Dr. Robert Jen, MD
- Medicare services, 2024
- 613
- Medicare patients, 2024
- 154
- Part D claims, 2024
- 133
- Hospital affiliations
- 1
- Industry payments
- $17
- 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
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Dr. Robert Jen is an internist in Oak Lawn, Illinois
Dr. Jen practices at Advocate Christ Medical Center in Oak Lawn, Illinois, part of Advocate Health.
Dr. Jen's NPI, 1104169994, was assigned on April 1, 2013. Dr. Jen graduated from University of Cincinnati College of Medicine in 2013. Dr. Jen holds Illinois license 125.063485.
- NPI
- 1104169994NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6002117041
- NPI enumeration date
- April 1, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (708) 684-8000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Robert Jen practices at Advocate Christ Medical Center in Oak Lawn, Illinois
Dr. Jen'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. Robert Jen is affiliated with 3 sites of care and 2 medical groups
Dr. Jen's primary practice is Advocate Christ Medical Center in Oak Lawn, Illinois, part of Advocate Health. The medical group on file is Dreyer Medical Clinic (Advocate Medical Group). Dmand AI also links Dr. Jen to 1 more group practice or clinic, 1 hospice and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Robert Jen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Jen 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 sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Robert Jen is one of 5,652 internists in Illinois
Internal medicine is Dr. Jen's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Jen is board certified in internal medicine by the American Board of Internal Medicine. Dr. Jen is licensed in Illinois.
Specialties and state licenses
- Internal medicine, IllinoisPrimary
Internists near Dr. Jen
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. Robert Jen billed Medicare for 613 services in 2024
CMS data shows 613 Medicare services from Dr. Jen across 3 procedure codes in 2024, for 154 Medicare patients. Medicare paid $60,198 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Jen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 7562024: 61319%
Dr. Jen compared with the Illinois median for internists, 2024
- Dr. Jen
- Illinois median
- Medicare services
- 613vs 5668% above
- Medicare patients
- 154vs 20826% below
- Part D claims
- 15vs 28495% below
Medians across 5,192 internists in Illinois with Dmand AI profiles that report each measure.
Dr. Jen'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. Robert Jen treated 154 Medicare patients in 2024, average age 72
CMS counts 154 Medicare patients who saw Dr. Jen in 2024. The largest group is 65 to 74, with 56 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 45% are also on Medicaid. Their average risk score is 3.14, 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. Jen's median patient age at 76, with 57% women.
Dr. Jen's Medicare patients by age, 2024
Dr. Jen's Medicare patients by sex, 2024
- Women7951%
- Men7549%
Chronic conditions among Dr. Jen's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease66%
- Heart failure64%
- Diabetes63%
- Ischemic heart disease56%
- Arthritis53%
- Atrial fibrillation40%
Share of Medicare patients with each condition. A patient can have several.
Dr. Jen'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
- Women57%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Robert Jen wrote 133 Medicare Part D claims in 2024
In 2024, Dr. Jen wrote 133 Medicare Part D claims for 68 patients. 93% of them were for generic drugs. CMS names the drug for 15 of them, across 1 drug with 11 or more claims each, at $67 in total drug cost. In 2023, CMS named 11 claims across 1 drug.
Dr. Jen's Part D claims by kind of drug, 2024
- Generic124 claims93%
- Brand-name and other9 claims7%
Dr. Jen'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: 112024: 1536%
Drugs named by CMS: 1 in 2024, 1 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. Robert Jen takes part in Medicare
Dr. Jen 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. Robert Jen received $17 in industry payments in 2018
CMS Open Payments shows 1 general payment to Dr. Jen from 1 drug or device company in 2018. Food and beverage make up the largest share, 100% of the total. Shire North American Group Inc paid the most, $17.
Companies that paid Dr. Jen the most, 2018 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Robert Jen graduated from University of Cincinnati College of Medicine
Dr. Jen graduated from University of Cincinnati College of Medicine in 2013.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Sources for Dr. Robert Jen'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) |
| 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. Robert Jen
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. Robert Jen's NPI number?
Dr. Robert Jen's NPI number is 1104169994. It was assigned on April 1, 2013, and it is active in the NPI Registry.
What kind of doctor is Dr. Robert Jen?
Dr. Robert Jen is an internist in Oak Lawn, Illinois. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Robert Jen practice?
Dr. Jen practices at 4440 W 95th Street, Oak Lawn, IL 60453. Dr. Jen's primary practice is Advocate Christ Medical Center in Oak Lawn, Illinois, part of Advocate Health. Dmand AI also links Dr. Jen to 1 group practice or clinic, 1 hospice and 1 medical group.
What is Dr. Robert Jen's office phone number?
The practice phone on file for Dr. Jen is (708) 684-8000.
What is Dr. Robert Jen's medical license number?
Dr. Jen holds Illinois license 125.063485.
Which hospitals is Dr. Robert Jen affiliated with?
Dr. Jen practices at Advocate Christ Medical Center in Oak Lawn, Illinois.
What medical group is Dr. Robert Jen part of?
Dr. Jen is linked to Dreyer Medical Clinic (Advocate Medical Group). Dmand AI links Dr. Jen to 1 more medical group.
Does Dr. Robert Jen accept Medicare?
Yes. CMS data shows Dr. Jen billed Medicare for 613 services in 2024, and Dr. Jen accepts Medicare assignment.
How many Medicare patients does Dr. Robert Jen see?
CMS counts 154 Medicare patients who saw Dr. Jen in 2024, with an average age of 72.
Is Dr. Robert Jen board certified?
Yes. Dr. Jen is board certified in internal medicine by the American Board of Internal Medicine.
Show 5 more questionsShow fewer questions
What services does Dr. Robert Jen bill to Medicare?
In 2024, Dr. Jen's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99239) and hospital inpatient care (99223).
Where did Dr. Robert Jen go to medical school?
Dr. Jen graduated from University of Cincinnati College of Medicine in 2013.
What drugs does Dr. Robert Jen prescribe most?
In 2024 Medicare Part D data, Dr. Jen's most prescribed drugs by claims were Pantoprazole Sodium.
Has Dr. Robert Jen received payments from drug or device companies?
CMS Open Payments shows $17 in general payments to Dr. Jen from 1 company from 2018 to 2018. The largest total came from Shire North American Group Inc.
How long has Dr. Robert Jen been practicing?
Dr. Jen graduated from medical school in 2013, 13 years ago.
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