Mark G. Holmes, OD
- Medicare patients, 2024
- 1,321
- Part D claims, 2024
- 1,432
- Industry payments
- $268
- Medical group
- 1
- State license
- 1
- Practice address
- 309 E Church St, Marshalltown, IA 50158
- Practice phone
- Call (641) 754-6200
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Wolfe Eye Clinic- Marshalltown
Marshalltown, Iowa
Find Mark Holmes' 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 G. Holmes is an optometrist in Marshalltown, Iowa
Mark Holmes practices at Wolfe Eye Clinic- Marshalltown in Marshalltown, Iowa.
Mark Holmes' NPI, 1306838115, was assigned on August 17, 2005. Mark Holmes graduated from Indiana University - School of Optometry in 1996. Mark Holmes holds Iowa license 02070.
- NPI
- 1306838115NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6103811922
- NPI enumeration date
- August 17, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (641) 754-6200
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 56
- Medical school graduation
- 1996
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Mark G. Holmes practices at Wolfe Eye Clinic- Marshalltown in Marshalltown, Iowa
Mark Holmes' primary practice is Wolfe Eye Clinic- Marshalltown, at 309 E Church St, Marshalltown, IA 50158 in Marshall County. The practice phone is (641) 754-6200.
- Wolfe Eye Clinic- Marshalltown309 E Church St, Marshalltown, IA 50158 · Marshall CountyPhone(641) 754-6200
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Mark G. Holmes is affiliated with 1 site of care and 1 medical group
Mark Holmes' primary practice is Wolfe Eye Clinic- Marshalltown in Marshalltown, Iowa. Dmand AI also links Mark Holmes to 1 medical group, 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 G. Holmes' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Mark Holmes practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Wolfe Eye Clinic- Marshalltown | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Mark G. Holmes is one of 501 optometrists in Iowa
Optometrist is Mark Holmes' primary specialty in the NPI Registry, under taxonomy code 152W00000X. Mark Holmes is licensed in Iowa.
Specialties and state licenses
- Optometrist, IowaPrimary
Optometrists near Mark Holmes
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 G. Holmes treated 1,321 Medicare patients in 2024, average age 76
CMS counts 1,321 Medicare patients who saw Mark Holmes in 2024. The largest group is 65 to 74, with 564 patients. 75% of them have high cholesterol, and 71% have high blood pressure. 3% are also on Medicaid. Their average risk score is 1.00, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Mark Holmes' median patient age at 73, with 57% women.
Mark Holmes' Medicare patients by age, 2024
Mark Holmes' Medicare patients by sex, 2024
- Women80661%
- Men51539%
Chronic conditions among Mark Holmes' Medicare patients, 2024
- High cholesterol75%
- High blood pressure71%
- Arthritis42%
- Diabetes31%
- Chronic kidney disease23%
- Ischemic heart disease23%
- Mood disorders22%
- Depression21%
Share of Medicare patients with each condition. A patient can have several.
Mark Holmes' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women57%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Mark G. Holmes wrote 1,432 Medicare Part D claims in 2024
In 2024, Mark Holmes wrote 1,432 Medicare Part D claims for 312 patients. 66% of them were for generic drugs.
Mark Holmes' Part D claims by kind of drug, 2024
- Generic939 claims66%
- Brand-name493 claims34%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Mark G. Holmes takes part in Medicare
Mark Holmes accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Mark G. Holmes received $268 in industry payments in 2025
CMS Open Payments shows 4 general payments to Mark Holmes from 2 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Alcon Laboratories Inc paid the most, $146.
Companies that paid Mark Holmes 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 G. Holmes graduated from Indiana University - School of Optometry
Mark Holmes graduated from Indiana University - School of Optometry in 1996.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Mark G. Holmes'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) |
| 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 G. Holmes
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 G. Holmes' NPI number?
Mark G. Holmes' NPI number is 1306838115. It was assigned on August 17, 2005, and it is active in the NPI Registry.
What does Mark G. Holmes specialize in?
Mark G. Holmes is an optometrist in Marshalltown, Iowa. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Mark G. Holmes practice?
Mark Holmes practices at 309 E Church St, Marshalltown, IA 50158. Mark Holmes' primary practice is Wolfe Eye Clinic- Marshalltown in Marshalltown, Iowa. Dmand AI also links Mark Holmes to 1 medical group.
What is Mark G. Holmes' office phone number?
The practice phone on file for Mark Holmes is (641) 754-6200.
What is Mark G. Holmes' medical license number?
Mark Holmes holds Iowa license 02070.
Does Mark G. Holmes accept Medicare?
Yes. CMS lists Mark Holmes as accepting Medicare assignment.
How many Medicare patients does Mark G. Holmes see?
CMS counts 1,321 Medicare patients who saw Mark Holmes in 2024, with an average age of 76.
Where did Mark G. Holmes go to medical school?
Mark Holmes graduated from Indiana University - School of Optometry in 1996.
Has Mark G. Holmes received payments from drug or device companies?
CMS Open Payments shows $268 in general payments to Mark Holmes from 2 companies from 2025 to 2025. The largest total came from Alcon Laboratories Inc.
How long has Mark G. Holmes been practicing?
Mark Holmes graduated from medical school in 1996, 30 years ago.
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