William Sigmund, OD
- Industry payments
- $42
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2025
- Practice address
- 1140 Tom Ginnever Ave, O Fallon, MO 63366
- Practice phone
- Call (636) 272-1444
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Iverson-Tomasino Eyecare Inc
O Fallon, Missouri
Find William Sigmund'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.
William Sigmund is an optometrist in O Fallon, Missouri
William Sigmund practices at Iverson-Tomasino Eyecare Inc in O Fallon, Missouri.
William Sigmund's NPI, 1477449726, was assigned on June 14, 2025. William Sigmund graduated from University of Missouri St Louis - School of Optometry in 2025. William Sigmund holds Missouri license 2025022556.
- NPI
- 1477449726NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3779090170
- NPI enumeration date
- June 14, 2025
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (636) 272-1444
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 27
- Medical school graduation
- 2025
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
William Sigmund practices at Iverson-Tomasino Eyecare Inc in O Fallon, Missouri
William Sigmund's primary practice is Iverson-Tomasino Eyecare Inc, at 1140 Tom Ginnever Ave, O Fallon, MO 63366 in Saint Charles County. The practice phone is (636) 272-1444.
- Iverson-Tomasino Eyecare Inc1140 Tom Ginnever Ave, O Fallon, MO 63366 · Saint Charles CountyPhone(636) 272-1444
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
William Sigmund is affiliated with 2 sites of care and 1 medical group
William Sigmund's primary practice is Iverson-Tomasino Eyecare Inc in O Fallon, Missouri. Dmand AI also links William Sigmund 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 William Sigmund's practice
Dmand AI tracks the electronic health record (EHR) system at each site where William Sigmund practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Iverson-Tomasino Eyecare Inc | 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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William Sigmund is one of 866 optometrists in Missouri
Optometrist is William Sigmund's primary specialty in the NPI Registry, under taxonomy code 152W00000X. William Sigmund is licensed in Missouri.
Specialties and state licenses
- Optometrist, MissouriPrimary
Optometrists near William Sigmund
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
William Sigmund's patients have a median age of 66
Across all payers, Dmand AI patient panel data puts William Sigmund's median patient age at 66, with 50% women.
William Sigmund's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
How William Sigmund takes part in Medicare
William Sigmund 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)
William Sigmund received $42 in industry payments in 2025
CMS Open Payments shows 2 general payments to William Sigmund from 2 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Tarsus Pharmaceuticals, Inc. paid the most, $25.
Companies that paid William Sigmund the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
William Sigmund graduated from University of Missouri St Louis - School of Optometry
William Sigmund graduated from University of Missouri St Louis - School of Optometry in 2025.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for William Sigmund'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 Data |
| 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 William Sigmund
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is William Sigmund's NPI number?
William Sigmund's NPI number is 1477449726. It was assigned on June 14, 2025, and it is active in the NPI Registry.
What does William Sigmund specialize in?
William Sigmund is an optometrist in O Fallon, Missouri. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does William Sigmund practice?
William Sigmund practices at 1140 Tom Ginnever Ave, O Fallon, MO 63366. William Sigmund's primary practice is Iverson-Tomasino Eyecare Inc in O Fallon, Missouri. Dmand AI also links William Sigmund to 1 group practice or clinic and 1 medical group.
What is William Sigmund's office phone number?
The practice phone on file for William Sigmund is (636) 272-1444.
What is William Sigmund's medical license number?
William Sigmund holds Missouri license 2025022556.
Does William Sigmund accept Medicare?
Yes. CMS lists William Sigmund as accepting Medicare assignment.
Where did William Sigmund go to medical school?
William Sigmund graduated from University of Missouri St Louis - School of Optometry in 2025.
Has William Sigmund received payments from drug or device companies?
CMS Open Payments shows $42 in general payments to William Sigmund from 2 companies from 2025 to 2025. The largest total came from Tarsus Pharmaceuticals, Inc.
How long has William Sigmund been practicing?
William Sigmund graduated from medical school in 2025, 1 years ago.
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