Dr. Brett Allan Johnson , MD
General Practice β’ Chicago, IL
2555 N Clark St Apt 1409
Chicago, IL 606141757
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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Dr. Brett Johnson is listed in NPPES under General Practice.
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NPI assigned on May 13, 2021; this date does not establish years in practice.
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Published CMS data list 29 Medicare Part D prescriptions, including refills, in 2023.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2023. Published rows only; this is not a quality measure.
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Published Part D records, 2023:
- Ondansetron Hcl β 17 prescription fills, including refills.
- Tramadol Hcl β 12 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2023. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table Β· Guide: How to read Medicare Part D prescriber data
Practice Location & Contact Primary Location
2555 N Clark St Apt 1409
Chicago, IL 606141757
What Public CMS Data Show
General Practice: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
29 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
$104 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 β by Provider and Drug, 2023.
Open Payments general payments, program year 2025
All general payments: $76.10 across 3 records.
By nature of payment
- Food and Beverage: $76.10 across 3 records.
Reporting-company totals
- W. L. Gore & Associates, Inc.: $60.54 across 2 records.
- Shionogi Inc: $15.56 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
NPI first issued
2021
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, βDoes your provider accept Medicare as full payment?β
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.
Can order Medicare-covered services
CMS lists Dr. Johnson as eligible to order or refer durable medical equipment (DME) for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
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. Johnson are from 2023.
98 active clinicians are listed under General Practice with a practice address in Chicago, IL (291 in Illinois).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Chicago
3.1% of these 98 clinicians have the CMS telehealth indicator.
12.2% of these 98 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
CMS data for Part D prescriptions are available for 2023 only.
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30-day fills
CMS data for 30-day fills are available for 2023 only.
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Part D drug cost
CMS data for Part D drug cost are available for 2023 only.
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Industry payments (Open Payments)
CMS data for industry payments (Open Payments) are available for 2025 only.
Sources: CMS Medicare Part D Prescribers (2023), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo Β· Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 β December 31, 2025): fewer than 11 records totaling $76.10.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| W. L. Gore & Associates, Inc. |
Food and Beverage
In-kind items and services
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EXCLUDER Conformable AAA Endoprosthesis with Active Control | General | $30.72 |
| W. L. Gore & Associates, Inc. |
Food and Beverage
In-kind items and services
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EXCLUDER Conformable AAA Endoprosthesis with Active Control | General | $29.82 |
| Shionogi Inc |
Food and Beverage
In-kind items and services
|
Fetroja | General | $15.56 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
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 |
|---|---|---|---|---|---|
| Ondansetron Hcl | Ondansetron Hcl | 17 | 101 | $82.10 | 16 |
| Tramadol Hcl | Tramadol Hcl | 12 | 52 | $21.93 | 12 |
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
Self-certified to NPPES: 2024-06-03NUCC Taxonomy Code: 208D00000X
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.
NUCC Taxonomy Code: 390200000X
An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSSources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Internal Medicine
Student in an Organized Health Care Education/Training Program
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Student in an Organized Health Care Education/Training Program
Doctor of Medicine (M.D.)
Radiology - Vascular & Interventional Radiology
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 2555 N CLARK ST APT 1409, CHICAGO, IL 606141757 (Tel: 2148202361)
Registered at 2555 N CLARK ST APT 1409, CHICAGO, IL 606141757 (Tel: 2143850777)
NPI status registered as active in NPPES database
Registered at 3500 GASTON AVE, DALLAS, TX 752462017 (Tel: 2148202361)
Registered at 3536 PINNACLE BAY PT, LITTLE ELM, TX 750683102 (Tel: 2143850777)
Recorded as BRETT JOHNSON, MD
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other General Practices in Chicago
- Dr. Renee Hartz, MD
- Dr. John Wu, MD
- Dr. Bhavana Vaidya, MD
- Dr. Queen Aghaji, MD
- Dr. Charles Parrish, MD
- Dr. Mohammed Ahmed, MD
Mailing Address
2555 N Clark St Apt 1409
Chicago, IL 606141757
Phone: 2143850777