Mark D. Hahn, OD
- Medicare patients, 2024
- 151
- Part D claims, 2024
- 281
- Industry payments
- $14
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 100 Cherry Ln, Washington, IL 61571
- Practice phone
- Call (309) 444-2277
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Bard Optical
Washington, Illinois
Find Mark Hahn'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. Hahn is an optometrist in Washington, Illinois
Mark Hahn practices at Bard Optical in Washington, Illinois.
Mark Hahn's NPI, 1528055969, was assigned on September 30, 2005. Mark Hahn graduated from Illinois College of Optometry at Chicago in 2000. Mark Hahn holds Illinois license 04600009257.
- NPI
- 1528055969NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6305834979
- NPI enumeration date
- September 30, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (309) 444-2277
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 52
- Medical school graduation
- 2000
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Mark D. Hahn practices at Bard Optical in Washington, Illinois
Mark Hahn's primary practice is Bard Optical, at 100 Cherry Ln, Washington, IL 61571 in Tazewell County. The practice phone is (309) 444-2277.
- Bard Optical100 Cherry Ln, Washington, IL 61571 · Tazewell CountyPhone(309) 444-2277
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Mark D. Hahn is affiliated with 2 sites of care and 1 medical group
Mark Hahn's primary practice is Bard Optical in Washington, Illinois. Dmand AI also links Mark Hahn to 1 group practice or clinic and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Mark D. Hahn's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Mark Hahn practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Bard Optical | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Mark D. Hahn is one of 2,194 optometrists in Illinois
Optometrist is Mark Hahn's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Mark Hahn is licensed in Illinois.
Specialties and state licenses
- Optometrist, IllinoisPrimary
Optometrists near Mark Hahn
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. Hahn treated 151 Medicare patients in 2024, average age 74
CMS counts 151 Medicare patients who saw Mark Hahn in 2024. The largest group is 65 to 74, with 76 patients. 75% of them have high cholesterol, and 72% have high blood pressure. 14% are also on Medicaid. Their average risk score is 0.91, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Mark Hahn's median patient age at 69, with 58% women.
Mark Hahn's Medicare patients by age, 2024
Mark Hahn's Medicare patients by sex, 2024
- Women9261%
- Men5939%
Chronic conditions among Mark Hahn's Medicare patients, 2024
- High cholesterol75%
- High blood pressure72%
- Arthritis38%
- Diabetes30%
- Chronic kidney disease21%
- Mood disorders17%
- Depression16%
- Anxiety15%
Share of Medicare patients with each condition. A patient can have several.
Mark Hahn's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women58%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Mark D. Hahn wrote 281 Medicare Part D claims in 2024
In 2024, Mark Hahn wrote 281 Medicare Part D claims for 78 patients. 84% of them were for generic drugs.
Mark Hahn's Part D claims by kind of drug, 2024
- Generic237 claims84%
- Brand-name44 claims16%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Mark D. Hahn takes part in Medicare
Mark Hahn accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Cataract surgery: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Mark D. Hahn received $14 in industry payments in 2025
CMS Open Payments shows 1 general payment to Mark Hahn from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. CooperVision Inc. paid the most, $14.
Companies that paid Mark Hahn the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Mark D. Hahn graduated from Illinois College of Optometry at Chicago
Mark Hahn graduated from Illinois College of Optometry at Chicago in 2000.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Mark D. Hahn'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 |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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. Hahn
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. Hahn's NPI number?
Mark D. Hahn's NPI number is 1528055969. It was assigned on September 30, 2005, and it is active in the NPI Registry.
What does Mark D. Hahn specialize in?
Mark D. Hahn is an optometrist in Washington, Illinois. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Mark D. Hahn practice?
Mark Hahn practices at 100 Cherry Ln, Washington, IL 61571. Mark Hahn's primary practice is Bard Optical in Washington, Illinois. Dmand AI also links Mark Hahn to 1 group practice or clinic and 1 medical group.
What is Mark D. Hahn's office phone number?
The practice phone on file for Mark Hahn is (309) 444-2277.
What is Mark D. Hahn's medical license number?
Mark Hahn holds Illinois license 04600009257.
Does Mark D. Hahn accept Medicare?
Yes. CMS lists Mark Hahn as accepting Medicare assignment.
How many Medicare patients does Mark D. Hahn see?
CMS counts 151 Medicare patients who saw Mark Hahn in 2024, with an average age of 74.
Where did Mark D. Hahn go to medical school?
Mark Hahn graduated from Illinois College of Optometry at Chicago in 2000.
Has Mark D. Hahn received payments from drug or device companies?
CMS Open Payments shows $14 in general payments to Mark Hahn from 1 company from 2025 to 2025. The largest total came from CooperVision Inc.
How long has Mark D. Hahn been practicing?
Mark Hahn graduated from medical school in 2000, 26 years ago.
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