Dr. James J. Herdegen, MD
- Medicare services, 2024
- 550
- Medicare patients, 2024
- 355
- Part D claims, 2024
- 68
- Hospital affiliations
- 3
- Industry payments
- $16,568
- Practice address
- 1653 West Congress Parkway, Chicago, IL 60612
- Practice phone
- Call (312) 942-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Herdegen'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. James J. Herdegen is an internist in Chicago, Illinois
Dr. Herdegen practices at Rush University Medical Center in Chicago, Illinois, part of Rush System for Health.
Dr. Herdegen's NPI, 1184737793, was assigned on August 16, 2006. Dr. Herdegen graduated from University of Chicago, Pritzker School of Medicine in 1986. Dr. Herdegen holds Illinois license 036078423.
- NPI
- 1184737793NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0143212779
- NPI enumeration date
- August 16, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (312) 942-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. James J. Herdegen practices at Rush University Medical Center in Chicago, Illinois
Dr. Herdegen's primary practice is Rush University Medical Center, at 1653 West Congress Parkway, Chicago, IL 60612 in Cook County. The practice phone is (312) 942-5000.
- Rush University Medical Center1653 West Congress Parkway, Chicago, IL 60612 · Cook CountyPhone(312) 942-5000
Source: Dmand AI Affiliation Data
Dr. James J. Herdegen is affiliated with 4 sites of care and 4 medical groups
Dr. Herdegen's primary practice is Rush University Medical Center in Chicago, Illinois, part of Rush System for Health. Dr. Herdegen is also affiliated with University of Illinois Hospital. The medical group on file is Rush University Internists. Dmand AI also links Dr. Herdegen to 1 more hospital, 3 medical groups and 1 group practice or clinic, 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. James J. Herdegen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Herdegen practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Rush University Medical Center | Available with a free account |
| +3 more sites and 3 medical groups | 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 Rush System for Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. James J. Herdegen is one of 5,652 internists in Illinois
Internal medicine is Dr. Herdegen's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Herdegen is licensed in Illinois.
Specialties and state licenses
- Internal medicine, IllinoisPrimary
Internists near Dr. Herdegen
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. James J. Herdegen billed Medicare for 550 services in 2024
CMS data shows 550 Medicare services from Dr. Herdegen across 7 procedure codes in 2024, for 355 Medicare patients. Medicare paid $33,785 for them.
Dr. Herdegen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3152024: 25021%
- Other services
- 2023: 02024: 165
- Tests and treatments
- 2023: 1712024: 13521%
Where Dr. Herdegen's Medicare services took place, 2024
- In an office7013%
- In a facility48087%
Dr. Herdegen compared with the Illinois median for internists, 2024
- Dr. Herdegen
- Illinois median
- Medicare services
- 550vs 566Close to median
- Medicare patients
- 355vs 20871% above
- Part D claims
- 31vs 28489% below
Medians across 5,192 internists in Illinois with Dmand AI profiles that report each measure.
Dr. Herdegen'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. Herdegen?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Herdegen and other internists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. James J. Herdegen treated 355 Medicare patients in 2024, average age 70
CMS counts 355 Medicare patients who saw Dr. Herdegen in 2024. The largest group is 65 to 74, with 177 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 34% are also on Medicaid. Their average risk score is 1.65, 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. Herdegen's median patient age at 56, with 51% women.
Dr. Herdegen's Medicare patients by age, 2024
Dr. Herdegen's Medicare patients by sex, 2024
- Women20257%
- Men15343%
Chronic conditions among Dr. Herdegen's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis63%
- Ischemic heart disease39%
- Diabetes37%
- Mood disorders31%
- Depression28%
- Heart failure28%
Share of Medicare patients with each condition. A patient can have several.
Dr. Herdegen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 56
Patient panel by sex, all payers
- Women51%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. James J. Herdegen wrote 68 Medicare Part D claims in 2024
In 2024, Dr. Herdegen wrote 68 Medicare Part D claims for 20 patients. 97% of them were for generic drugs. CMS names the drug for 31 of them, across 1 drug with 11 or more claims each, at $228 in total drug cost. In 2023, CMS named 36 claims across 2 drugs.
Dr. Herdegen's Part D claims by kind of drug, 2024
- Generic66 claims97%
- Brand-name and other2 claims3%
Dr. Herdegen'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: 362024: 3114%
Drugs named by CMS: 1 in 2024, 2 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. James J. Herdegen offers telehealth to Medicare patients
Dr. Herdegen accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Herdegen 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. James J. Herdegen received $16,568 in industry payments from 2016 to 2025
CMS Open Payments shows 36 general payments to Dr. Herdegen from 11 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 78% of the total. Boehringer Ingelheim USA, Inc. paid the most, $6,696.
General payments to Dr. Herdegen by program year, 2016 to 2025
General payments to Dr. Herdegen by kind, 2016 to 2025
- Consulting fees$12,86578%
- Speaker and faculty fees$1,67510%
- Travel and lodging$8305%
- Food and beverage$7525%
- Other$4463%
Companies that paid Dr. Herdegen 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. James J. Herdegen graduated from University of Chicago, Pritzker School of Medicine
Dr. Herdegen graduated from University of Chicago, Pritzker School of Medicine in 1986.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. James J. Herdegen'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. James J. Herdegen
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. James J. Herdegen's NPI number?
Dr. James J. Herdegen's NPI number is 1184737793. It was assigned on August 16, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. James J. Herdegen?
Dr. James J. Herdegen is an internist in Chicago, Illinois. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. James J. Herdegen practice?
Dr. Herdegen practices at 1653 West Congress Parkway, Chicago, IL 60612. Dr. Herdegen's primary practice is Rush University Medical Center in Chicago, Illinois, part of Rush System for Health. Dmand AI also links Dr. Herdegen to 1 hospital, 3 medical groups and 1 group practice or clinic.
What is Dr. James J. Herdegen's office phone number?
The practice phone on file for Dr. Herdegen is (312) 942-5000.
What is Dr. James J. Herdegen's medical license number?
Dr. Herdegen holds Illinois license 036078423.
Which hospitals is Dr. James J. Herdegen affiliated with?
Dr. Herdegen practices at Rush University Medical Center in Chicago, Illinois. Dr. Herdegen is also affiliated with University of Illinois Hospital. Dmand AI links Dr. Herdegen to 1 more hospital.
What medical group is Dr. James J. Herdegen part of?
Dr. Herdegen is linked to Rush University Internists. Dmand AI links Dr. Herdegen to 3 more medical groups.
Does Dr. James J. Herdegen accept Medicare?
Yes. CMS data shows Dr. Herdegen billed Medicare for 550 services in 2024, and Dr. Herdegen accepts Medicare assignment.
Does Dr. James J. Herdegen offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Herdegen as offering telehealth services.
How many Medicare patients does Dr. James J. Herdegen see?
CMS counts 355 Medicare patients who saw Dr. Herdegen in 2024, with an average age of 70.
Show 5 more questionsShow fewer questions
What services does Dr. James J. Herdegen bill to Medicare?
In 2024, Dr. Herdegen's most billed Medicare services were medicare service (G2211), office visit, established patient (99214) and office visit, new patient (99204).
Where did Dr. James J. Herdegen go to medical school?
Dr. Herdegen graduated from University of Chicago, Pritzker School of Medicine in 1986.
What drugs does Dr. James J. Herdegen prescribe most?
In 2024 Medicare Part D data, Dr. Herdegen's most prescribed drugs by claims were Gabapentin.
Has Dr. James J. Herdegen received payments from drug or device companies?
CMS Open Payments shows $16,568 in general payments to Dr. Herdegen from 11 companies from 2016 to 2025. The largest total came from Boehringer Ingelheim USA, Inc.
How long has Dr. James J. Herdegen been practicing?
Dr. Herdegen graduated from medical school in 1986, 40 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