Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. KATHRYN PORTNOW ED.D.
NPI 1639660053
Counselor - Mental Health in Maynard, MA

Q: What is Kathryn Portnow's NPI number?

The NPI number for Kathryn Portnow is 1639660053. It was assigned to this individual provider in the NPPES registry on May 21, 2018.

Q: What is Kathryn Portnow's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.

Q: When was this NPI record last updated?

The NPPES record for Kathryn Portnow was last updated on July 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 37 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since May 21, 2018

71 POWDER MILL RD, MAYNARD, MA 01754(781) 641-3089 Get Directions Write a Review

NPPES record last updated: July 2, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

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About Dr. Kathryn Portnow Ed.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. KATHRYN PORTNOW ED.D. (NPI 1639660053) is an individual mental health provider in Maynard, Massachusetts, licensed in Massachusetts (LMHC10006901) and active in the NPI registry since May 2018.

NPPES Registry Identity

NPI1639660053

Entity TypeIndividualFemale

Primary Taxonomy101YM0800X

Provider Legal NameDR. KATHRYN PORTNOWCredential: ED.D.

Location Address71 POWDER MILL RDMaynard, MA 01754-1410

Mailing Address71 Powder Mill RdMaynard, MA 01754-1410

Phone(781) 641-3089

Sole ProprietorYes

Enumeration DateMay 21, 2018

Last NPPES UpdateJuly 2, 2026

NPPES CertifiedJuly 2, 2026

✔ NPI 1639660053 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyCounselor · Mental HealthBehavioral Health & Social Service Providers

Taxonomy Code101YM0800X

License✔ Licensed in MA · LMHC10006901

Also ListedPsychologistTaxonomy 103T00000X · License PY8188 (MA)

71 POWDER MILL RD, Maynard, MA 01754

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Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Kathryn Portnow's NPI number?

The NPI number for Kathryn Portnow is 1639660053. It was assigned to this individual provider in the NPPES registry on May 21, 2018.

Where is Kathryn Portnow located?

Kathryn Portnow practices at 71 Powder Mill Rd, Maynard, MA 01754. The listed phone number is (781) 641-3089.

What is Kathryn Portnow's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.

When was this NPI record last updated?

The NPPES record for Kathryn Portnow was last updated on July 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 37 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.