DR. KATHERINE LOU PSY.D.
NPI 1285085159
Psychologist in Boston, MA
About Dr. Katherine Lou Psy.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. KATHERINE LOU PSY.D. (NPI 1285085159) is an individual psychologist in Boston, Massachusetts, licensed in Massachusetts (10493) and active in the NPI registry since June 2016. She is enrolled in Medicare PECOS and is a graduate of Other (2015).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Katherine Lou Psy.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Katherine Lou reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02116
- Reassigned Medicare billing, Massachusetts enrollment
Elk Grove, CA 95624
- Reassigned Medicare billing, California enrollment
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Other Providers at the Same Location NPPES 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BOSTON, MA 02116
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 Katherine Lou's NPI number?
The NPI number for Katherine Lou is 1285085159. It was assigned to this individual provider in the NPPES registry on June 22, 2016.
Where is Katherine Lou located?
Katherine Lou practices at 75 Arlington St Fl 5, Boston, MA 02116. The listed phone number is (617) 366-2550.
What is Katherine Lou's specialty?
The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.
Is Katherine Lou enrolled in Medicare?
Yes. Katherine Lou is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Katherine Lou's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Katherine Lou reassigns Medicare benefits to 2 organizations: Relatespace LLC (Boston, MA) and Relatespace Psychotherapy PC (Elk Grove, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Katherine Lou's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Katherine Lou was last updated on January 9, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years 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.