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

Dr. Karl Robert Erdmann, O.D.

Optometrist in Exeter, NH · enumerated 2005 · practices at Mayo Family Eye Care, LLC.

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

National Provider Identifier

1679567689

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Registry record

Entity type Individual (Type 1)

Name Dr. Karl Robert Erdmann

Credential O.D.

Sex Male

Practice address Exeter, NH, 03833

Phone (603) 778-7145

Fax (603) 778-4670

Enumeration date Sep 6, 2005

Last updated in NPPES Jan 29, 2008

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

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 392 (NH) Primary

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
80582283	Medicaid	NH	-

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.

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Frequently asked questions

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.

What specialty is Karl Erdmann?

Karl Erdmann 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.

Other providers at this practice address

Browse all →

Mayo Family Eye Care, LLC Optometrist · Exeter, NH NPI 1598113227 Sabrina Mayo Optometrist · Exeter, NH NPI 1639527369

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-01-29.