Dr. Leslie Dalaza Mattson, MD
- Medicare services, 2024
- 1,315
- Medicare patients, 2024
- 384
- Part D claims, 2024
- 694
- Hospital affiliations
- 2
- Industry payments
- $41
- Practice address
- 801 South Washington, Naperville, IL 60540
- Practice phone
- Call (630) 527-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Mattson's professional email, personal email and mobile number
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Dr. Leslie Dalaza Mattson is an internist in Naperville, Illinois
Dr. Mattson practices at Edward Hospital in Naperville, Illinois, part of Endeavor Health.
Dr. Mattson's NPI, 1487975181, was assigned on June 16, 2010. Dr. Mattson graduated from Loyola University of Chicago, Stritch School of Medicine in 2010. Dr. Mattson holds Illinois license 036131651.
- NPI
- 1487975181NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2668614959
- NPI enumeration date
- June 16, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (630) 527-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 42
- Medical school graduation
- 2010
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Leslie Dalaza Mattson practices at Edward Hospital in Naperville, Illinois
Dr. Mattson's primary practice is Edward Hospital, at 801 South Washington, Naperville, IL 60540 in Du Page County. The practice phone is (630) 527-3000.
- Edward Hospital801 South Washington, Naperville, IL 60540 · Du Page CountyPhone(630) 527-3000
Source: Dmand AI Affiliation Data
Dr. Leslie Dalaza Mattson is affiliated with 4 sites of care and 1 medical group
Dr. Mattson's primary practice is Edward Hospital in Naperville, Illinois, part of Endeavor Health. Dr. Mattson is also affiliated with Ascension Saint Alexius. The medical group on file is DuPage Medical Group. Dmand AI also links Dr. Mattson to 1 more group practice or clinic and 1 home health agency, 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. Leslie Dalaza Mattson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mattson practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Edward Hospital | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Leslie Dalaza Mattson is one of 5,652 internists in Illinois
Internal medicine is Dr. Mattson's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Mattson is licensed in Illinois.
Specialties and state licenses
- Internal medicine, IllinoisPrimary
Internists near Dr. Mattson
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. Leslie Dalaza Mattson billed Medicare for 1,315 services in 2024
CMS data shows 1,315 Medicare services from Dr. Mattson across 21 procedure codes in 2024, for 384 Medicare patients. Medicare paid $83,926 for them.
Dr. Mattson's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 9392024: 84110%
- Lab and pathology
- 2023: 02024: 202
- Other services
- 2023: 02024: 152
- Surgery
- 2023: 02024: 87
- Tests and treatments
- 2023: 02024: 33
Where Dr. Mattson's Medicare services took place, 2024
- In an office70754%
- In a facility60846%
Dr. Mattson compared with the Illinois median for internists, 2024
- Dr. Mattson
- Illinois median
- Medicare services
- 1,315vs 5662.3 times
- Medicare patients
- 384vs 20885% above
- Part D claims
- 319vs 28412% above
Medians across 5,192 internists in Illinois with Dmand AI profiles that report each measure.
Dr. Mattson'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. Mattson and other internists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Leslie Dalaza Mattson treated 384 Medicare patients in 2024, average age 76
CMS counts 384 Medicare patients who saw Dr. Mattson in 2024. The largest group is 65 to 74, with 153 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 8% are also on Medicaid. Their average risk score is 1.99, 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. Mattson's median patient age at 68, with 66% women.
Dr. Mattson's Medicare patients by age, 2024
Dr. Mattson's Medicare patients by sex, 2024
- Women22659%
- Men15841%
Chronic conditions among Dr. Mattson's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis53%
- Diabetes42%
- Ischemic heart disease41%
- Chronic kidney disease36%
- Heart failure34%
- Mood disorders32%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mattson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women66%
- Men33%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Leslie Dalaza Mattson wrote 694 Medicare Part D claims in 2024
In 2024, Dr. Mattson wrote 694 Medicare Part D claims for 311 patients. 87% of them were for generic drugs. CMS names the drug for 319 of them, across 19 drugs with 11 or more claims each, at $4,595 in total drug cost. In 2023, CMS named 12 claims across 1 drug.
Dr. Mattson's Part D claims by kind of drug, 2024
- Generic601 claims87%
- Brand-name and other93 claims13%
Dr. Mattson'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. Mattson's Part D claims, 2024
- Opioids3%19 of 694 claims
- Antibiotics13%89 of 694 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: 122024: 3192558%
Drugs named by CMS: 19 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
Dr. Leslie Dalaza Mattson offers telehealth to Medicare patients
Dr. Mattson accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Mattson as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Leslie Dalaza Mattson received $41 in industry payments from 2022 to 2024
CMS Open Payments shows 2 general payments to Dr. Mattson from 1 drug or device company from 2022 to 2024. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $41.
General payments to Dr. Mattson by program year, 2022 to 2024
Companies that paid Dr. Mattson the most, 2022 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Leslie Dalaza Mattson graduated from Loyola University of Chicago, Stritch School of Medicine
Dr. Mattson graduated from Loyola University of Chicago, Stritch School of Medicine in 2010.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Leslie Dalaza Mattson'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. Leslie Dalaza Mattson
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. Leslie Dalaza Mattson's NPI number?
Dr. Leslie Dalaza Mattson's NPI number is 1487975181. It was assigned on June 16, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. Leslie Dalaza Mattson?
Dr. Leslie Dalaza Mattson is an internist in Naperville, Illinois. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Leslie Dalaza Mattson practice?
Dr. Mattson practices at 801 South Washington, Naperville, IL 60540. Dr. Mattson's primary practice is Edward Hospital in Naperville, Illinois, part of Endeavor Health. Dmand AI also links Dr. Mattson to 1 group practice or clinic and 1 home health agency.
What is Dr. Leslie Dalaza Mattson's office phone number?
The practice phone on file for Dr. Mattson is (630) 527-3000.
What is Dr. Leslie Dalaza Mattson's medical license number?
Dr. Mattson holds Illinois license 036131651.
Which hospitals is Dr. Leslie Dalaza Mattson affiliated with?
Dr. Mattson practices at Edward Hospital in Naperville, Illinois. Dr. Mattson is also affiliated with Ascension Saint Alexius.
What medical group is Dr. Leslie Dalaza Mattson part of?
Dr. Mattson is linked to DuPage Medical Group.
Does Dr. Leslie Dalaza Mattson accept Medicare?
Yes. CMS data shows Dr. Mattson billed Medicare for 1,315 services in 2024, and Dr. Mattson accepts Medicare assignment.
Does Dr. Leslie Dalaza Mattson offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Mattson as offering telehealth services.
How many Medicare patients does Dr. Leslie Dalaza Mattson see?
CMS counts 384 Medicare patients who saw Dr. Mattson in 2024, with an average age of 76.
Show 5 more questionsShow fewer questions
What services does Dr. Leslie Dalaza Mattson bill to Medicare?
In 2024, Dr. Mattson's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99233) and office visit, established patient (99214).
Where did Dr. Leslie Dalaza Mattson go to medical school?
Dr. Mattson graduated from Loyola University of Chicago, Stritch School of Medicine in 2010.
What drugs does Dr. Leslie Dalaza Mattson prescribe most?
In 2024 Medicare Part D data, Dr. Mattson's most prescribed drugs by claims were Amlodipine Besylate, Atorvastatin Calcium and Pantoprazole Sodium.
Has Dr. Leslie Dalaza Mattson received payments from drug or device companies?
CMS Open Payments shows $41 in general payments to Dr. Mattson from 1 company from 2022 to 2024. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Leslie Dalaza Mattson been practicing?
Dr. Mattson graduated from medical school in 2010, 16 years ago.
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