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MARIE MCMILLEN DO
NPI 1255712618
Psychiatry & Neurology - Neurology in Waterloo, IA

Active since June 11, 2015PECOS EnrolledAccepts Medicare Assignment
2710 SAINT FRANCIS DR STE 201, WATERLOO, IA 50702(319) 272-5000(319) 272-6730 Get Directions Write a Review

NPPES record last updated: December 14, 2020. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Dec 14, 2020, Jul 17, 2020 (2 updates tracked since 2020).

About Marie Mcmillen Do NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARIE MCMILLEN DO (NPI 1255712618) is an individual neurology provider in Waterloo, Iowa, licensed in Iowa (DO-05614) and active in the NPI registry since June 2015. She is enrolled in Medicare PECOS, is affiliated with Sartori Memorial Hospital, Inc, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1255712618
Entity TypeIndividualFemale
Primary Taxonomy2084N0400X
Provider Legal NameMARIE MCMILLENCredential: DO
Location Address2710 SAINT FRANCIS DR STE 201Waterloo, IA 50702-5664
Mailing Address2710 Saint Francis Dr Ste 201Waterloo, IA 50702-5664 · (319) 272-5000 · Fax (319) 272-6730
Phone(319) 272-5000
Fax(319) 272-6730
Sole ProprietorNo
Medical School CMSOtherGraduated 2015
Enumeration DateJune 11, 2015
Last NPPES UpdateDecember 14, 20202 updates tracked since enumeration
NPPES CertifiedDecember 14, 2020
✔ NPI 1255712618 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · NeurologyAllopathic & Osteopathic Physicians
Taxonomy Code2084N0400X
Licenses✔ Licensed in IA · DO-05614✔ Licensed in IN · 02005698B✔ Licensed in AZ · R2489
Definition
A Neurologist specializes in the diagnosis and treatment of diseases or impaired function of the brain, spinal cord, peripheral nerves, muscles, autonomic nervous system, and blood vessels that relate to these structures.
2710 SAINT FRANCIS DR STE 201, Waterloo, IA 50702
Open in Google Maps ↗

Secondary Practice Locations 2

Location 11501 N Campbell AveTucson, AZ 85724-0001 · Phone (520) 626-3894
Location 2355 W 16th St Ste 4700Indianapolis, IN 46202 · Phone (317) 963-7419

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from NH Healthy Families, Ambetter from Sunflower Health Plan, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Marie Mcmillen Do is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7618232661
PECOS Enrollment IDI20200813000880
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Marie Mcmillen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Covenant Medical Center Inc
0.1 mi
Emergency Medicine
3421 W 9TH ST
Waterloo, IA 50702
  • Reassigned Medicare billing, Iowa enrollment
  • 271 clinicians in this Medicare group
NPI 1528009545 (319) 272-7600

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 6

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
204 services109 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
136 services127 patients
Measurement of brain wave activity (eeg), awake and drowsy 95816
Measurement of brain wave activity, also known as an EEG, is a non-invasive test that records electrical patterns in your brain. This procedure is done when you're awake and drowsy to understand how your brain functions during different states of consciousness.
33 services32 patients
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231
Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.
28 services19 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
16 services14 patients
Measurement of brain wave activity (eeg), awake and asleep 95819
The measurement of brain wave activity, known as an EEG, records the brain's electrical signals. It's performed when you're awake and asleep to monitor your brain's functioning. It helps in diagnosing conditions like epilepsy, sleep disorders, and other neurological issues.
15 services13 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Sartori Memorial Hospital, Inc

Acute Care Hospitals · Cedar Falls, IA
OwnershipVoluntary non-profit - Church
CMS Certification Number160040
Location515 College StreetCedar Falls, IA 50613 · Black Hawk County
Emergency services

Mercyone Waterloo Medical Center

Acute Care Hospitals · Waterloo, IA
4/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number160067
Location3421 West Ninth StreetWaterloo, IA 50702 · Black Hawk County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 50702 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$122.23 typical visit price
range $52.96 – $161.40
Typical copayment $30.55 (range $13.24 – $40.35)
Most-billed visit code 99204
Established Patient
$94.05 typical visit price
range $16.91 – $131.98
Typical copayment $23.51 (range $4.22 – $32.99)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Marie Mcmillen's NPI number?

The NPI number for Marie Mcmillen is 1255712618. It was assigned to this individual provider in the NPPES registry on June 11, 2015.

Where is Marie Mcmillen located?

Marie Mcmillen practices at 2710 Saint Francis Dr Ste 201, Waterloo, IA 50702. The listed phone number is (319) 272-5000.

What is Marie Mcmillen's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.

Is Marie Mcmillen enrolled in Medicare?

Yes. Marie Mcmillen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Marie Mcmillen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marie Mcmillen reassigns Medicare benefits to Covenant Medical Center Inc (Waterloo, IA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Marie Mcmillen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Marie Mcmillen accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from NH Healthy Families, Ambetter from Sunflower Health Plan and Oscar Insurance Company and 1 other insurer list Marie Mcmillen as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Marie Mcmillen affiliated with any hospitals?

According to CMS data, Marie Mcmillen is affiliated with Sartori Memorial Hospital, Inc and Mercyone Waterloo Medical Center.

When was this NPI record last updated?

The NPPES record for Marie Mcmillen was last updated on December 14, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.