What is Isabella Kirwin's NPI number?

Isabella Kirwin's National Provider Identifier (NPI) is 1164381133, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Isabella Kirwin's specialty?

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

Where is Isabella Kirwin located?

Isabella Kirwin's practice location on file with NPPES is 125 Hartwell Ave, Lexington, MA 02421-3100.

What is Isabella Kirwin's phone number?

The practice phone number listed in the NPPES registry for Isabella Kirwin is (781) 861-0890.

Is Isabella Kirwin's NPI active?

Yes — Isabella Kirwin's NPI (1164381133) is active in the NPPES registry as of the last update on 2026-01-16.

IndividualActive

Isabella Kirwin

NPI 1164381133 · Mental Health Counselor · Lexington, MA

Isabella Kirwin is a Mental Health Counselor provider in Lexington, MA (NPI 1164381133).

Provider details

NPI number: 1164381133
Entity type: Individual
Primary specialty: Mental Health CounselorBehavioral Health & Social Service Providers
Sex: Female
Sole proprietor: Yes

Specialties & taxonomies

Mental Health CounselorPrimary101YM0800X
Behavioral Health & Social Service Providers

Profile Score

Basic profile(47/100 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
83% 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

125 Hartwell Ave

Lexington, MA 02421-3100

Phone: (781) 861-0890

Street-level locationGet directions

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Mailing address