Dr. Arjun Natarajan, MD
- Medicare services, 2024
- 164
- Medicare patients, 2024
- 61
- Part D claims, 2024
- 73
- MIPS score, 2024
- 99
- Hospital affiliations
- 2
- Practice address
- 4440 W 95th Street, Oak Lawn, IL 60453
- Practice phone
- Call (708) 684-8000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Natarajan's professional email, personal email and mobile number
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Dr. Arjun Natarajan is a medical oncologist in Oak Lawn, Illinois
Dr. Natarajan practices at Advocate Christ Medical Center in Oak Lawn, Illinois, part of Advocate Health.
Dr. Natarajan's NPI, 1144682642, was assigned on March 23, 2016. Dr. Natarajan holds Illinois license 036.170026.
- NPI
- 1144682642NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3274828165
- NPI enumeration date
- March 23, 2016
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (708) 684-8000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Arjun Natarajan practices at Advocate Christ Medical Center in Oak Lawn, Illinois
Dr. Natarajan's primary practice is Advocate Christ Medical Center, at 4440 W 95th Street, Oak Lawn, IL 60453 in Cook County. The practice phone is (708) 684-8000.
- Advocate Christ Medical Center4440 W 95th Street, Oak Lawn, IL 60453 · Cook CountyPhone(708) 684-8000
Source: Dmand AI Affiliation Data
Dr. Arjun Natarajan is affiliated with 3 sites of care and 1 medical group
Dr. Natarajan's primary practice is Advocate Christ Medical Center in Oak Lawn, Illinois, part of Advocate Health. Dr. Natarajan is also affiliated with Advocate Good Samaritan Hospital. The medical group on file is Dreyer Medical Clinic (Advocate Medical Group). Dmand AI also links Dr. Natarajan to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Arjun Natarajan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Natarajan practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Advocate Christ Medical Center | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Arjun Natarajan is one of 153 medical oncologists in Illinois
Medical oncology is Dr. Natarajan's primary specialty in the NPI Registry, under taxonomy code 207RX0202X. Dmand AI has Dr. Natarajan's licenses on file in 2 states: Illinois and Missouri.
Specialties and state licenses
- Medical oncology, IllinoisPrimary
- Internal medicine, Missouri
Medical oncologists near Dr. Natarajan
Counts of medical oncologists 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. Arjun Natarajan billed Medicare for 164 services in 2024
CMS data shows 164 Medicare services from Dr. Natarajan across 4 procedure codes in 2024, for 61 Medicare patients. Medicare paid $6,472 for them. Every service was in an office.
Dr. Natarajan's Medicare services by type, 2022 to 2024
- 2022
- 2024
- Surgery
- 2022: 02024: 93
- Office and hospital visits
- 2022: 1002024: 7129%
Dr. Natarajan compared with the Illinois median for medical oncologists, 2024
- Dr. Natarajan
- Illinois median
- Medicare services
- 164vs 67176% below
- Medicare patients
- 61vs 23073% below
- Part D claims
- 12vs 34597% below
Medians across 140 medical oncologists in Illinois with Dmand AI profiles that report each measure.
Dr. Natarajan'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Arjun Natarajan treated 61 Medicare patients in 2024, average age 76
CMS counts 61 Medicare patients who saw Dr. Natarajan in 2024. The largest group is 65 to 74, with 23 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.46, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Natarajan's median patient age at 74, with 58% women.
Dr. Natarajan's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Natarajan's Medicare patients by sex, 2024
- Women3964%
- Men2236%
Chronic conditions among Dr. Natarajan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis57%
- Ischemic heart disease44%
- Chronic kidney disease36%
- Diabetes36%
- Mood disorders34%
- Cancer33%
Share of Medicare patients with each condition. A patient can have several.
Dr. Natarajan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women58%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Arjun Natarajan wrote 73 Medicare Part D claims in 2024
In 2024, Dr. Natarajan wrote 73 Medicare Part D claims for 22 patients. 88% of them were for generic drugs. CMS names the drug for 12 of them, across 1 drug with 11 or more claims each, at $162 in total drug cost. In 2021, CMS named 74 claims across 5 drugs.
Dr. Natarajan's Part D claims by kind of drug, 2024
- Generic64 claims88%
- Brand-name and other9 claims12%
Dr. Natarajan's most prescribed drugs by claims, 2022
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, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 742022: 1284%
Drugs named by CMS: 1 in 2022, 5 in 2021.
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. Arjun Natarajan scored 99 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 99 out of 100 for Dr. Natarajan for performance year 2024, reported through an alternative payment model (APM). Dr. Natarajan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Natarajan as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Natarajan's MIPS scores, performance year 2024
- 99of 100Final score
- 85.4of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Arjun Natarajan received $296 in industry payments from 2023 to 2024
CMS Open Payments shows 9 general payments to Dr. Natarajan from 7 drug and device companies from 2023 to 2024. Food and beverage make up the largest share, 80% of the total. Eli Lilly and Company paid the most, $85.
General payments to Dr. Natarajan by program year, 2023 to 2024
General payments to Dr. Natarajan by kind, 2023 to 2024
- Food and beverage$23780%
- Education$6020%
Companies that paid Dr. Natarajan the most, 2023 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Arjun Natarajan'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 | Dmand AI Affiliation 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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| 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. Arjun Natarajan
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. Arjun Natarajan's NPI number?
Dr. Arjun Natarajan's NPI number is 1144682642. It was assigned on March 23, 2016, and it is active in the NPI Registry.
What kind of doctor is Dr. Arjun Natarajan?
Dr. Arjun Natarajan is a medical oncologist in Oak Lawn, Illinois. The primary specialty in the NPI Registry is Medical Oncology Physician (taxonomy code 207RX0202X).
Where does Dr. Arjun Natarajan practice?
Dr. Natarajan practices at 4440 W 95th Street, Oak Lawn, IL 60453. Dr. Natarajan's primary practice is Advocate Christ Medical Center in Oak Lawn, Illinois, part of Advocate Health. Dmand AI also links Dr. Natarajan to 1 group practice or clinic.
What is Dr. Arjun Natarajan's office phone number?
The practice phone on file for Dr. Natarajan is (708) 684-8000.
What is Dr. Arjun Natarajan's medical license number?
Dr. Natarajan holds Illinois license 036.170026, one of the licenses on file in 2 states.
Which states has Dr. Arjun Natarajan been licensed in?
Dmand AI has state licenses on file for Dr. Natarajan in Illinois and Missouri.
Which hospitals is Dr. Arjun Natarajan affiliated with?
Dr. Natarajan practices at Advocate Christ Medical Center in Oak Lawn, Illinois. Dr. Natarajan is also affiliated with Advocate Good Samaritan Hospital.
What medical group is Dr. Arjun Natarajan part of?
Dr. Natarajan is linked to Dreyer Medical Clinic (Advocate Medical Group).
Does Dr. Arjun Natarajan accept Medicare?
Yes. CMS data shows Dr. Natarajan billed Medicare for 164 services in 2024, and Dr. Natarajan accepts Medicare assignment.
Does Dr. Arjun Natarajan offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Natarajan as offering telehealth services.
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What is Dr. Arjun Natarajan's MIPS score?
Dr. Natarajan's MIPS final score for performance year 2024 is 99 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. Arjun Natarajan see?
CMS counts 61 Medicare patients who saw Dr. Natarajan in 2024, with an average age of 76.
What services does Dr. Arjun Natarajan bill to Medicare?
In 2024, Dr. Natarajan's most billed Medicare services were surgery: heart and blood vessels (36415), office visit, established patient (99214) and office visit, new patient (99203).
What drugs does Dr. Arjun Natarajan prescribe most?
In 2022 Medicare Part D data, Dr. Natarajan's most prescribed drugs by claims were Pantoprazole Sodium.
Has Dr. Arjun Natarajan received payments from drug or device companies?
CMS Open Payments shows $296 in general payments to Dr. Natarajan from 7 companies from 2023 to 2024. The largest total came from Eli Lilly and Company.
How long has Dr. Arjun Natarajan been practicing?
Dr. Natarajan graduated from medical school in 2015, 11 years ago.
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