Dr. Douglas L. Duvel, MD
- Medicare services, 2024
- 1,235
- Medicare patients, 2024
- 179
- Part D claims, 2024
- 1,993
- Hospital affiliations
- 4
- Industry payments
- $3,813
- Practice address
- 676 N St Clair St, Chicago, IL 60611
- Practice phone
- Call (312) 944-0688
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Internal Medicine Associates
Chicago, Illinois
Find Dr. Duvel'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. Douglas L. Duvel is an internist in Chicago, Illinois
Dr. Duvel practices at Internal Medicine Associates in Chicago, Illinois.
Dr. Duvel's NPI, 1275699811, was assigned on December 28, 2006. Dr. Duvel graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1991. Dr. Duvel holds Illinois license 036088769.
- NPI
- 1275699811NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7810180353
- NPI enumeration date
- December 28, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (312) 944-0688
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 61
- Medical school graduation
- 1991
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Douglas L. Duvel practices at Internal Medicine Associates in Chicago, Illinois
Dr. Duvel's primary practice is Internal Medicine Associates, at 676 N St Clair St, Chicago, IL 60611 in Cook County. The practice phone is (312) 944-0688.
- Internal Medicine Associates676 N St Clair St, Chicago, IL 60611 · Cook CountyPhone(312) 944-0688
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Douglas L. Duvel is affiliated with 6 sites of care and 1 medical group
Dr. Duvel's primary practice is Internal Medicine Associates in Chicago, Illinois. Dr. Duvel is also affiliated with Northwestern Memorial Hospital. The medical group on file is Internal Medicine Associates. Dmand AI also links Dr. Duvel to 3 more hospitals and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Douglas L. Duvel's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Duvel practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Internal Medicine Associates | Available with a free account |
| +5 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Douglas L. Duvel is one of 5,652 internists in Illinois
Internal medicine is Dr. Duvel's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Duvel is licensed in Illinois.
Specialties and state licenses
- Internal medicine, IllinoisPrimary
Internists near Dr. Duvel
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. Douglas L. Duvel billed Medicare for 1,235 services in 2024
CMS data shows 1,235 Medicare services from Dr. Duvel across 16 procedure codes in 2024, for 179 Medicare patients. Medicare paid $63,960 for them. Every service was in an office.
Dr. Duvel's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Other services
- 2023: 4362024: 61942%
- Office and hospital visits
- 2023: 4222024: 4161%
- Lab and pathology
- 2023: 992024: 1045%
- Tests and treatments
- 2023: 492024: 9696%
Dr. Duvel compared with the Illinois median for internists, 2024
- Dr. Duvel
- Illinois median
- Medicare services
- 1,235vs 5662.2 times
- Medicare patients
- 179vs 20814% below
- Part D claims
- 1,570vs 2845.5 times
Medians across 5,192 internists in Illinois with Dmand AI profiles that report each measure.
Dr. Duvel'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Duvel and other internists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Douglas L. Duvel treated 179 Medicare patients in 2024, average age 77
CMS counts 179 Medicare patients who saw Dr. Duvel in 2024. The largest group is 65 to 74, with 79 patients. 75% of them have high cholesterol, and 66% have high blood pressure. Their average risk score is 1.03, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Duvel's median patient age at 69, with 32% women.
Dr. Duvel's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Duvel's Medicare patients by sex, 2024
- Women6838%
- Men11162%
Chronic conditions among Dr. Duvel's Medicare patients, 2024
- High cholesterol75%
- High blood pressure66%
- Arthritis40%
- Ischemic heart disease28%
- Cancer21%
- Chronic kidney disease16%
- Mood disorders16%
- Diabetes15%
Share of Medicare patients with each condition. A patient can have several.
Dr. Duvel's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women32%
- Men68%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Douglas L. Duvel wrote 1,993 Medicare Part D claims in 2024
In 2024, Dr. Duvel wrote 1,993 Medicare Part D claims for 244 patients. 87% of them were for generic drugs. CMS names the drug for 1,570 of them, across 43 drugs with 11 or more claims each, at $109,471 in total drug cost. In 2023, CMS named 1,494 claims across 42 drugs.
Dr. Duvel's Part D claims by kind of drug, 2024
- Generic1,735 claims87%
- Brand-name238 claims12%
- Other20 claims1%
Dr. Duvel'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. Duvel's Part D claims, 2024
- Opioids2%48 of 1,993 claims
- Antibiotics1%25 of 1,993 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: 1,4942024: 1,5705%
Drugs named by CMS: 43 in 2024, 42 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. Douglas L. Duvel offers telehealth to Medicare patients
Dr. Duvel accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Duvel as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Douglas L. Duvel received $3,813 in industry payments from 2016 to 2025
CMS Open Payments shows 201 general payments to Dr. Duvel from 31 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Novo Nordisk Inc paid the most, $587.
General payments to Dr. Duvel by program year, 2016 to 2025
General payments to Dr. Duvel by kind, 2016 to 2025
- Food and beverage$3,799100%
- Education$150%
Companies that paid Dr. Duvel 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. Douglas L. Duvel graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb)
Dr. Duvel graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1991.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Douglas L. Duvel'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 Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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. Douglas L. Duvel
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. Douglas L. Duvel's NPI number?
Dr. Douglas L. Duvel's NPI number is 1275699811. It was assigned on December 28, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Douglas L. Duvel?
Dr. Douglas L. Duvel is an internist in Chicago, Illinois. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Douglas L. Duvel practice?
Dr. Duvel practices at 676 N St Clair St, Chicago, IL 60611. Dr. Duvel's primary practice is Internal Medicine Associates in Chicago, Illinois. Dmand AI also links Dr. Duvel to 3 hospitals and 1 group practice or clinic.
What is Dr. Douglas L. Duvel's office phone number?
The practice phone on file for Dr. Duvel is (312) 944-0688.
What is Dr. Douglas L. Duvel's medical license number?
Dr. Duvel holds Illinois license 036088769.
Which hospitals is Dr. Douglas L. Duvel affiliated with?
Dr. Duvel is affiliated with Northwestern Memorial Hospital. Dmand AI links Dr. Duvel to 3 more hospitals.
What medical group is Dr. Douglas L. Duvel part of?
Dr. Duvel is linked to Internal Medicine Associates.
Does Dr. Douglas L. Duvel accept Medicare?
Yes. CMS data shows Dr. Duvel billed Medicare for 1,235 services in 2024, and Dr. Duvel accepts Medicare assignment.
Does Dr. Douglas L. Duvel offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Duvel as offering telehealth services.
How many Medicare patients does Dr. Douglas L. Duvel see?
CMS counts 179 Medicare patients who saw Dr. Duvel in 2024, with an average age of 77.
Show 5 more questionsShow fewer questions
What services does Dr. Douglas L. Duvel bill to Medicare?
In 2024, Dr. Duvel's most billed Medicare services were office visit, established patient (99213), medicare service (G2211) and office visit, established patient (99214).
Where did Dr. Douglas L. Duvel go to medical school?
Dr. Duvel graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1991.
What drugs does Dr. Douglas L. Duvel prescribe most?
In 2024 Medicare Part D data, Dr. Duvel's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Lisinopril.
Has Dr. Douglas L. Duvel received payments from drug or device companies?
CMS Open Payments shows $3,813 in general payments to Dr. Duvel from 31 companies from 2016 to 2025. The largest total came from Novo Nordisk Inc.
How long has Dr. Douglas L. Duvel been practicing?
Dr. Duvel graduated from medical school in 1991, 35 years ago.
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