Dr. Donald Benjamin Lassus, MD
- Medicare services, 2024
- 24
- Medicare patients, 2024
- 32
- Part D claims, 2024
- 805
- Affiliated sites
- 3
- Medical groups
- 2
- Practice address
- 1656 West Chicago, Chicago, IL 60622
- Practice phone
- Call (312) 666-3488
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Erie Family Health Centers - Chicago
FQHC - Main Site · Chicago, Illinois
Find Dr. Lassus' professional email, personal email and mobile number
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Dr. Donald Benjamin Lassus is a family medicine physician in Chicago, Illinois
Dr. Lassus practices at Erie Family Health Centers - Chicago in Chicago, Illinois.
Dr. Lassus' NPI, 1124330055, was assigned on July 8, 2010. Dr. Lassus graduated from Baylor College of Medicine in 2010. Dr. Lassus holds Illinois license 036135721.
- NPI
- 1124330055NPI Registry (opens in a new tab)
- NPI enumeration date
- July 8, 2010
- NPI status
- Active
- Practice phone
- (312) 666-3488
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 42
- Medical school graduation
- 2010
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Donald Benjamin Lassus practices at 2 locations in Chicago, Illinois
Dr. Lassus' primary practice is Erie Family Health Centers - Chicago, at 1656 West Chicago, Chicago, IL 60622 in Cook County. The practice phone is (312) 666-3488. Dr. Lassus also practices at Erie Family Health Center, Inc, 1701 W Superior St, Chicago, IL 60622.
- Erie Family Health Centers - ChicagoPrimary1656 West Chicago, Chicago, IL 60622 · Cook CountyPhone(312) 666-3488
- Erie Family Health Center, Inc1701 W Superior St, Chicago, IL 60622 · Cook CountyPhone(312) 432-7394
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. Donald Benjamin Lassus is affiliated with 3 sites of care and 2 medical groups
Dr. Lassus' primary practice is Erie Family Health Centers - Chicago in Chicago, Illinois. The medical group on file is John H. Stroger, Jr. Hospital of Cook County. Dmand AI also links Dr. Lassus to 1 more community health center, 1 group practice or clinic and 1 medical group, each named with a free account. Dr. Lassus' employer is on file too: a community health center (fqhc).
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Donald Benjamin Lassus' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lassus practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Erie Family Health Centers - Chicago | 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. Donald Benjamin Lassus is one of 5,105 family medicine physicians in Illinois
Family medicine is Dr. Lassus' primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Lassus is licensed in Illinois.
Specialties and state licenses
- Family medicine, IllinoisPrimary
Family medicine physicians near Dr. Lassus
Counts of family medicine physicians 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. Donald Benjamin Lassus billed Medicare for 24 services in 2024
CMS data shows 24 Medicare services from Dr. Lassus across 2 procedure codes in 2024, for 32 Medicare patients. Medicare paid $2,052 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Lassus' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 02024: 24
- Lab and pathology
- 2023: 342024: 0100%
Dr. Lassus compared with the Illinois median for family medicine physicians, 2024
- Dr. Lassus
- Illinois median
- Medicare services
- 24vs 35693% below
- Medicare patients
- 32vs 16080% below
- Part D claims
- 496vs 61820% below
Medians across 5,015 family medicine physicians in Illinois with Dmand AI profiles that report each measure.
Dr. Lassus' 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. Donald Benjamin Lassus treated 32 Medicare patients in 2024, average age 75
CMS counts 32 Medicare patients who saw Dr. Lassus in 2024. The largest group is 75 to 84, with 14 patients. 75% of them have diabetes, and 75% have high blood pressure. 50% are also on Medicaid. Their average risk score is 2.80, 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. Lassus' median patient age at 44, with 45% women.
Dr. Lassus' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Lassus' Medicare patients by sex, 2024
- Women1856%
- Men1444%
Chronic conditions among Dr. Lassus' Medicare patients, 2024
- Diabetes75%
- High blood pressure75%
- High cholesterol75%
- Arthritis63%
- Heart failure63%
- Ischemic heart disease53%
- Mood disorders50%
- Anxiety47%
Share of Medicare patients with each condition. A patient can have several.
Dr. Lassus' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 44
Patient panel by sex, all payers
- Women45%
- Men55%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Donald Benjamin Lassus wrote 805 Medicare Part D claims in 2024
In 2024, Dr. Lassus wrote 805 Medicare Part D claims for 60 patients. 73% of them were for generic drugs. CMS names the drug for 496 of them, across 25 drugs with 11 or more claims each, at $86,830 in total drug cost. In 2023, CMS named 644 claims across 32 drugs.
Dr. Lassus' Part D claims by kind of drug, 2024
- Generic585 claims73%
- Brand-name198 claims25%
- Other22 claims3%
Dr. Lassus' 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. Lassus' Part D claims, 2024
- Opioids3%26 of 805 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: 6442024: 49623%
Drugs named by CMS: 25 in 2024, 32 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
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Dr. Donald Benjamin Lassus graduated from Baylor College of Medicine
Dr. Lassus graduated from Baylor College of Medicine in 2010.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Donald Benjamin Lassus'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 Affiliation DataDmand AI Practice 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) |
| 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. Donald Benjamin Lassus
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. Donald Benjamin Lassus' NPI number?
Dr. Donald Benjamin Lassus' NPI number is 1124330055. It was assigned on July 8, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. Donald Benjamin Lassus?
Dr. Donald Benjamin Lassus is a family medicine physician in Chicago, Illinois. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Donald Benjamin Lassus practice?
Dr. Lassus practices at 1656 West Chicago, Chicago, IL 60622. Dr. Lassus also practices at 1701 W Superior St, Chicago, IL 60622. Dr. Lassus' primary practice is Erie Family Health Centers - Chicago in Chicago, Illinois. Dmand AI also links Dr. Lassus to 1 community health center, 1 group practice or clinic and 1 medical group.
What is Dr. Donald Benjamin Lassus' office phone number?
The practice phone on file for Dr. Lassus is (312) 666-3488.
What is Dr. Donald Benjamin Lassus' medical license number?
Dr. Lassus holds Illinois license 036135721.
What medical group is Dr. Donald Benjamin Lassus part of?
Dr. Lassus is linked to John H. Stroger, Jr. Hospital of Cook County. Dmand AI links Dr. Lassus to 1 more medical group.
Does Dr. Donald Benjamin Lassus accept Medicare?
Yes. CMS data shows Dr. Lassus billed Medicare for 24 services in 2024.
How many Medicare patients does Dr. Donald Benjamin Lassus see?
CMS counts 32 Medicare patients who saw Dr. Lassus in 2024, with an average age of 75.
What services does Dr. Donald Benjamin Lassus bill to Medicare?
In 2024, Dr. Lassus' most billed Medicare services were hospital inpatient care (99238) and hospital inpatient care (99222).
Where did Dr. Donald Benjamin Lassus go to medical school?
Dr. Lassus graduated from Baylor College of Medicine in 2010.
What drugs does Dr. Donald Benjamin Lassus prescribe most?
In 2024 Medicare Part D data, Dr. Lassus' most prescribed drugs by claims were Atorvastatin Calcium, Metformin HCl and Jardiance.
How long has Dr. Donald Benjamin Lassus been practicing?
Dr. Lassus graduated from medical school in 2010, 16 years ago.
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