Dr. Marie C. McMillen, DO
- Medicare services, 2024
- 444
- Medicare patients, 2024
- 160
- Part D claims, 2017
- 33
- Hospital affiliations
- 3
- Industry payments
- $435
- Practice address
- 3421 West Ninth Street, Waterloo, IA 50702
- Practice phone
- Call (319) 272-8000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. McMillen'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. Marie C. McMillen is a neurologist in Waterloo, Iowa
Dr. McMillen practices at MercyOne Waterloo Medical Center in Waterloo, Iowa, part of Trinity Health.
Dr. McMillen's NPI, 1255712618, was assigned on June 11, 2015. Dr. McMillen holds Iowa license DO-05614.
- NPI
- 1255712618NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7618232661
- NPI enumeration date
- June 11, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (319) 272-8000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Marie C. McMillen practices at MercyOne Waterloo Medical Center in Waterloo, Iowa
Dr. McMillen's primary practice is MercyOne Waterloo Medical Center, at 3421 West Ninth Street, Waterloo, IA 50702 in Black Hawk County. The practice phone is (319) 272-8000.
- MercyOne Waterloo Medical Center3421 West Ninth Street, Waterloo, IA 50702 · Black Hawk CountyPhone(319) 272-8000
Source: Dmand AI Affiliation Data
Dr. Marie C. McMillen is affiliated with 4 sites of care and 1 medical group
Dr. McMillen's primary practice is MercyOne Waterloo Medical Center in Waterloo, Iowa, part of Trinity Health. Dr. McMillen is also affiliated with MercyOne Oelwein Medical Center. The medical group on file is MercyOne Waterloo OB/GYN. Dmand AI also links Dr. McMillen to 1 more hospital and 1 group practice or clinic, 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. Marie C. McMillen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. McMillen practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| MercyOne Waterloo Medical Center | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Trinity Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Marie C. McMillen is one of 136 neurologists in Iowa
Neurology is Dr. McMillen's primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dmand AI has Dr. McMillen's licenses on file in 3 states: Iowa, Arizona and Indiana.
Specialties and state licenses
- Neurology, IowaPrimary
- Arizona license
- Indiana license
Neurologists near Dr. McMillen
Counts of neurologists 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. Marie C. McMillen billed Medicare for 444 services in 2024
CMS data shows 444 Medicare services from Dr. McMillen across 7 procedure codes in 2024, for 160 Medicare patients. Medicare paid $29,014 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. McMillen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3892024: 3841%
- Tests and treatments
- 2023: 312024: 4855%
- Other services
- 2023: 02024: 12
Dr. McMillen compared with the Iowa median for neurologists, 2024
- Dr. McMillen
- Iowa median
- Medicare services
- 444vs 29849% above
- Medicare patients
- 160vs 19819% below
- Part D claims
- 33vs 24186% below
Medians across 133 neurologists in Iowa with Dmand AI profiles that report each measure.
Dr. McMillen'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.
Need commercial claims for Dr. McMillen?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. McMillen and other neurologists in Iowa.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Marie C. McMillen treated 160 Medicare patients in 2024, average age 75
CMS counts 160 Medicare patients who saw Dr. McMillen in 2024. The largest group is 65 to 74, with 58 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 18% are also on Medicaid. Their average risk score is 1.82, 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. McMillen's median patient age at 72, with 55% women.
Dr. McMillen's Medicare patients by age, 2024
Dr. McMillen's Medicare patients by sex, 2024
- Women8654%
- Men7446%
Chronic conditions among Dr. McMillen's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis59%
- Mood disorders58%
- Stroke or TIA58%
- Depression56%
- Anxiety49%
- Ischemic heart disease48%
Share of Medicare patients with each condition. A patient can have several.
Dr. McMillen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women55%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Marie C. McMillen wrote 33 Medicare Part D claims in 2017
In 2017, Dr. McMillen wrote 33 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $339 in total drug cost.
Dr. McMillen's most prescribed drugs by claims, 2017
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
How Dr. Marie C. McMillen takes part in Medicare
Dr. McMillen 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)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Marie C. McMillen received $435 in industry payments from 2018 to 2025
CMS Open Payments shows 17 general payments to Dr. McMillen from 9 drug and device companies from 2018 to 2025. Food and beverage make up the largest share, 100% of the total. LivaNova USA, Inc. paid the most, $140.
General payments to Dr. McMillen by program year, 2018 to 2025
Companies that paid Dr. McMillen the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Marie C. McMillen'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) |
| 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) |
| 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. Marie C. McMillen
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. Marie C. McMillen's NPI number?
Dr. Marie C. McMillen's NPI number is 1255712618. It was assigned on June 11, 2015, and it is active in the NPI Registry.
What kind of doctor is Dr. Marie C. McMillen?
Dr. Marie C. McMillen is a neurologist in Waterloo, Iowa. The primary specialty in the NPI Registry is Neurology Physician (taxonomy code 2084N0400X).
Where does Dr. Marie C. McMillen practice?
Dr. McMillen practices at 3421 West Ninth Street, Waterloo, IA 50702. Dr. McMillen's primary practice is MercyOne Waterloo Medical Center in Waterloo, Iowa, part of Trinity Health. Dmand AI also links Dr. McMillen to 1 hospital and 1 group practice or clinic.
What is Dr. Marie C. McMillen's office phone number?
The practice phone on file for Dr. McMillen is (319) 272-8000.
What is Dr. Marie C. McMillen's medical license number?
Dr. McMillen holds Iowa license DO-05614, one of the licenses on file in 3 states.
Which states has Dr. Marie C. McMillen been licensed in?
Dmand AI has state licenses on file for Dr. McMillen in Iowa, Arizona and Indiana.
Which hospitals is Dr. Marie C. McMillen affiliated with?
Dr. McMillen practices at MercyOne Waterloo Medical Center in Waterloo, Iowa. Dr. McMillen is also affiliated with MercyOne Oelwein Medical Center. Dmand AI links Dr. McMillen to 1 more hospital.
What medical group is Dr. Marie C. McMillen part of?
Dr. McMillen is linked to MercyOne Waterloo OB/GYN.
Does Dr. Marie C. McMillen accept Medicare?
Yes. CMS data shows Dr. McMillen billed Medicare for 444 services in 2024, and Dr. McMillen accepts Medicare assignment.
How many Medicare patients does Dr. Marie C. McMillen see?
CMS counts 160 Medicare patients who saw Dr. McMillen in 2024, with an average age of 75.
Show 4 more questionsShow fewer questions
What services does Dr. Marie C. McMillen bill to Medicare?
In 2024, Dr. McMillen's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99222) and nerve and brain test (95816).
What drugs does Dr. Marie C. McMillen prescribe most?
In 2017 Medicare Part D data, Dr. McMillen's most prescribed drugs by claims were Atorvastatin Calcium.
Has Dr. Marie C. McMillen received payments from drug or device companies?
CMS Open Payments shows $435 in general payments to Dr. McMillen from 9 companies from 2018 to 2025. The largest total came from LivaNova USA, Inc.
How long has Dr. Marie C. McMillen been practicing?
Dr. McMillen graduated from medical school in 2015, 11 years ago.
Selling to neurology practices?
See neurologists in Iowa by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card