Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John Grassam, D.C.

Chiropractor in Port St Lucie, FL · enumerated 2007 · practices at Disc Center of Port St Lucie LLC.

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

National Provider Identifier

1821293440

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Registry record

Entity type Individual (Type 1)

Name Dr. John Grassam

Credential D.C.

Sex Male

Practice address 555 Nw Lake Whitney Pl Ste 105, Port St Lucie, FL, 34986

Phone (772) 237-2080

Fax (772) 237-2086

Enumeration date Jun 15, 2007

Last updated in NPPES Dec 1, 2022

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License CH7964 (FL) Primary

DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC credential

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

What specialty is John Grassam?

John Grassam is registered in NPPES with the primary taxonomy of Chiropractor. 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.

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Disc Center of Port St Lucie LLC Chiropractor · Port St Lucie, FL NPI 1992421002

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-12-01.