Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

William G Towler

Optician in Billings, MT · enumerated 2006 · practices at Jessica L Peel Od Pllc.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1437231792

Verified

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Registry record

Entity type Individual (Type 1)

Name William G Towler

Sex Male

Practice address Billings, MT, 59102

Phone (406) 256-5952

Fax (406) 256-3837

Enumeration date Oct 19, 2006

Last updated in NPPES Jan 28, 2008

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

156FX1700X Ocularist Eye and Vision Services Providers Secondary

156FX1800X Optician Eye and Vision Services Providers Primary

Other identifiers

Identifier	Type	State	Issuer
550849	Medicaid	MT	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for William Towler?

The National Provider Identifier (NPI) for William Towler is 1437231792, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Towler practice?

The practice location on file with NPPES is in Billings, MT. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Jessica L Peel Od Pllc Optometrist · Billings, MT NPI 1801037916

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-01-28.