173F00000X — Sleep Specialist (PhD)

173F00000X is the NUCC provider taxonomy code for Sleep Specialist (PhD) (individual providers). 130 providers in our latest NPPES snapshot list it as their primary taxonomy.

Taxonomy code	173F00000X
Display name	Sleep Specialist (PhD)
Grouping	Other Service Providers
Classification	Sleep Specialist, PhD
Section	Individual
Directory	Sleep Specialist, PhD provider directory

Definition

Sleep medicine is a clinical specialty with a focus on clinical problems that require accurate diagnosis and treatment. The knowledge base of sleep medicine is derived from many disciplines including neuroanatomy, neurophysiology, respiratory physiology, pharmacology, psychology, psychiatry, neurology, general internal medicine, pulmonary medicine, and pediatrics as well as others.

Definition from the NUCC Health Care Provider Taxonomy code set.

Related taxonomy codes

Frequently asked questions

What does taxonomy code 173F00000X mean?

173F00000X is the NUCC Health Care Provider Taxonomy code for Sleep Specialist (PhD) in the "Other Service Providers" grouping. It classifies individual providers.

Where is the taxonomy code used?

Providers select a taxonomy code when applying for an NPI, and it appears on insurance claims (CMS-1500 box 33b / 837 electronic claims) to identify the provider's classification. Payers may require the taxonomy that matches your credential and license.

How do I find providers with taxonomy 173F00000X?

Browse the Sleep Specialist, PhD directory, or use the NPI search and filter by state.

Source: CMS NPPES (public data). Snapshot 2026-07-09.