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Dr. Ross Howard McMillan, MD
NPI1578099578PAC ID8123421971
- Medicare services, 2022
- 111
- Part D claims, 2024
- 19
- Publications
- 3
- Hospital affiliations
- 2
- Industry payments
- $618
- Practice address
- 5841 S Maryland Ave, Chicago, IL 60637
- Practice phone
- Call (773) 702-1530
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
The University of Chicago Medical Center
Chicago, Illinois
Find Dr. McMillan'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. Ross Howard McMillan is an internist in Chicago, Illinois
Dr. McMillan practices at The University of Chicago Medical Center in Chicago, Illinois.
Dr. McMillan's NPI, 1578099578, was assigned on May 11, 2017. Dr. McMillan graduated from Johns Hopkins University School of Medicine in 2018. Dr. McMillan holds Illinois license 036156732.
NPI and contact details
- NPI
- 1578099578NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8123421971
- NPI enumeration date
- May 11, 2017
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (773) 702-1530
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 34
- Medical school graduation
- 2018
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ross Howard McMillan practices at The University of Chicago Medical Center in Chicago, Illinois
Dr. McMillan's primary practice is The University of Chicago Medical Center, at 5841 S Maryland Ave, Chicago, IL 60637 in Cook County. The practice phone is (773) 702-1530.
- The University of Chicago Medical Center5841 S Maryland Ave, Chicago, IL 60637 · Cook CountyPhone(773) 702-1530
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Ross Howard McMillan is affiliated with 3 sites of care and 2 medical groups
Dr. McMillan's primary practice is The University of Chicago Medical Center in Chicago, Illinois. Dr. McMillan is also affiliated with University of Chicago Medical Center. The medical group on file is UChicago Medicine Physicians. Dmand AI also links Dr. McMillan to 1 more hospital and 1 medical group, each named with a free account.
The University of Chicago Medical CenterPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Ross Howard McMillan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. McMillan practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| The University of Chicago Medical Center | 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. Ross Howard McMillan is one of 5,652 internists in Illinois
Internal medicine is Dr. McMillan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. McMillan is licensed in Illinois.
Specialties and state licenses
- Internal medicine, IllinoisPrimary
Internists near Dr. McMillan
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. Ross Howard McMillan billed Medicare for 111 services in 2022
CMS data shows 111 Medicare services from Dr. McMillan across 3 procedure codes in 2022. Medicare paid $8,031 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2022111
Paid by Medicare$8,031
Procedure codes3
Dr. McMillan's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 122022: 111825%
Dr. McMillan compared with the Illinois median for internists, 2022
- Dr. McMillan
- Illinois median
- Medicare services
- 111vs 56680% below
- Part D claims
- 162vs 28443% below
Medians across 5,192 internists in Illinois with Dmand AI profiles that report each measure.
Dr. McMillan's most billed Medicare procedure codes, 2022
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. McMillan and other internists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ross Howard McMillan's patients have a median age of 71
Across all payers, Dmand AI patient panel data puts Dr. McMillan's median patient age at 71, with 64% women.
Dr. McMillan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women64%
- Men36%
Source: Dmand AI Patient Panel Data
Dr. Ross Howard McMillan wrote 19 Medicare Part D claims in 2024
In 2024, Dr. McMillan wrote 19 Medicare Part D claims for 11 patients. 89% of them were for generic drugs. They cover 9 drugs, with $1,968 in total drug cost. In 2020, CMS named 306 claims across 15 drugs.
Part D claims, 202419
Drugs named by CMS9
Total drug cost$1,968
Part D patients11
Dr. McMillan's Part D claims by kind of drug, 2024
- Generic17 claims89%
- Brand-name and other2 claims11%
Dr. McMillan's most prescribed drugs by claims, 2021
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2020 to 2021
- 2020
- 2021
- Claims for drugs CMS names
- 2020: 3062021: 16247%
Drugs named by CMS: 9 in 2021, 15 in 2020.
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. Ross Howard McMillan ranks in the 65th percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare
Dr. McMillan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 54 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. McMillan, more than 65% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. McMillan ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 65th percentile54 procedures
- Colonoscopy
- 57th percentile36 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Ross Howard McMillan has 3 publications on record
Dmand AI links 3 papers to Dr. McMillan, published from 2020 to 2024. 2024 was the busiest year, with 2. Dr. McMillan has published most often in JAMA Netw Open. Dr. McMillan's most frequent co-authors are Monique Jindal, MD, MPH, Camila Mercedes Mateo and Edwin K. McDonald.
Papers3
Years published2020 to 2024
Dr. McMillan's most frequent co-authors
- Monique Jindal, MD, MPH1 shared paper
- Camila Mercedes Mateo1 shared paper
- Edwin K. McDonald1 shared paper
Recent publications by Dr. McMillan
JAMA Netw Open
InflammationMetabolic SyndromeRacism
Attitude to HealthNutrition SurveysObesity
See who Dr. McMillan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. McMillan works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Ross Howard McMillan received $618 in industry payments from 2022 to 2025
CMS Open Payments shows 8 general payments to Dr. McMillan from 5 drug and device companies from 2022 to 2025. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $208.
General payments to Dr. McMillan by program year, 2022 to 2025
Companies that paid Dr. McMillan the most, 2022 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Ross Howard McMillan graduated from Johns Hopkins University School of Medicine
Dr. McMillan graduated from Johns Hopkins University School of Medicine in 2018.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Ross Howard McMillan'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 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 Data |
| 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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Ross Howard McMillan
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. Ross Howard McMillan's NPI number?
Dr. Ross Howard McMillan's NPI number is 1578099578. It was assigned on May 11, 2017, and it is active in the NPI Registry.
What kind of doctor is Dr. Ross Howard McMillan?
Dr. Ross Howard McMillan is an internist in Chicago, Illinois. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Ross Howard McMillan practice?
Dr. McMillan practices at 5841 S Maryland Ave, Chicago, IL 60637. Dr. McMillan's primary practice is The University of Chicago Medical Center in Chicago, Illinois. Dmand AI also links Dr. McMillan to 1 hospital and 1 medical group.
What is Dr. Ross Howard McMillan's office phone number?
The practice phone on file for Dr. McMillan is (773) 702-1530.
What is Dr. Ross Howard McMillan's medical license number?
Dr. McMillan holds Illinois license 036156732.
Which hospitals is Dr. Ross Howard McMillan affiliated with?
Dr. McMillan is affiliated with University of Chicago Medical Center. Dmand AI links Dr. McMillan to 1 more hospital.
What medical group is Dr. Ross Howard McMillan part of?
Dr. McMillan is linked to UChicago Medicine Physicians. Dmand AI links Dr. McMillan to 1 more medical group.
Does Dr. Ross Howard McMillan accept Medicare?
Yes. CMS data shows Dr. McMillan billed Medicare for 111 services in 2022, and Dr. McMillan accepts Medicare assignment.
What services does Dr. Ross Howard McMillan bill to Medicare?
In 2022, Dr. McMillan's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99233) and office visit, established patient (99214).
Where did Dr. Ross Howard McMillan go to medical school?
Dr. McMillan graduated from Johns Hopkins University School of Medicine in 2018.
Show 5 more questionsShow fewer questions
What drugs does Dr. Ross Howard McMillan prescribe most?
In 2021 Medicare Part D data, Dr. McMillan's most prescribed drugs by claims were Atorvastatin Calcium, Gabapentin and Simvastatin.
Has Dr. Ross Howard McMillan received payments from drug or device companies?
CMS Open Payments shows $618 in general payments to Dr. McMillan from 5 companies from 2022 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Ross Howard McMillan been practicing?
Dr. McMillan graduated from medical school in 2018, 8 years ago.
Does Dr. Ross Howard McMillan do research?
Dmand AI links 3 publications to Dr. McMillan, published from 2020 to 2024.
Who does Dr. Ross Howard McMillan publish with?
Dr. McMillan's most frequent co-authors are Monique Jindal, MD, MPH (1 shared paper), Camila Mercedes Mateo (1 shared paper) and Edwin K. McDonald (1 shared paper).
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