Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Steven L Alder, MD

Q: What is the NPI number for Steven Alder?

The National Provider Identifier (NPI) for Steven Alder is 1164402582, a Type 1 (individual) record in the CMS NPPES registry.

Anatomic Pathology & Clinical Pathology Physician in Phoenix, AZ · enumerated 2006 · practices at Pathology Specialist of Arizona, LLP.

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

National Provider Identifier

1164402582

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Registry record

Entity type Individual (Type 1)

Name Dr. Steven L Alder

Credential MD

Sex Male

Practice address 424 S 56th St Ste 120, Phoenix, AZ, 85034

Phone (602) 685-5211

Fax (602) 685-5325

Enumeration date Jan 20, 2006

Last updated in NPPES Aug 4, 2020

Taxonomy & licenses

207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License 26140 (AZ) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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 Steven Alder?

The National Provider Identifier (NPI) for Steven Alder is 1164402582, a Type 1 (individual) record in the CMS NPPES registry.

Where does Steven Alder practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-04.