Dr. Mark Toyama, MD
- Medicare services, 2023
- 52
- Industry payments
- $15,896
- State license
- 1
- Year NPI issued
- 2005
- Practice address
- 676 N St Clair St, Chicago, IL 60611
- Practice phone
- Call (312) 255-1451
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Toyama'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. Mark Toyama is a general surgeon in Chicago, Illinois
Dr. Toyama practices in Chicago, Illinois.
Dr. Toyama's NPI, 1821085358, was assigned on September 30, 2005.
- NPI
- 1821085358NPI Registry (opens in a new tab)
- NPI enumeration date
- September 30, 2005
- NPI status
- Active
- Practice phone
- (312) 255-1451
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Mark Toyama's practice address is in Chicago, Illinois
Dr. Toyama's practice address in the NPI Registry is 676 N St Clair St, Chicago, IL 60611, in Cook County. The practice phone is (312) 255-1451.
- NPI Registry address676 N St Clair St, Chicago, IL 60611 · Cook CountyPhone(312) 255-1451
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Mark Toyama's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Toyama practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Toyama's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark Toyama is one of 1,217 general surgeons in Illinois
Surgery is Dr. Toyama's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Toyama has a license on file in Illinois.
Specialties and state licenses
- Surgery, Illinois
General surgeons near Dr. Toyama
Counts of general surgeons 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. Mark Toyama billed Medicare for 52 services in 2023
CMS data shows 52 Medicare services from Dr. Toyama across 3 procedure codes in 2023, all of them office visits. Medicare paid $4,047 for them. Every service was in an office.
Dr. Toyama's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 1122023: 5254%
- Surgery
- 2022: 372023: 0100%
Dr. Toyama compared with the Illinois median for general surgeons, 2023
- Dr. Toyama
- Illinois median
- Medicare services
- 52vs 19473% below
Medians across 1,031 general surgeons in Illinois with Dmand AI profiles that report each measure.
Dr. Toyama's most billed Medicare procedure codes, 2023
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Toyama and other general surgeons in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
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Dr. Mark Toyama received $15,896 in industry payments from 2016 to 2024
CMS Open Payments shows 252 general payments to Dr. Toyama from 48 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 38% of the total. Intuitive Surgical, Inc. paid the most, $12,084.
General payments to Dr. Toyama by program year, 2016 to 2024
General payments to Dr. Toyama by kind, 2016 to 2024
- Food and beverage$5,98938%
- Travel and lodging$5,89337%
- Education$4,01425%
Companies that paid Dr. Toyama the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Mark Toyama'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice 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 |
| 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. Mark Toyama
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. Mark Toyama's NPI number?
Dr. Mark Toyama's NPI number is 1821085358. It was assigned on September 30, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Toyama?
Dr. Mark Toyama is a general surgeon in Chicago, Illinois. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Mark Toyama practice?
Dr. Toyama practices at 676 N St Clair St, Chicago, IL 60611.
What is Dr. Mark Toyama's office phone number?
The practice phone on file for Dr. Toyama is (312) 255-1451.
Does Dr. Mark Toyama accept Medicare?
Yes. CMS data shows Dr. Toyama billed Medicare for 52 services in 2023.
What services does Dr. Mark Toyama bill to Medicare?
In 2023, Dr. Toyama's most billed Medicare services were office visit, new patient (99203), office visit, established patient (99213) and office visit, new patient (99204).
Has Dr. Mark Toyama received payments from drug or device companies?
CMS Open Payments shows $15,896 in general payments to Dr. Toyama from 48 companies from 2016 to 2024. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Mark Toyama been practicing?
Dr. Toyama's NPI was assigned in 2005.
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