Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Melissa Ann Johnston, PA-C

Physician Assistant in Addison, TX · enumerated 2020.

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

National Provider Identifier

1245863554

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Registry record

Entity type Individual (Type 1)

Name Melissa Ann Johnston

Credential PA-C

Sex Female

Practice address 17051 Dallas Pkwy Ste 400, Addison, TX, 75001

Phone (214) 370-3535

Fax (214) 370-0004

Enumeration date Feb 14, 2020

Last updated in NPPES May 23, 2025

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers Primary

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 specialty is Melissa Johnston?

Melissa Johnston is registered in NPPES with the primary taxonomy of Physician Assistant. 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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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-05-23.