Dr. Matthew Richard Mills , MD
Specialist • Chicago, IL
625 N Michigan Ave, Suite 1715
Chicago, IL 606113110
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on January 29, 2007; this date does not establish years in practice.
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Published CMS data list 72 Medicare Part D prescriptions, including refills, in 2023.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2023. Published rows only; this is not a quality measure.
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Published Part D records, 2023:
- Clonazepam — 17 prescription fills, including refills.
- Dextroamphetamine-Amphetamine (Dextroamphetamine/Amphetamine) — 17 prescription fills, including refills.
- Zolpidem Tartrate — 14 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2023. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 5 records in the table · Guide: How to read Medicare Part D prescriber data
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Medicare Part D prescriptions went from 23 in 2018 to 72 in 2023.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2018–2023.
Practice Location & Contact Primary Location
625 N Michigan Ave
Suite 1715
Chicago, IL 606113110
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Specialist: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
88 standardized 30-day fills in 2023
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$1,446 in 2023
The total cost of these prescriptions in 2023, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2023.
NPI first issued
2007
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Compared with the same specialty in Chicago and Illinois
Billing and prescribing volume is not a quality rating.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Mills are from 2023.
231 active clinicians are listed under Specialist with a practice address in Chicago, IL (1,157 in Illinois).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Chicago
2.2% of these 231 clinicians have the CMS telehealth indicator.
6.5% of these 231 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 213% from 23 in 2018 to 72 in 2023.
- 2018: 23
- 2019: 11
- 2020: 14
- 2022: 51
- 2023: 72
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30-day fills
30-day fills increased 283% from 23 in 2018 to 88 in 2023.
- 2018: 23
- 2019: 11
- 2020: 14
- 2022: 95
- 2023: 88
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Part D drug cost
Part D drug cost increased 40% from $1,032 in 2018 to $1,446 in 2023.
- 2018: $1,032
- 2019: $21
- 2020: $617
- 2022: $960
- 2023: $1,446
Sources: CMS Medicare Part D Prescribers (2023), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2023.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Clonazepam | Clonazepam | 17 | 417 | $194.88 | — |
| Dextroamphetamine-Amphetamine | Dextroamphetamine/Amphetamine | 17 | 510 | $331.69 | — |
| Zolpidem Tartrate | Zolpidem Tartrate | 14 | 350 | $113.93 | — |
| Doxepin Hcl | Doxepin Hcl | 13 | 390 | $558.55 | — |
| Lamotrigine | Lamotrigine | 11 | 810 | $247.42 | — |
Source: CMS Part D by Provider and Drug, 2023; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 174400000X
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
Additional State Medicaid & Healthcare Payer Identifiers
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Psychiatry & Neurology - Psychiatry
Doctor of Medicine (M.D.)
Social Worker - Clinical
Licensed Clinical Social Worker
Psychiatry & Neurology - Psychiatry
Doctor of Medicine (M.D.)
Psychiatry & Neurology - Psychiatry
Doctor of Osteopathic Medicine (D.O.)
Psychiatry & Neurology - Psychiatry
Doctor of Medicine (M.D.)
Career & Practice History
NPI enumerated January 29, 2007.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Specialists in Chicago
- Dr. Martin Greenberg, MD
- Dr. Mark Gindi, MD
- Dr. Kris Mcgrath, MD
- Dr. Christina Bonner, MD
- Dr. David Benditzson, MD
- Dr. Gordon Derman, MD
Mailing Address
1850 W Oakdale Ave, Rear Coach
Chicago, IL 606574024