Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. John Pierre Arross Jr., R.PH.

Q: What is the NPI number for John Arross?

The National Provider Identifier (NPI) for John Arross is 1588654420, a Type 1 (individual) record in the CMS NPPES registry.

Pharmacist in Casper, WY · enumerated 2005.

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

National Provider Identifier

1588654420

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Registry record

Entity type Individual (Type 1)

Name Mr. John Pierre Arross Jr.

Credential R.PH.

Sex Male

Practice address 1233 E 2nd St, Casper, WY, 82601

Phone (307) 577-2890

Enumeration date Oct 23, 2005

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 2683 (WY) Primary

RPH · Registered Pharmacist: A licensed pharmacist registered with a state board of pharmacy. About the RPH 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for John Arross?

The National Provider Identifier (NPI) for John Arross is 1588654420, a Type 1 (individual) record in the CMS NPPES registry.

Where does John Arross practice?

The practice location on file with NPPES is in Casper, WY. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Agatha Graham Pharmacotherapy Pharmacist · Casper, WY NPI 1659377588 Anita Stinson Anatomic Pathology & Clinical Pathology Physician · Casper, WY NPI 1942209200 Daniel Sullivan Anatomic Pathology & Clinical Pathology Physician · Casper, WY NPI 1982603122 Donald Smith Critical Care Medicine (Internal Medicine) Physician · Casper, WY NPI 1457338485 Dustin Roberts Anesthesiology Physician · Casper, WY NPI 1326018771 David Baxter Anesthesiology Physician · Casper, WY NPI 1861450801 George Carmen Emergency Medicine Physician · Casper, WY NPI 1760403638 Ronald Iverson Emergency Medicine Physician · Casper, WY NPI 1750302634

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.