Gary John Giesler, OD
- Medicare patients, 2024
- 90
- Part D claims, 2024
- 69
- Affiliated sites
- 1
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 15933 Clayton Rd, Ballwin, MO 63011
- Practice phone
- Call (636) 200-4393
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Clarkson Eyecare
Ballwin, Missouri
Find Gary Giesler'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.
Gary John Giesler is an optometrist in Ballwin, Missouri
Gary Giesler practices at Clarkson Eyecare in Ballwin, Missouri.
Gary Giesler's NPI, 1396834552, was assigned on October 12, 2006. Gary Giesler graduated from University of Houston - College of Optometry in 1975. Gary Giesler holds Missouri license TO2265.
- NPI
- 1396834552NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9830208727
- NPI enumeration date
- October 12, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (636) 200-4393
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 77
- Medical school graduation
- 1975
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Gary John Giesler practices at Clarkson Eyecare in Ballwin, Missouri
Gary Giesler's primary practice is Clarkson Eyecare, at 15933 Clayton Rd, Ballwin, MO 63011 in Saint Louis County. The practice phone is (636) 200-4393.
- Clarkson Eyecare15933 Clayton Rd, Ballwin, MO 63011 · Saint Louis CountyPhone(636) 200-4393
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Gary John Giesler is affiliated with 2 sites of care
Gary Giesler's primary practice is Clarkson Eyecare in Ballwin, Missouri. Dmand AI also links Gary Giesler to 1 physician office, 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 Gary John Giesler's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Gary Giesler practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Clarkson Eyecare | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Gary John Giesler is one of 866 optometrists in Missouri
Optometrist is Gary Giesler's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Gary Giesler is licensed in Missouri.
Specialties and state licenses
- Optometrist, MissouriPrimary
Optometrists near Gary Giesler
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
Gary John Giesler treated 90 Medicare patients in 2024, average age 74
CMS counts 90 Medicare patients who saw Gary Giesler in 2024. The largest group is 65 to 74, with 41 patients. 75% of them have high blood pressure, and 71% have high cholesterol. Their average risk score is 1.01, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Gary Giesler's median patient age at 72, with 54% women.
Gary Giesler's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Gary Giesler's Medicare patients by sex, 2024
- Women5157%
- Men3943%
Chronic conditions among Gary Giesler's Medicare patients, 2024
- High blood pressure75%
- High cholesterol71%
- Arthritis41%
- Diabetes32%
- Ischemic heart disease23%
- Chronic kidney disease22%
- Mood disorders20%
- Depression17%
Share of Medicare patients with each condition. A patient can have several.
Gary Giesler's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women54%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Gary John Giesler wrote 69 Medicare Part D claims in 2024
In 2024, Gary Giesler wrote 69 Medicare Part D claims for 20 patients. 62% of them were for generic drugs.
Gary Giesler's Part D claims by kind of drug, 2024
- Generic43 claims62%
- Brand-name26 claims38%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Gary John Giesler takes part in Medicare
Gary Giesler 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)
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Gary John Giesler graduated from University of Houston - College of Optometry
Gary Giesler graduated from University of Houston - College of Optometry in 1975.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Gary John Giesler'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) |
| 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 Gary John Giesler
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Gary John Giesler's NPI number?
Gary John Giesler's NPI number is 1396834552. It was assigned on October 12, 2006, and it is active in the NPI Registry.
What does Gary John Giesler specialize in?
Gary John Giesler is an optometrist in Ballwin, Missouri. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Gary John Giesler practice?
Gary Giesler practices at 15933 Clayton Rd, Ballwin, MO 63011. Gary Giesler's primary practice is Clarkson Eyecare in Ballwin, Missouri. Dmand AI also links Gary Giesler to 1 physician office.
What is Gary John Giesler's office phone number?
The practice phone on file for Gary Giesler is (636) 200-4393.
What is Gary John Giesler's medical license number?
Gary Giesler holds Missouri license TO2265.
Does Gary John Giesler accept Medicare?
Yes. CMS lists Gary Giesler as accepting Medicare assignment.
How many Medicare patients does Gary John Giesler see?
CMS counts 90 Medicare patients who saw Gary Giesler in 2024, with an average age of 74.
Where did Gary John Giesler go to medical school?
Gary Giesler graduated from University of Houston - College of Optometry in 1975.
How long has Gary John Giesler been practicing?
Gary Giesler graduated from medical school in 1975, 51 years ago.
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