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Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

HOLLY HERZFELD, LLC
NPI 1558270215
Counselor - Mental Health in Portland, ME

Active since September 07, 2026
57 EXCHANGE ST STE 203, PORTLAND, ME 04101(202) 834-0688 Get Directions Write a Review

NPPES record added: September 7, 2026. Verified against the NPPES registry weekly; last sync: September 13, 2026.

About Holly Herzfeld, Llc NPPES

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

HOLLY HERZFELD, LLC (NPI 1558270215) is a healthcare organization registered as a mental health in Portland, Maine and active in the NPI registry since September 2026. The organization lists Holly Herzfeld, Owner, as its authorized official.

NPPES Registry Identity

NPI1558270215
Entity TypeOrganization
Primary Taxonomy101YM0800X
Legal Business NameHOLLY HERZFELD, LLC
Location Address57 EXCHANGE ST STE 203Portland, ME 04101-5000
Mailing Address150 Eastern PromenadePortland, ME 04101-4423
Phone(202) 834-0688
Organization SubpartNo
Authorized OfficialHolly HerzfeldOwner · (202) 834-0688
Enumeration DateSeptember 7, 2026
NPPES CertifiedSeptember 7, 2026
✔ NPI 1558270215 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Mental HealthBehavioral Health & Social Service Providers
Taxonomy Code101YM0800X
57 EXCHANGE ST STE 203, Portland, ME 04101
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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Other Providers at the Same Location NPPES 16

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DANI FAZIO PSYCHOTHERAPY LLC
Clinic/Center (Adult Mental Health)
57 EXCHANGE ST STE 203
PORTLAND, ME 04101
Cumberland County (207) 618-6588
NOAH DANIEL KRELL LCSW
Social Worker (Clinical)
57 EXCHANGE ST STE 203
PORTLAND, ME 04101
Cumberland County (207) 417-6260
NOAH KRELL PSYCHOTHERAPY, LLC
Clinic/Center (Adult Mental Health)
57 EXCHANGE ST STE 203
PORTLAND, ME 04101
Cumberland County (207) 417-6260
ABBY ARSIS PSYCHOTHERAPY SERVICES LLC
Marriage & Family Therapist
57 EXCHANGE ST STE 203
PORTLAND, ME 04101
Cumberland County (703) 375-9234
PATRICIA DUFFETT LCSW
Social Worker (Clinical)
57 EXCHANGE ST STE 203
PORTLAND, ME 04101
Cumberland County (207) 200-3618
NATALIE BORNSTEIN PSYCHOTHERAPY LLC
Social Worker (Clinical)
57 EXCHANGE ST STE 203
PORTLAND, ME 04101
Cumberland County (207) 798-0963
JO PSYCHOTHERAPY LLC
Social Worker (Clinical)
57 EXCHANGE ST STE 203
PORTLAND, ME 04101
Cumberland County (207) 200-3229
KAITLIN ALBERTO PSYCHOTHERAPY LLC
Counselor (Professional)
57 EXCHANGE ST STE 203
PORTLAND, ME 04101
Cumberland County (617) 913-1795

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 Holly Herzfeld, LLC's NPI number?

The NPI number for Holly Herzfeld, LLC is 1558270215. It was assigned to this organization in the NPPES registry on September 7, 2026.

Where is Holly Herzfeld, LLC located?

Holly Herzfeld, LLC is located at 57 Exchange St Ste 203, Portland, ME 04101. The listed phone number is (202) 834-0688.

What is Holly Herzfeld, LLC'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 Holly Herzfeld, LLC was last updated on September 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.