Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Valley of the Sun Institute for Pain Management, Pllc

Physical Medicine & Rehabilitation Physician in Scottsdale, AZ · enumerated 2017 · authorized official Estelle Farrell, Owner/Physician.

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

National Provider Identifier

1275048316

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Registry record

Entity type Organization (Type 2)

Legal business name Valley of the Sun Institute for Pain Management, Pllc

Other name <Unavail>

Practice address 4921 E Bell Rd Ste 203, Scottsdale, AZ, 85254

Phone (480) 955-1515

Fax (844) 287-5554

Enumeration date Dec 12, 2017

Last updated in NPPES Aug 18, 2022

Taxonomy & classification

208100000X Physical Medicine & Rehabilitation Physician Allopathic & Osteopathic Physicians Primary

261QM1300X Multi-Specialty Clinic/Center Ambulatory Health Care Facilities Secondary

261QP3300X Pain Clinic/Center Ambulatory Health Care Facilities Secondary

261QR0400X Rehabilitation Clinic/Center Ambulatory Health Care Facilities Secondary

Authorized official

Name Estelle Farrell

Title Owner/Physician

Phone (480) 955-1515

Other identifiers

Identifier	Type	State	Issuer
449216	Medicaid	AZ	-
3223	Other	AZ	STATE LICENSE

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 a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

What type of organization is Valley of the Sun Institute for Pain Management, Pllc?

Valley of the Sun Institute for Pain Management, Pllc is registered in NPPES as a Physical Medicine & Rehabilitation Physician (its primary provider taxonomy).

Providers at this address

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Estelle Farrell Physical Medicine & Rehabilitation Physician · Scottsdale, AZ NPI 1174614622 Melanie B Alarcio, MD, Pllc Neurology with Special Qualifications in Child Neurology Physician · Scottsdale, AZ NPI 1356892202

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-08-18.