Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Joann F. Hamm, O.D., P.C.

Optometrist in Arlington Heights, IL · enumerated 2014 · authorized official Joann Hamm, Owner/Optometrist.

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

National Provider Identifier

1255751251

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Registry record

Entity type Organization (Type 2)

Legal business name Joann F. Hamm, O.D., P.C.

Practice address 1504 N. Arlington Heights Rd., Arlington Heights, IL, 60004

Phone (847) 255-9922

Fax (847) 255-8699

Enumeration date Apr 17, 2014

Last updated in NPPES Apr 17, 2014

Taxonomy & classification

152W00000X Optometrist Eye and Vision Services Providers · License 046-007257 (IL) Primary

Authorized official

Name Joann Hamm

Title Owner/Optometrist

Phone (847) 255-9922

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

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2014-04-17. Verify at npiregistry.cms.hhs.gov.

Where is Joann F. Hamm, O.D., P.C. located?

The practice location on file with NPPES is in Arlington Heights, IL.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-04-17.