1. Home
  2. Directory
  3. Massachusetts
  4. Cambridge
  5. Psychiatry Neurology
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. ALEXANDRA HARRISON MD
NPI 1568446706
Psychiatry & Neurology - Child & Adolescent Psychiatry in Cambridge, MA

Active since December 01, 2005Opted out of Medicare · through Jun 13, 2028
183 BRATTLE ST, CAMBRIDGE, MA 02138(617) 576-1330 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 23, 2026.

Record update history: Jul 13, 2026, Sep 11, 2025 (2 updates tracked since 2025).

About Dr. Alexandra Harrison Md NPPES

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

DR. ALEXANDRA HARRISON MD (NPI 1568446706) is an individual child & adolescent psychiatry provider in Cambridge, Massachusetts, licensed in Massachusetts (34629) and active in the NPI registry since December 2005. She has opted out of Medicare through June 13, 2028 and remains eligible to order and refer.

NPPES Registry Identity

NPI1568446706
Entity TypeIndividualFemale
Primary Taxonomy2084P0804X
Provider Legal NameDR. ALEXANDRA HARRISONCredential: MD
Location Address183 BRATTLE STCambridge, MA 02138
Mailing Address183 Brattle StCambridge, MA 02138 · (617) 576-1330
Phone(617) 576-1330
Sole ProprietorNo
Enumeration DateDecember 1, 2005
Last NPPES UpdateJuly 13, 20262 updates tracked since enumeration
✔ NPI 1568446706 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychiatry & Neurology · Child & Adolescent PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0804X
License✔ Licensed in MA · 34629
Definition
Child & Adolescent Psychiatry is a subspecialty of psychiatry with additional skills and training in the diagnosis and treatment of developmental, behavioral, emotional, and mental disorders of childhood and adolescence.
Also ListedPsychiatry & Neurology · PsychiatryTaxonomy 2084P0800X · License 34629 (MA)
183 BRATTLE ST, Cambridge, MA 02138
Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Dr. Alexandra Harrison Md has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from June 13, 2016 through June 13, 2028.

Opt-Out Effective DateJune 13, 2016
Opt-Out In Effect ThroughJune 13, 2028Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

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 Alexandra Harrison's NPI number?

The NPI number for Alexandra Harrison is 1568446706. It was assigned to this individual provider in the NPPES registry on December 1, 2005.

Where is Alexandra Harrison located?

Alexandra Harrison practices at 183 Brattle St, Cambridge, MA 02138. The listed phone number is (617) 576-1330.

What is Alexandra Harrison's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Child & Adolescent Psychiatry, with taxonomy code 2084P0804X.

Is Alexandra Harrison enrolled in Medicare?

No. Alexandra Harrison has opted out of Medicare through June 13, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Alexandra Harrison was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 43 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.