Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

April C Callahan, MS, RD, CDE

Registered Dietitian in Phoenix, AZ · enumerated 2012.

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

National Provider Identifier

1841542776

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name April C Callahan

Credential MS, RD, CDE

Sex Female

Practice address 1919 E Thomas Rd, Phoenix, AZ, 85016

Phone (602) 933-0935

Fax (602) 933-0610

Enumeration date Oct 2, 2012

Last updated in NPPES Jun 23, 2017

Taxonomy & licenses

133V00000X Registered Dietitian Dietary & Nutritional Service Providers · License 679028 (AZ) Primary

RD · Registered Dietitian: A nutrition professional credentialed by the Commission on Dietetic Registration. About the RD 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 specialty is April Callahan?

April Callahan is registered in NPPES with the primary taxonomy of Registered Dietitian. 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.

Other providers at this practice address

Browse all →

Mehrdad Shafa Pediatric Emergency Medicine (Emergency Medicine) Physician · Phoenix, AZ NPI 1750387171 Phoenix Children'S Hospital Children's Hospital · Phoenix, AZ NPI 1760480503 Thomas Gross Pediatric Hematology & Oncology Physician · Phoenix, AZ NPI 1285636258 Anastasia Gentles Pediatrics Physician · Phoenix, AZ NPI 1356343875 Gregory White Pediatric Orthopaedic Surgery Physician · Phoenix, AZ NPI 1740272798 Todd Abruzzo Neurological Surgery Physician · Phoenix, AZ NPI 1407848377 Pranav Patel Neonatal-Perinatal Medicine Physician · Phoenix, AZ NPI 1356333660 Dianna Bardo Diagnostic Radiology Physician · Phoenix, AZ NPI 1881686111

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-06-23.