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JOHN ROBERT MCMILLIN M.D.
NPI 1831432343
Psychiatry & Neurology - Psychiatry in Chicago, IL

Active since April 03, 2013PECOS EnrolledAccepts Medicare Assignment
3743 HIGHLAND AVENUE, SUITE 2001, CHICAGO, IL 60673(847) 390-5900 Get Directions Write a Review

NPPES record last updated: June 8, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Oct 9, 2025, Dec 31, 2021, Dec 17, 2021 and 1 more (4 updates tracked since 2019).

About John Robert Mcmillin M.d. NPPES

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

JOHN ROBERT MCMILLIN M.D. (NPI 1831432343) is an individual psychiatry provider in Chicago, Illinois, licensed in Illinois (036147447) and active in the NPI registry since April 2013. He is enrolled in Medicare PECOS, maintains a secondary practice location in Downers Grove, and is a graduate of Other (2012).

NPPES Registry Identity

NPI1831432343
Entity TypeIndividualMale
Primary Taxonomy2084P0800X
Provider Legal NameJOHN ROBERT MCMILLINCredential: M.D.
Location Address3743 HIGHLAND AVENUE, SUITE 2001Chicago, IL 60673-0001
Mailing Address29373 Network PlChicago, IL 60673-1293 · (847) 390-5900
Phone(847) 390-5900
Sole ProprietorNo
Medical School CMSOtherGraduated 2012
Enumeration DateApril 3, 2013
Last NPPES UpdateJune 8, 20264 updates tracked since enumeration
NPPES CertifiedJune 8, 2026
✔ NPI 1831432343 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
License✔ Licensed in IL · 036147447
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
3743 HIGHLAND AVENUE, Chicago, IL 60673
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Secondary Practice Location 1

Location 11341 Warren AveDowners Grove, IL 60515-3437 · Phone (630) 719-5454

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Home State Health, Ambetter Health, Ambetter Health of Delaware.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

John Robert Mcmillin M.d. 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 ID9032431564
PECOS Enrollment IDI20181017000425
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.

Areas of Expertise CMS Part B claims

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.

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.
320 services57 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60673 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
$183.39 typical visit price
range $60.08 – $183.39
Typical copayment $45.84 (range $15.02 – $45.84)
Most-billed visit code 99205
Established Patient
$74.80 typical visit price
range $18.97 – $148.12
Typical copayment $18.70 (range $4.74 – $37.03)
Most-billed visit code 99213
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 John Mcmillin's NPI number?

The NPI number for John Mcmillin is 1831432343. It was assigned to this individual provider in the NPPES registry on April 3, 2013.

Where is John Mcmillin located?

John Mcmillin practices at 3743 Highland Avenue Suite 2001, Chicago, IL 60673. The listed phone number is (847) 390-5900.

What is John Mcmillin's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is John Mcmillin enrolled in Medicare?

Yes. John Mcmillin 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.

What insurance does John Mcmillin accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Home State Health list John Mcmillin 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.

When was this NPI record last updated?

The NPPES record for John Mcmillin was last updated on June 8, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS; the most recent full sync was completed on July 26, 2026. Anyone can also request an on-demand re-check of this record against the live CMS registry, directly from this page.