-1000
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. Tharun Karthikeyan is affiliated with 10 sites of care and 6 medical groups
Dr. Karthikeyan's primary practice is Saint Joseph Hospital in Lexington, Kentucky, part of CommonSpirit Health. The medical group on file is Lexington Clinic. Dmand AI also links Dr. Karthikeyan to 5 more group practices and clinics, 5 medical groups, 3 home health agencies and 1 therapy and rehab clinic, each named with a free account.
Lexington Clinic5 group practices and clinicsNames with a free account5 medical groupsNames with a free account3 home health agenciesNames with a free account1 therapy and rehab clinicName with a free account
See all 16 affiliations for Dr. KarthikeyanSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Tharun Karthikeyan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Karthikeyan practices, 10 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Saint Joseph Hospital | Available with a free account |
| +9 more sites and 5 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every hospital where Dr. Karthikeyan practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across CommonSpirit Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Tharun Karthikeyan is one of 291 orthopedic surgeons in Kentucky
Orthopaedic surgery is Dr. Karthikeyan's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dmand AI has Dr. Karthikeyan's licenses on file in 3 states: Kentucky, North Carolina and Pennsylvania.
Specialties and state licenses
- Orthopaedic surgery, KentuckyPrimary
- North Carolina license
- Pennsylvania license
Orthopedic surgeons near Dr. Karthikeyan
Counts of orthopedic surgeons with a Dmand AI profile, by place and practice. Each opens the list.
291orthopedic surgeons in Kentucky56orthopedic surgeons in Lexington6orthopedic surgeons at Saint Joseph Hospital
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Tharun Karthikeyan billed Medicare for 1,508 services in 2024
CMS data shows 1,508 Medicare services from Dr. Karthikeyan across 16 procedure codes in 2024, for 441 Medicare patients. Medicare paid $273,918 for them.
Medicare services, 20241,508
Medicare patients441
Paid by Medicare$273,918
Procedure codes16
Dr. Karthikeyan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4392024: 66351%
- Drugs given in the office
- 2023: 5542024: 46117%
- Surgery
- 2023: 3712024: 3844%
Where Dr. Karthikeyan's Medicare services took place, 2024
- In an office1,22081%
- In a facility28819%
Dr. Karthikeyan compared with the Kentucky median for orthopedic surgeons, 2024
- Dr. Karthikeyan
- Kentucky median
- Medicare services
- 1,508vs 1,20925% above
- Medicare patients
- 441vs 25772% above
- Part D claims
- 2,004vs 2468.1 times
Medians across 291 orthopedic surgeons in Kentucky 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 orthopedic surgeons in Kentucky.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Tharun Karthikeyan treated 441 Medicare patients in 2024, average age 74
CMS counts 441 Medicare patients who saw Dr. Karthikeyan in 2024. The largest group is 65 to 74, with 223 patients. 75% of them have arthritis, and 75% have high blood pressure. 6% are also on Medicaid. Their average risk score is 1.10, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Karthikeyan's median patient age at 72, with 62% women.
Medicare patients, 2024441
Average age74
Average risk score1.10
Also on Medicaid6%
Dr. Karthikeyan's Medicare patients by age, 2024
Dr. Karthikeyan's Medicare patients by sex, 2024
- Women28665%
- Men15535%
Chronic conditions among Dr. Karthikeyan's Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol75%
- Anxiety37%
- Mood disorders31%
- Depression28%
- Ischemic heart disease26%
- Chronic kidney disease25%
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 72
Patient panel by sex, all payers
- Women62%
- Men38%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Tharun Karthikeyan wrote 2,050 Medicare Part D claims in 2024
In 2024, Dr. Karthikeyan wrote 2,050 Medicare Part D claims for 573 patients. 96% of them were for generic drugs. CMS names the drug for 2,004 of them, across 15 drugs with 11 or more claims each, at $13,991 in total drug cost. In 2023, CMS named 1,917 claims across 15 drugs.
Part D claims, 20242,050
Drugs named by CMS15
Total drug cost$13,991
Part D patients573
Dr. Karthikeyan's Part D claims by kind of drug, 2024
- Generic1,975 claims96%
- Brand-name75 claims4%
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.
Drug classes CMS tracks in Dr. Karthikeyan's Part D claims, 2024
- Opioids40%820 of 2,050 claims
- Antibiotics14%281 of 2,050 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: 1,9172024: 2,0045%
Drugs named by CMS: 15 in 2024, 15 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. Tharun Karthikeyan ranks in the 97th percentile for knee replacement in Medicare
Dr. Karthikeyan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 151 procedures of knee replacement by Dr. Karthikeyan, more than 97% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Karthikeyan ranks in Medicare procedure volume
- Knee replacement
- 97th percentile151 procedures
- Hip replacement
- 95th percentile78 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
For MedTech and pharma teams
Find orthopedic surgeons like Dr. Karthikeyan by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Tharun Karthikeyan has 9 publications on record
Dmand AI links 9 papers to Dr. Karthikeyan, published from 2013 to 2016. 2015 was the busiest year, with 4. The most frequent topics are Arthroplasty, Replacement, Knee, Patient Satisfaction and Reoperation. Dr. Karthikeyan has published most often in J Arthroplasty. Dr. Karthikeyan's most frequent co-authors are Christian Paul Christensen, MD, Robert Paul Cope, DO and Thomas Keith Fehring, MD.
Papers9
Years published2013 to 2016
Dr. Karthikeyan's papers by year, 2013 to 2016
Topics Dr. Karthikeyan writes about most
- Arthroplasty, Replacement, Knee
- Patient Satisfaction
- Reoperation
- Pain, Postoperative
- Arthroplasty, Replacement, Hip
- Knee Joint
- Osteoarthritis, Knee
- Prosthesis Failure
Dr. Karthikeyan's most frequent co-authors
- Christian Paul Christensen, MD8 shared papers
- Robert Paul Cope, DO1 shared paper
- Thomas Keith Fehring, MD1 shared paper
Recent publications by Dr. Karthikeyan
Arthroplasty, Replacement, KneeBone MarrowBone Marrow Diseases
Arthroplasty, Replacement, KneeKentuckyMovement
AnxietyArthroplasty, Replacement, KneeDepression
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 orthopedic surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Tharun Karthikeyan has worked on 1 clinical trial
Dmand AI links Dr. Karthikeyan to 1 clinical trial. Conditions studied include Osteonecrosis and Necrosis.
Conditions in Dr. Karthikeyan's trials
- Osteonecrosis
- Necrosis
Investigators on the most trials with Dr. Karthikeyan
Recent clinical trials with Dr. Karthikeyan
OsteonecrosisNecrosisTritanium® Primary Acetabular Shell
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Tharun Karthikeyan received $30,573 in industry payments from 2016 to 2025
CMS Open Payments shows 105 general payments to Dr. Karthikeyan from 11 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 60% of the total. Zimmer Biomet Holdings, Inc. paid the most, $19,231.
General payments to Dr. Karthikeyan by program year, 2016 to 2025
General payments to Dr. Karthikeyan by kind, 2016 to 2025
$30.6Kin total
- Consulting fees$18,45060%
- Food and beverage$6,64522%
- Travel and lodging$4,08913%
- Education$1,3895%
Companies that paid Dr. Karthikeyan 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. Tharun Karthikeyan graduated from University of Pittsburgh School of Medicine
Dr. Karthikeyan graduated from University of Pittsburgh School of Medicine in 2005.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Tharun 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 Affiliation DataDmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand 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)Doctors and Clinicians Utilization Data (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 |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (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 |
| 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. Tharun 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. Tharun Karthikeyan's NPI number?
Dr. Tharun Karthikeyan's NPI number is 1922200468. It was assigned on June 5, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Tharun Karthikeyan?
Dr. Tharun Karthikeyan is an orthopedic surgeon in Lexington, Kentucky. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. Tharun Karthikeyan practice?
Dr. Karthikeyan practices at One Saint Joseph Drive, Lexington, KY 40504. Dr. Karthikeyan also practices at 1 St Joseph Dr, Lexington, KY 40504. Dr. Karthikeyan's primary practice is Saint Joseph Hospital in Lexington, Kentucky, part of CommonSpirit Health. Dmand AI also links Dr. Karthikeyan to 5 group practices and clinics, 5 medical groups, 3 home health agencies and 1 therapy and rehab clinic.
What is Dr. Tharun Karthikeyan's office phone number?
The practice phone on file for Dr. Karthikeyan is (859) 313-1000.
What is Dr. Tharun Karthikeyan's medical license number?
Dr. Karthikeyan holds Kentucky license 45545, one of the licenses on file in 3 states.
Which states has Dr. Tharun Karthikeyan been licensed in?
Dmand AI has state licenses on file for Dr. Karthikeyan in Kentucky, North Carolina and Pennsylvania.
Which hospitals is Dr. Tharun Karthikeyan affiliated with?
Dr. Karthikeyan practices at Saint Joseph Hospital in Lexington, Kentucky.
What medical group is Dr. Tharun Karthikeyan part of?
Dr. Karthikeyan is linked to Lexington Clinic. Dmand AI links Dr. Karthikeyan to 5 more medical groups.
Does Dr. Tharun Karthikeyan accept Medicare?
Yes. CMS data shows Dr. Karthikeyan billed Medicare for 1,508 services in 2024, and Dr. Karthikeyan accepts Medicare assignment.
How many Medicare patients does Dr. Tharun Karthikeyan see?
CMS counts 441 Medicare patients who saw Dr. Karthikeyan in 2024, with an average age of 74.
Show 7 more questionsShow fewer questions
What services does Dr. Tharun Karthikeyan bill to Medicare?
In 2024, Dr. Karthikeyan's most billed Medicare services were injected or infused drug (J3301), office visit, established patient (99214) and office visit, established patient (99213).
Where did Dr. Tharun Karthikeyan go to medical school?
Dr. Karthikeyan graduated from University of Pittsburgh School of Medicine in 2005.
What drugs does Dr. Tharun Karthikeyan prescribe most?
In 2024 Medicare Part D data, Dr. Karthikeyan's most prescribed drugs by claims were Oxycodone-Acetaminophen, Meloxicam and Pregabalin.
Has Dr. Tharun Karthikeyan received payments from drug or device companies?
CMS Open Payments shows $30,573 in general payments to Dr. Karthikeyan from 11 companies from 2016 to 2025. The largest total came from Zimmer Biomet Holdings, Inc.
How long has Dr. Tharun Karthikeyan been practicing?
Dr. Karthikeyan graduated from medical school in 2005, 21 years ago.
Does Dr. Tharun Karthikeyan do research?
Dmand AI links 9 publications to Dr. Karthikeyan, published from 2013 to 2016. Dr. Karthikeyan has worked on 1 clinical trial.
Who does Dr. Tharun Karthikeyan publish with?
Dr. Karthikeyan's most frequent co-authors are Christian Paul Christensen, MD (8 shared papers), Robert Paul Cope, DO (1 shared paper) and Thomas Keith Fehring, MD (1 shared paper).
Selling to orthopaedic surgery practices?
See orthopedic surgeons in Kentucky by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card