Dr. Titus Chang, MD
- Medicare services, 2024
- 1,087
- Medicare patients, 2024
- 171
- Part D claims, 2024
- 1,750
- Hospital affiliations
- 1
- Industry payments
- $88
- Practice address
- 2285 Sequoia Dr, Aurora, IL 60506
- Practice phone
- Call (630) 264-8926
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
ACL Lab - Patient Service Center - Aurora (Sequoia Dr)
Clinical Lab - Full Service · Aurora, Illinois
Find Dr. Chang'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. Titus Chang is an allergist and immunologist in Aurora, Illinois
Dr. Chang practices at ACL Lab - Patient Service Center - Aurora (Sequoia Dr) in Aurora, Illinois.
Dr. Chang's NPI, 1316988850, was assigned on June 8, 2006. Dr. Chang graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 2000. Dr. Chang holds Illinois license 036-109430.
- NPI
- 1316988850NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9335137702
- NPI enumeration date
- June 8, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (630) 264-8926
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 52
- Medical school graduation
- 2000
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Titus Chang practices at ACL Lab - Patient Service Center - Aurora (Sequoia Dr) in Aurora, Illinois
Dr. Chang's primary practice is ACL Lab - Patient Service Center - Aurora (Sequoia Dr), at 2285 Sequoia Dr, Aurora, IL 60506. The practice phone is (630) 264-8926.
- ACL Lab - Patient Service Center - Aurora (Sequoia Dr)2285 Sequoia Dr, Aurora, IL 60506Phone(630) 264-8926
Source: Dmand AI Affiliation Data
Dr. Titus Chang is affiliated with 4 sites of care and 2 medical groups
Dr. Chang's primary practice is ACL Lab - Patient Service Center - Aurora (Sequoia Dr) in Aurora, Illinois. Dr. Chang is also affiliated with Advocate Good Samaritan Hospital. The medical group on file is Dreyer Medical Clinic (Advocate Medical Group). Dmand AI also links Dr. Chang to 2 more group practices and clinics and 1 medical group, each named with a free account. Dr. Chang's employer is on file too: a clinical lab.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Titus Chang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chang practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| ACL Lab - Patient Service Center - Aurora (Sequoia Dr) | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Titus Chang is one of 145 allergists and immunologists in Illinois
Allergy and immunology is Dr. Chang's primary specialty in the NPI Registry, under taxonomy code 207K00000X. Dmand AI has Dr. Chang's licenses on file in 2 states: Illinois and Wisconsin.
Specialties and state licenses
- Allergy and immunology, IllinoisPrimary
- Pediatric allergy/immunology, Wisconsin
Allergists and immunologists near Dr. Chang
Counts of allergists and immunologists 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. Titus Chang billed Medicare for 1,087 services in 2024
CMS data shows 1,087 Medicare services from Dr. Chang across 8 procedure codes in 2024, for 171 Medicare patients. Medicare paid $34,626 for them. Every service was in an office.
Dr. Chang's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 9442024: 62634%
- Office and hospital visits
- 2023: 2562024: 2685%
- Other services
- 2023: 02024: 113
- Surgery
- 2023: 942024: 8015%
Dr. Chang compared with the Illinois median for allergists and immunologists, 2024
- Dr. Chang
- Illinois median
- Medicare services
- 1,087vs 90520% above
- Medicare patients
- 171vs 11647% above
- Part D claims
- 1,576vs 2466.4 times
Medians across 130 allergists and immunologists in Illinois with Dmand AI profiles that report each measure.
Dr. Chang'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. Chang and other allergists and immunologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Titus Chang treated 171 Medicare patients in 2024, average age 74
CMS counts 171 Medicare patients who saw Dr. Chang in 2024. The largest group is 75 to 84, with 78 patients. 75% of them have high cholesterol, and 71% have high blood pressure. 9% are also on Medicaid. Their average risk score is 1.42, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chang's median patient age at 27, with 52% women.
Dr. Chang's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Chang's Medicare patients by sex, 2024
- Women10260%
- Men6940%
Chronic conditions among Dr. Chang's Medicare patients, 2024
- High cholesterol75%
- High blood pressure71%
- Arthritis56%
- Asthma47%
- Ischemic heart disease36%
- Diabetes29%
- COPD27%
- Anxiety26%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chang's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 27
Patient panel by sex, all payers
- Women52%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Titus Chang wrote 1,750 Medicare Part D claims in 2024
In 2024, Dr. Chang wrote 1,750 Medicare Part D claims for 265 patients. 63% of them were for generic drugs. CMS names the drug for 1,576 of them, across 29 drugs with 11 or more claims each, at $838,019 in total drug cost. In 2023, CMS named 1,603 claims across 29 drugs.
Dr. Chang's Part D claims by kind of drug, 2024
- Generic1,095 claims63%
- Brand-name655 claims37%
Dr. Chang'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. Chang's Part D claims, 2024
- Antibiotics3%59 of 1,750 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: 1,6032024: 1,5762%
Drugs named by CMS: 29 in 2024, 29 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. Titus Chang offers telehealth to Medicare patients
Dr. Chang accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Chang as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Titus Chang received $88 in industry payments from 2018 to 2025
CMS Open Payments shows 6 general payments to Dr. Chang from 3 drug and device companies from 2018 to 2025. Education make up the largest share, 100% of the total. Sanofi and Genzyme US Companies paid the most, $36.
General payments to Dr. Chang by program year, 2018 to 2025
Companies that paid Dr. Chang the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Titus Chang graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb)
Dr. Chang graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 2000.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Titus Chang'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. Titus Chang
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. Titus Chang's NPI number?
Dr. Titus Chang's NPI number is 1316988850. It was assigned on June 8, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Titus Chang?
Dr. Titus Chang is an allergist and immunologist in Aurora, Illinois. The primary specialty in the NPI Registry is Allergy & Immunology Physician (taxonomy code 207K00000X).
Where does Dr. Titus Chang practice?
Dr. Chang practices at 2285 Sequoia Dr, Aurora, IL 60506. Dr. Chang's primary practice is ACL Lab - Patient Service Center - Aurora (Sequoia Dr) in Aurora, Illinois. Dmand AI also links Dr. Chang to 2 group practices and clinics and 1 medical group.
What is Dr. Titus Chang's office phone number?
The practice phone on file for Dr. Chang is (630) 264-8926.
What is Dr. Titus Chang's medical license number?
Dr. Chang holds Illinois license 036-109430, one of the licenses on file in 2 states.
Which states has Dr. Titus Chang been licensed in?
Dmand AI has state licenses on file for Dr. Chang in Illinois and Wisconsin.
Which hospitals is Dr. Titus Chang affiliated with?
Dr. Chang is affiliated with Advocate Good Samaritan Hospital.
What medical group is Dr. Titus Chang part of?
Dr. Chang is linked to Dreyer Medical Clinic (Advocate Medical Group). Dmand AI links Dr. Chang to 1 more medical group.
Does Dr. Titus Chang accept Medicare?
Yes. CMS data shows Dr. Chang billed Medicare for 1,087 services in 2024, and Dr. Chang accepts Medicare assignment.
Does Dr. Titus Chang offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chang as offering telehealth services.
Show 6 more questionsShow fewer questions
How many Medicare patients does Dr. Titus Chang see?
CMS counts 171 Medicare patients who saw Dr. Chang in 2024, with an average age of 74.
What services does Dr. Titus Chang bill to Medicare?
In 2024, Dr. Chang's most billed Medicare services were allergy test or treatment (95004), office visit, established patient (99214) and medicare service (G2211).
Where did Dr. Titus Chang go to medical school?
Dr. Chang graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 2000.
What drugs does Dr. Titus Chang prescribe most?
In 2024 Medicare Part D data, Dr. Chang's most prescribed drugs by claims were Montelukast Sodium, Azelastine HCl and Prednisone.
Has Dr. Titus Chang received payments from drug or device companies?
CMS Open Payments shows $88 in general payments to Dr. Chang from 3 companies from 2018 to 2025. The largest total came from Sanofi and Genzyme US Companies.
How long has Dr. Titus Chang been practicing?
Dr. Chang graduated from medical school in 2000, 26 years ago.
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