Dr. Justin MacMillan, DO
- Medicare services, 2024
- 527
- Medicare patients, 2024
- 315
- Part D claims, 2024
- 88
- Hospital affiliations
- 1
- Medical groups
- 2
- Practice address
- 1425 North Randall Road, Elgin, IL 60123
- Practice phone
- Call (847) 742-9800
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Justin MacMillan is an internist in Elgin, Illinois
Dr. MacMillan practices at Advocate Sherman Hospital in Elgin, Illinois, part of Advocate Health.
Dr. MacMillan's NPI, 1467080994, was assigned on March 30, 2020. Dr. MacMillan graduated from Midwestern University, Chicago College of Osteopathic Med in 2020. Dr. MacMillan holds Illinois license 036.162688.
- NPI
- 1467080994NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7214396597
- NPI enumeration date
- March 30, 2020
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (847) 742-9800
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 32
- Medical school graduation
- 2020
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Justin MacMillan practices at Advocate Sherman Hospital in Elgin, Illinois
Dr. MacMillan's primary practice is Advocate Sherman Hospital, at 1425 North Randall Road, Elgin, IL 60123 in Kane County. The practice phone is (847) 742-9800.
- Advocate Sherman Hospital1425 North Randall Road, Elgin, IL 60123 · Kane CountyPhone(847) 742-9800
Source: Dmand AI Affiliation Data
Dr. Justin MacMillan is affiliated with 3 sites of care and 2 medical groups
Dr. MacMillan's primary practice is Advocate Sherman Hospital in Elgin, Illinois, part of Advocate Health. The medical group on file is Dreyer Medical Clinic (Advocate Medical Group). Dmand AI also links Dr. MacMillan to 1 more group practice or clinic, 1 hospice and 1 medical group, 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. Justin MacMillan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. MacMillan practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Advocate Sherman Hospital | 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. Justin MacMillan is one of 5,652 internists in Illinois
Internal medicine is Dr. MacMillan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. MacMillan is licensed in Illinois.
Specialties and state licenses
- Internal medicine, IllinoisPrimary
Internists near Dr. MacMillan
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. Justin MacMillan billed Medicare for 527 services in 2024
CMS data shows 527 Medicare services from Dr. MacMillan across 7 procedure codes in 2024, for 315 Medicare patients. Medicare paid $59,906 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. MacMillan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1232024: 527328%
Dr. MacMillan compared with the Illinois median for internists, 2024
- Dr. MacMillan
- Illinois median
- Medicare services
- 527vs 5667% below
- Medicare patients
- 315vs 20851% above
- Part D claims
- 16vs 28494% below
Medians across 5,192 internists in Illinois with Dmand AI profiles that report each measure.
Dr. MacMillan'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Justin MacMillan treated 315 Medicare patients in 2024, average age 76
CMS counts 315 Medicare patients who saw Dr. MacMillan in 2024. The largest group is 75 to 84, with 113 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 21% are also on Medicaid. Their average risk score is 2.32, 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. MacMillan's median patient age at 74, with 48% women.
Dr. MacMillan's Medicare patients by age, 2024
Dr. MacMillan's Medicare patients by sex, 2024
- Women17756%
- Men13844%
Chronic conditions among Dr. MacMillan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis64%
- Chronic kidney disease47%
- Anxiety44%
- Ischemic heart disease44%
- Diabetes43%
- Heart failure43%
Share of Medicare patients with each condition. A patient can have several.
Dr. MacMillan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women48%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Justin MacMillan wrote 88 Medicare Part D claims in 2024
In 2024, Dr. MacMillan wrote 88 Medicare Part D claims for 47 patients. 92% of them were for generic drugs. CMS names the drug for 16 of them, across 1 drug with 11 or more claims each, at $143 in total drug cost. In 2022, CMS named 15 claims across 1 drug.
Dr. MacMillan's Part D claims by kind of drug, 2024
- Generic81 claims92%
- Brand-name and other7 claims8%
Dr. MacMillan's most prescribed drugs by claims, 2023
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. MacMillan's Part D claims, 2024
- Antibiotics25%22 of 88 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, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 152023: 167%
Drugs named by CMS: 1 in 2023, 1 in 2022.
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
How Dr. Justin MacMillan takes part in Medicare
Dr. MacMillan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Justin MacMillan graduated from Midwestern University, Chicago College of Osteopathic Med
Dr. MacMillan graduated from Midwestern University, Chicago College of Osteopathic Med in 2020.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Justin MacMillan'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) |
| 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. Justin MacMillan
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. Justin MacMillan's NPI number?
Dr. Justin MacMillan's NPI number is 1467080994. It was assigned on March 30, 2020, and it is active in the NPI Registry.
What kind of doctor is Dr. Justin MacMillan?
Dr. Justin MacMillan is an internist in Elgin, Illinois. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Justin MacMillan practice?
Dr. MacMillan practices at 1425 North Randall Road, Elgin, IL 60123. Dr. MacMillan's primary practice is Advocate Sherman Hospital in Elgin, Illinois, part of Advocate Health. Dmand AI also links Dr. MacMillan to 1 group practice or clinic, 1 hospice and 1 medical group.
What is Dr. Justin MacMillan's office phone number?
The practice phone on file for Dr. MacMillan is (847) 742-9800.
What is Dr. Justin MacMillan's medical license number?
Dr. MacMillan holds Illinois license 036.162688.
Which hospitals is Dr. Justin MacMillan affiliated with?
Dr. MacMillan practices at Advocate Sherman Hospital in Elgin, Illinois.
What medical group is Dr. Justin MacMillan part of?
Dr. MacMillan is linked to Dreyer Medical Clinic (Advocate Medical Group). Dmand AI links Dr. MacMillan to 1 more medical group.
Does Dr. Justin MacMillan accept Medicare?
Yes. CMS data shows Dr. MacMillan billed Medicare for 527 services in 2024, and Dr. MacMillan accepts Medicare assignment.
How many Medicare patients does Dr. Justin MacMillan see?
CMS counts 315 Medicare patients who saw Dr. MacMillan in 2024, with an average age of 76.
What services does Dr. Justin MacMillan bill to Medicare?
In 2024, Dr. MacMillan's most billed Medicare services were hospital inpatient care (99223), hospital inpatient care (99233) and hospital inpatient care (99239).
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Where did Dr. Justin MacMillan go to medical school?
Dr. MacMillan graduated from Midwestern University, Chicago College of Osteopathic Med in 2020.
What drugs does Dr. Justin MacMillan prescribe most?
In 2023 Medicare Part D data, Dr. MacMillan's most prescribed drugs by claims were Atorvastatin Calcium.
How long has Dr. Justin MacMillan been practicing?
Dr. MacMillan graduated from medical school in 2020, 6 years ago.
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