NPPES file of Aug 9, 2026

William Sigmund, OD

Optometrist · O Fallon, MO

William Sigmund, OD is an optometrist with a practice address in O Fallon, Missouri, and NPI 1477449726, issued on Jun 14, 2025. Check the license (Missouri 2025022556, as entered in NPPES) with the Missouri board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1477449726
Name
William Sigmund
Credential
OD
Primary taxonomy
Optometrist 152W00000X
License number
2025022556 MO
Self-reported in NPPES; status is on the state search
Practice location
1140 Tom Ginnever Ave, O Fallon, MO 63366
Phone
(636) 272-1444
Enumerated
Jun 14, 2025
Record last updated
Jun 14, 2025
Medicare enrollment
Enrolled (PECOS I20250730001037); accepts Medicare assignment
Medical or professional school
University Of Missouri St Louis - School Of Optometry, 2025
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
Download card Updates feed

8 nearest optometrist records → All 1,242 in Missouri → Look up another NPI →

Also registered at 1140 Tom Ginnever Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Erin Huie, ODOptometrist1487221339

Verify William Sigmund in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Missouri board licenses this profession
    Search for license 2025022556    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Missouri license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Is this page about you? You can ask us to correct, restrict or remove it: how.

Bills Medicare through one group practice

  1. Iverson-Tomasino Eyecare IncO Fallon, MO

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

William Sigmund among 1,242 optometrist records in Missouri

William Sigmund, OD is one of 1,242 optometrist records with a practice address in Missouri. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2025, is newer than 95% of them.

  • NPI issued2025 · 95% of these records are older, 2% newer
  • In a Medicare fileYes · 73% of these records are
  • In the CMS Doctors and Clinicians fileYes · 62% of these records are
  • Graduated2025 · median 2007 among the 768 with a school on file
  • Record last updated2025 · 67% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 152W00000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

26 optometrist records list a practice address in O Fallon

They are 26 of the 1,225 NPPES records with a practice address in O Fallon, and 1,242 optometrist records in Missouri.

All 1,242 in Missouri → Every provider in O Fallon → Optometrist nationwide →

The 8 optometrist records with the nearest ZIP codes

  1. Jasmine Chadha, ODO Fallon, MO 633661598115784
  2. Kevin Daugherty, ODO Fallon, MO 633661548150360
  3. Erin Huie, ODO Fallon, MO 633661487221339
  4. John Konopik, O.D.O Fallon, MO 633661760450696
  5. Jacqueline Ladd, O.D.O Fallon, MO 633661053751537
  6. Robert Rottler, O.D.O Fallon, MO 633661376549378
  7. Scott Tomasino, O.D.O Fallon, MO 633661124024906
  8. Gerald Birkmann, O.D.New Melle, MO 633651043251812

Common questions

What is William Sigmund, OD's NPI number?

William Sigmund, OD's National Provider Identifier (NPI) is 1477449726, issued on Jun 14, 2025. An NPI identifies a provider in billing; it is not a license.

Where is William Sigmund, OD located?

The NPPES record lists a practice address at 1140 Tom Ginnever Ave, O Fallon, MO, 63366. Phone: (636) 272-1444. Providers update this record themselves, so call before visiting.

How can I verify William Sigmund, OD's license?

NPPES lists Missouri license number 2025022556, as entered by the provider. Search the Missouri board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.