What is Clare O'Sullivan's NPI number?

Clare O'Sullivan's National Provider Identifier (NPI) is 1922663442, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Clare O'Sullivan's specialty?

Clare O'Sullivan is listed in the NPPES registry with a primary specialty of Behavior Analyst (Behavioral Health & Social Service Providers).

Where is Clare O'Sullivan located?

Clare O'Sullivan's practice location on file with NPPES is 310 N Loomis St, Chicago, IL 60607-1147.

What is Clare O'Sullivan's phone number?

The practice phone number listed in the NPPES registry for Clare O'Sullivan is (312) 243-8487.

Is Clare O'Sullivan's NPI active?

Yes — Clare O'Sullivan's NPI (1922663442) is active in the NPPES registry as of the last update on 2026-04-27.

IndividualActive

Clare O'Sullivan

NPI 1922663442 · Behavior Analyst · Chicago, IL

Clare O'Sullivan is a Behavior Analyst provider in Chicago, IL (NPI 1922663442).

Provider details

NPI number: 1922663442
Entity type: Individual
Primary specialty: Behavior AnalystBehavioral Health & Social Service Providers
Sex: Female
Sole proprietor: Yes
License: 1-22-58755 (TX)

Specialties & taxonomies

Behavior AnalystPrimary103K00000XLicense 1-22-58755 (TX)
Behavioral Health & Social Service Providers

Profile Score

Established profile(66/100 index)

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

Registry tenure38% of score
7 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

310 N Loomis St

Chicago, IL 60607-1147

Phone: (312) 243-8487

Street-level locationGet directions

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Mailing address