What is Abby Muehlstein's NPI number?

Abby Muehlstein's National Provider Identifier (NPI) is 1104701721, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Abby Muehlstein's specialty?

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

Where is Abby Muehlstein located?

Abby Muehlstein's practice location on file with NPPES is 300 Longwood Ave, Boston, MA 02115-5724.

What is Abby Muehlstein's phone number?

The practice phone number listed in the NPPES registry for Abby Muehlstein is (617) 355-6000.

Is Abby Muehlstein's NPI active?

Yes — Abby Muehlstein's NPI (1104701721) is active in the NPPES registry as of the last update on 2025-08-11.

IndividualActive

Abby Muehlstein, LCSW

NPI 1104701721 · Social Worker · Boston, MA

Abby Muehlstein, LCSW is a Social Worker provider in Boston, MA (NPI 1104701721).

Provider details

NPI number: 1104701721
Entity type: Individual
Primary specialty: Social WorkerBehavioral Health & Social Service Providers
Credential: LCSW
Sex: Female
Sole proprietor: No
License: LCSW2120188 (MA)

Specialties & taxonomies

Social WorkerPrimary104100000XLicense LCSW2120188 (MA)
Behavioral Health & Social Service Providers

Profile Score

Established profile(54/100 index)

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

Registry tenure38% of score
1 yr 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

300 Longwood Ave

Boston, MA 02115-5724

Phone: (617) 355-6000

Street-level locationGet directions

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Mailing address