Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Mountainside Fitness Acquisitions, LLC

Sports Medicine (Physical Medicine & Rehabilitation) Physician in Mesa, AZ · enumerated 2021 · authorized official Eileen Ahern, Credentialist.

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

National Provider Identifier

1265021794

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Registry record

Entity type Organization (Type 2)

Legal business name Mountainside Fitness Acquisitions, LLC

Practice address 1253 N Greenfield Rd, Mesa, AZ, 85205

Phone (480) 889-1865

Enumeration date Jan 11, 2021

Last updated in NPPES Jan 11, 2021

Taxonomy & classification

2081S0010X Sports Medicine (Physical Medicine & Rehabilitation) Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Eileen Ahern

Title Credentialist

Phone (800) 954-1800

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

Where is Mountainside Fitness Acquisitions, LLC located?

The practice location on file with NPPES is in Mesa, AZ.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2021-01-11. Verify at npiregistry.cms.hhs.gov.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-01-11.