William Sigmund, OD
NPI 1477449726 · Optometrist · O Fallon, MO
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Sigmund, OD is a Optometrist provider in O Fallon, MO (NPI 1477449726).
Provider details
- NPI number
- 1477449726
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- OD
- Sex
- Male
- Sole proprietor
- No
- License
- 2025022556 (MO)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
1 yr in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2025-06-14
- Last updated
- 2025-06-14
- Certified
- 2025-06-14
Frequently asked questions
- What is William Sigmund's NPI number?
- William Sigmund's National Provider Identifier (NPI) is 1477449726, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Sigmund's specialty?
- William Sigmund is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is William Sigmund located?
- William Sigmund's practice location on file with NPPES is 1140 Tom Ginnever Ave, O Fallon, MO 63366-4530.
- What is William Sigmund's phone number?
- The practice phone number listed in the NPPES registry for William Sigmund is (636) 272-1444.
- Does William Sigmund accept Medicare?
- William Sigmund is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Sigmund's NPI active?
- Yes — William Sigmund's NPI (1477449726) is active in the NPPES registry as of the last update on 2025-06-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.