Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
David P Larsen, OD
Optometrist in Tomah, WI · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1417953308
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Registry record
Entity type Individual (Type 1)
Name David P Larsen
Credential OD
Sex Male
Practice address 1330 N Superior Ave, Tomah, WI, 54660
Phone (608) 372-4458
Enumeration date Jun 24, 2005
Last updated in NPPES Jan 21, 2016
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 38581400 | Medicaid | WI | - |
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.
Frequently asked questions
What specialty is David Larsen?
David Larsen is registered in NPPES with the primary taxonomy of Optometrist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
Other providers at this practice address
Browse all → Glenna Olson Medical Physician Assistant · Tomah, WI NPI 1588668024 Mark Steging Surgical Physician Assistant · Tomah, WI NPI 1477558831 Jill Mcmullen Family Medicine Physician · Tomah, WI NPI 1740285998 Rick Erdman Internal Medicine Physician · Tomah, WI NPI 1952306011 Nancy Heerens-Knudson Medical Physician Assistant · Tomah, WI NPI 1932104478 Ralph Knudson Family Medicine Physician · Tomah, WI NPI 1205832557 Joan Kortbein Registered Dietitian · Tomah, WI NPI 1245236538 Kelly Hodgson-Kline Pediatrics Physician · Tomah, WI NPI 1508862699
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-01-21.