Dr. Jennifer Lee Kassir, MD
- Medicare services, 2024
- 3,198
- Medicare patients, 2024
- 369
- Part D claims, 2024
- 4,080
- Hospital affiliations
- 2
- Industry payments
- $41
- Practice address
- 430 Warrenville Rd., Ste. 110, Lisle, IL 60532
- Practice phone
- Call (630) 469-9200
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Duly Health and Care Lisle
Mammography / Breast Imaging Center · Lisle, Illinois
Find Dr. Kassir'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. Jennifer Lee Kassir is an internist in Lisle, Illinois
Dr. Kassir practices at Duly Health and Care Lisle in Lisle, Illinois.
Dr. Kassir's NPI, 1528214715, was assigned on August 7, 2008. Dr. Kassir holds Illinois license 036.120590.
- NPI
- 1528214715NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7618032392
- NPI enumeration date
- August 7, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (630) 469-9200
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- 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. Jennifer Lee Kassir practices at Duly Health and Care Lisle in Lisle, Illinois
Dr. Kassir's primary practice is Duly Health and Care Lisle, at 430 Warrenville Rd., Ste. 110, Lisle, IL 60532. The practice phone is (630) 469-9200.
- Duly Health and Care Lisle430 Warrenville Rd., Ste. 110, Lisle, IL 60532Phone(630) 469-9200
Source: Dmand AI Affiliation Data
Dr. Jennifer Lee Kassir is affiliated with 7 sites of care and 2 medical groups
Dr. Kassir's primary practice is Duly Health and Care Lisle in Lisle, Illinois. Dr. Kassir is also affiliated with Loyola University Medical Center. The medical group on file is Northwestern Medicine Regional Medical Group. Dmand AI also links Dr. Kassir to 1 more hospital, 2 group practices and clinics, 1 home health agency, 1 therapy and rehab clinic and 1 medical group, each named with a free account. Dr. Kassir's employer is on file too: a breast imaging center.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Jennifer Lee Kassir's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kassir practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Duly Health and Care Lisle | Available with a free account |
| +6 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Jennifer Lee Kassir is one of 5,652 internists in Illinois
Internal medicine is Dr. Kassir's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Kassir is licensed in Illinois.
Specialties and state licenses
- Internal medicine, IllinoisPrimary
Internists near Dr. Kassir
Counts of internists 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. Jennifer Lee Kassir billed Medicare for 3,198 services in 2024
CMS data shows 3,198 Medicare services from Dr. Kassir across 33 procedure codes in 2024, for 369 Medicare patients. Medicare paid $140,208 for them. Every service was in an office.
Dr. Kassir's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Lab and pathology
- 2023: 1,2642024: 1,2771%
- Office and hospital visits
- 2023: 8252024: 74610%
- Other services
- 2023: 3932024: 61556%
- Surgery
- 2023: 4522024: 4471%
- Tests and treatments
- 2023: 1642024: 11331%
Dr. Kassir compared with the Illinois median for internists, 2024
- Dr. Kassir
- Illinois median
- Medicare services
- 3,198vs 5665.7 times
- Medicare patients
- 369vs 20877% above
- Part D claims
- 3,600vs 28412.7 times
Medians across 5,192 internists in Illinois with Dmand AI profiles that report each measure.
Dr. Kassir'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. Kassir?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Kassir and other internists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Jennifer Lee Kassir treated 369 Medicare patients in 2024, average age 74
CMS counts 369 Medicare patients who saw Dr. Kassir in 2024. The largest group is 65 to 74, with 209 patients. 75% of them have high cholesterol, and 63% have high blood pressure. Their average risk score is 1.01, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Kassir's median patient age at 66, with 79% women.
Dr. Kassir's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Kassir's Medicare patients by sex, 2024
- Women27675%
- Men9325%
Chronic conditions among Dr. Kassir's Medicare patients, 2024
- High cholesterol75%
- High blood pressure63%
- Arthritis38%
- Osteoporosis25%
- Ischemic heart disease22%
- Chronic kidney disease20%
- Diabetes20%
- Cancer19%
Share of Medicare patients with each condition. A patient can have several.
Dr. Kassir's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women79%
- Men21%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Jennifer Lee Kassir wrote 4,080 Medicare Part D claims in 2024
In 2024, Dr. Kassir wrote 4,080 Medicare Part D claims for 497 patients. 93% of them were for generic drugs. CMS names the drug for 3,600 of them, across 68 drugs with 11 or more claims each, at $127,826 in total drug cost. In 2023, CMS named 3,167 claims across 63 drugs.
Dr. Kassir's Part D claims by kind of drug, 2024
- Generic3,778 claims93%
- Brand-name291 claims7%
- Other11 claims0%
Dr. Kassir'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. Kassir's Part D claims, 2024
- Opioids0%13 of 4,080 claims
- Antibiotics2%87 of 4,080 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: 3,1672024: 3,60014%
Drugs named by CMS: 68 in 2024, 63 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. Jennifer Lee Kassir offers telehealth to Medicare patients
Dr. Kassir accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Kassir as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Jennifer Lee Kassir received $41 in industry payments from 2023 to 2025
CMS Open Payments shows 2 general payments to Dr. Kassir from 2 drug and device companies from 2023 to 2025. Food and beverage make up the largest share, 100% of the total. Eli Lilly and Company paid the most, $24.
General payments to Dr. Kassir by program year, 2023 to 2025
Companies that paid Dr. Kassir the most, 2023 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Jennifer Lee Kassir'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) |
| 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. Jennifer Lee Kassir
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. Jennifer Lee Kassir's NPI number?
Dr. Jennifer Lee Kassir's NPI number is 1528214715. It was assigned on August 7, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Jennifer Lee Kassir?
Dr. Jennifer Lee Kassir is an internist in Lisle, Illinois. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Jennifer Lee Kassir practice?
Dr. Kassir practices at 430 Warrenville Rd., Ste. 110, Lisle, IL 60532. Dr. Kassir's primary practice is Duly Health and Care Lisle in Lisle, Illinois. Dmand AI also links Dr. Kassir to 1 hospital, 2 group practices and clinics, 1 home health agency, 1 therapy and rehab clinic and 1 medical group.
What is Dr. Jennifer Lee Kassir's office phone number?
The practice phone on file for Dr. Kassir is (630) 469-9200.
What is Dr. Jennifer Lee Kassir's medical license number?
Dr. Kassir holds Illinois license 036.120590.
Which hospitals is Dr. Jennifer Lee Kassir affiliated with?
Dr. Kassir is affiliated with Loyola University Medical Center. Dmand AI links Dr. Kassir to 1 more hospital.
What medical group is Dr. Jennifer Lee Kassir part of?
Dr. Kassir is linked to Northwestern Medicine Regional Medical Group. Dmand AI links Dr. Kassir to 1 more medical group.
Does Dr. Jennifer Lee Kassir accept Medicare?
Yes. CMS data shows Dr. Kassir billed Medicare for 3,198 services in 2024, and Dr. Kassir accepts Medicare assignment.
Does Dr. Jennifer Lee Kassir offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Kassir as offering telehealth services.
How many Medicare patients does Dr. Jennifer Lee Kassir see?
CMS counts 369 Medicare patients who saw Dr. Kassir in 2024, with an average age of 74.
Show 4 more questionsShow fewer questions
What services does Dr. Jennifer Lee Kassir bill to Medicare?
In 2024, Dr. Kassir's most billed Medicare services were office visit, established patient (99214), surgery: heart and blood vessels (36415) and medicare service (G0439).
What drugs does Dr. Jennifer Lee Kassir prescribe most?
In 2024 Medicare Part D data, Dr. Kassir's most prescribed drugs by claims were Atorvastatin Calcium, Losartan Potassium and Levothyroxine Sodium.
Has Dr. Jennifer Lee Kassir received payments from drug or device companies?
CMS Open Payments shows $41 in general payments to Dr. Kassir from 2 companies from 2023 to 2025. The largest total came from Eli Lilly and Company.
How long has Dr. Jennifer Lee Kassir been practicing?
Dr. Kassir graduated from medical school in 2005, 21 years ago.
Selling to internal medicine practices?
See internists in Illinois 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