Mark D. Johnson, OD
- Medicare patients, 2024
- 24
- Part D claims, 2024
- 71
- Affiliated sites
- 1
- Medical group
- 1
- State licenses
- 2
- Practice address
- 2525 Green Mount Commons Dr Suite 290 Suite 290, Belleville, IL 62221-6735
- Practice phone
- Call (618) 233-7800
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Clarkson Eyecare - Belleville
Eye care practice · Belleville, Illinois
Find Mark Johnson'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.
Mark D. Johnson is an optometrist in Belleville, Illinois
Mark Johnson practices at Clarkson Eyecare - Belleville in Belleville, Illinois.
Mark Johnson's NPI, 1881665073, was assigned on January 27, 2006. Mark Johnson holds Illinois license 046010751.
- NPI
- 1881665073NPI Registry (opens in a new tab)
- NPI enumeration date
- January 27, 2006
- NPI status
- Active
- Practice phone
- (618) 233-7800
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Mark D. Johnson practices at Clarkson Eyecare - Belleville in Belleville, Illinois
Mark Johnson's primary practice is Clarkson Eyecare - Belleville, at 2525 Green Mount Commons Dr Suite 290 Suite 290, Belleville, IL 62221-6735. The practice phone is (618) 233-7800.
- Clarkson Eyecare - Belleville2525 Green Mount Commons Dr Suite 290 Suite 290, Belleville, IL 62221-6735Phone(618) 233-7800
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Mark D. Johnson is affiliated with 1 site of care and 1 medical group
Mark Johnson's primary practice is Clarkson Eyecare - Belleville in Belleville, Illinois. Dmand AI also links Mark Johnson to 1 medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Mark D. Johnson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Mark Johnson practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Clarkson Eyecare - Belleville | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Mark D. Johnson is one of 2,194 optometrists in Illinois
Optometrist is Mark Johnson's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Dmand AI has Mark Johnson's licenses on file in 2 states: Illinois and Indiana.
Specialties and state licenses
- Optometrist, IllinoisPrimary
- Indiana license
Optometrists near Mark Johnson
Counts of optometrists 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
Mark D. Johnson treated 24 Medicare patients in 2024, average age 71
CMS counts 24 Medicare patients who saw Mark Johnson in 2024. 75% of them have high cholesterol, and 71% have high blood pressure. Their average risk score is 0.79, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Mark Johnson's median patient age at 68, with 55% women.
Chronic conditions among Mark Johnson's Medicare patients, 2024
- High cholesterol75%
- High blood pressure71%
- Arthritis54%
Share of Medicare patients with each condition. A patient can have several.
Mark Johnson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women55%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Mark D. Johnson wrote 71 Medicare Part D claims in 2024
In 2024, Mark Johnson wrote 71 Medicare Part D claims for 13 patients. 65% of them were for generic drugs.
Mark Johnson's Part D claims by kind of drug, 2024
- Generic46 claims65%
- Brand-name25 claims35%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Sources for Mark D. Johnson'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 | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider (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 Mark D. Johnson
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Mark D. Johnson's NPI number?
Mark D. Johnson's NPI number is 1881665073. It was assigned on January 27, 2006, and it is active in the NPI Registry.
What does Mark D. Johnson specialize in?
Mark D. Johnson is an optometrist in Belleville, Illinois. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Mark D. Johnson practice?
Mark Johnson practices at 2525 Green Mount Commons Dr Suite 290 Suite 290, Belleville, IL 62221-6735. Mark Johnson's primary practice is Clarkson Eyecare - Belleville in Belleville, Illinois. Dmand AI also links Mark Johnson to 1 medical group.
What is Mark D. Johnson's office phone number?
The practice phone on file for Mark Johnson is (618) 233-7800.
What is Mark D. Johnson's medical license number?
Mark Johnson holds Illinois license 046010751, one of the licenses on file in 2 states.
Which states has Mark D. Johnson been licensed in?
Dmand AI has state licenses on file for Mark Johnson in Illinois and Indiana.
How many Medicare patients does Mark D. Johnson see?
CMS counts 24 Medicare patients who saw Mark Johnson in 2024, with an average age of 71.
How long has Mark D. Johnson been practicing?
Mark Johnson graduated from medical school in 1986, 40 years ago.
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