WALTHAM BEHAVIORAL HEALTH LLC
NPI 1427453000
Registered Nurse - Psychiatric/Mental Health, Adult in Waltham, MA
About Waltham Behavioral Health Llc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WALTHAM BEHAVIORAL HEALTH LLC (NPI 1427453000) is a healthcare organization registered as a psychiatric/mental health, adult in Waltham, Massachusetts and active in the NPI registry since October 2014. The organization lists Eleftheria Tsavoussis, Owner, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 7
Group Practice 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Waltham Behavioral Health Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
11Medicare enrollment records show 11 clinicians reassign Medicare billing to Waltham Behavioral Health LLC, which bills Medicare for the services they deliver. Of these, 2 practice at this address and 5 within 10 miles. They are listed nearest first.
Clinicians by Medicare Specialty 4
Clinicians, nearest first (11)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Waltham Behavioral Health LLC's NPI number?
The NPI number for Waltham Behavioral Health LLC is 1427453000. It was assigned to this organization in the NPPES registry on October 25, 2014.
Where is Waltham Behavioral Health LLC located?
Waltham Behavioral Health LLC is located at 210 Bear Hill Rd Suite 202, Waltham, MA 02451. The listed phone number is (781) 966-0070.
What is Waltham Behavioral Health LLC's specialty?
The primary specialty registered for this NPI is Registered Nurse, specializing in Psychiatric/Mental Health, Adult, with taxonomy code 163WP0809X.
Is Waltham Behavioral Health LLC enrolled in Medicare?
Yes. Waltham Behavioral Health LLC is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Waltham Behavioral Health LLC?
According to the CMS Revalidation Reassignment List (October 2026 release), 11 clinicians in 4 Medicare specialties reassign their Medicare billing to Waltham Behavioral Health LLC. A 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 the clinician's services. The largest specialties are Certified Clinical Nurse Specialist (CNS) (4), Clinical Social Worker (4) and Nurse Practitioner (2). Of these, 2 practice at this address and 5 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
What insurance does Waltham Behavioral Health LLC accept?
Health plans from Anthem Blue Cross and Blue Shield list Waltham Behavioral Health LLC as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Waltham Behavioral Health LLC was last updated on January 6, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Waltham Behavioral Health Llc · NPI 1427453000
Psychiatric/Mental Health, Adult organization in Waltham, Massachusetts. Organization record, active in the CMS NPPES registry since October 25, 2014.
## Identity
- **NPI:** 1427453000 (Entity type: Organization)
- **Enumerated:** October 25, 2014
- **Primary specialty:** Registered Nurse - Psychiatric/Mental Health, Adult · taxonomy 163WP0809X
- **Organization subpart:** No
- **Authorized official:** Eleftheria Tsavoussis, OWNER
## Practice location
- **Address:** 210 BEAR HILL RD, SUITE 202, Waltham, MA 02451-1025
- **Phone:** (781) 966-0070 · **Fax:** (781) 915-0755
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 11 clinicians in 4 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Certified Clinical Nurse Specialist (CNS) (4), Clinical Social Worker (4), Nurse Practitioner (2); 2 practice at this address and 5 within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** January 6, 2020
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Source: [NPI Profile](https://npiprofile.com/npi/1427453000) · Data from the CMS NPPES public registry.