What is Nicholas Leth's NPI number?

Nicholas Leth's National Provider Identifier (NPI) is 1851259147, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Nicholas Leth's specialty?

Nicholas Leth is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).

Where is Nicholas Leth located?

Nicholas Leth's practice location on file with NPPES is 1028 Randolph St, Oak Park, IL 60302-5514.

What is Nicholas Leth's phone number?

The practice phone number listed in the NPPES registry for Nicholas Leth is (708) 263-5279.

Is Nicholas Leth's NPI active?

Yes — Nicholas Leth's NPI (1851259147) is active in the NPPES registry as of the last update on 2026-01-14.

IndividualActive

Nicholas Leth

NPI 1851259147 · Clinical Social Worker · Oak Park, IL

Nicholas Leth is a Clinical Social Worker provider in Oak Park, IL (NPI 1851259147).

Provider details

NPI number: 1851259147
Entity type: Individual
Primary specialty: Clinical Social WorkerBehavioral Health & Social Service Providers
Sex: Male
Sole proprietor: Yes
License: 149.029100 (IL)

Specialties & taxonomies

Clinical Social WorkerPrimary1041C0700XLicense 149.029100 (IL)
Behavioral Health & Social Service Providers

Profile Score

Established profile(53/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
Under 1 yr in registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
1 documented practice location

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Practice location

1028 Randolph St

Oak Park, IL 60302-5514

Phone: (708) 263-5279

Street-level locationGet directions

More IL providers

Mailing address