What is Leslie Wiss's NPI number?

Leslie Wiss's National Provider Identifier (NPI) is 1225340300, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Leslie Wiss's specialty?

Leslie Wiss is listed in the NPPES registry with a primary specialty of Counselor (Behavioral Health & Social Service Providers).

Where is Leslie Wiss located?

Leslie Wiss's practice location on file with NPPES is 1555 Tea Party Ln, O Fallon, MO 63366-5519.

What is Leslie Wiss's phone number?

The practice phone number listed in the NPPES registry for Leslie Wiss is (314) 458-3836.

Is Leslie Wiss's NPI active?

Yes — Leslie Wiss's NPI (1225340300) is active in the NPPES registry as of the last update on 2025-10-09.

IndividualActive

Leslie Wiss, MA, LPC

NPI 1225340300 · Counselor · O Fallon, MO

Leslie Wiss, MA, LPC is a Counselor provider in O Fallon, MO (NPI 1225340300).

Provider details

NPI number: 1225340300
Entity type: Individual
Primary specialty: CounselorBehavioral Health & Social Service Providers
Credential: MA, LPC
Sex: Female
Sole proprietor: Yes
License: 2010017636 (MO)

Specialties & taxonomies

CounselorPrimary101Y00000XLicense 2010017636 (MO)
Behavioral Health & Social Service Providers

Profile Score

Detailed profile(83/100 index)

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

Registry tenure38% of score
15 yrs in NPPES 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

1555 Tea Party Ln

O Fallon, MO 63366-5519

Phone: (314) 458-3836

Street-level locationGet directions

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Mailing address