MR. STEVEN ZESSIS LICSW
NPI 1255612503
Social Worker - Clinical in Lowell, MA
About Mr. Steven Zessis Licsw NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MR. STEVEN ZESSIS LICSW (NPI 1255612503) is an individual clinical provider in Lowell, Massachusetts, licensed in Massachusetts (111800) and active in the NPI registry since August 2011. He is enrolled in Medicare PECOS and is a graduate of Other (1997).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Mr. Steven Zessis Licsw is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Steven Zessis reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Andover, MA 01810
- Reassigned Medicare billing, Massachusetts enrollment
- Medicare enrollment name: Optum Behavioral Care Of Connecticut PC
- 68 clinicians in this Medicare group
North Andover, MA 01845
- Reassigned Medicare billing, Massachusetts enrollment
- 36 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01852 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LOWELL, MA 01852
LOWELL, MA 01852
LOWELL, MA 01852
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 Steven Zessis's NPI number?
The NPI number for Steven Zessis is 1255612503. It was assigned to this individual provider in the NPPES registry on August 31, 2011.
Where is Steven Zessis located?
Steven Zessis practices at 126 Phoenix Ave 3rd Floor, Lowell, MA 01852. The listed phone number is (978) 513-2393.
What is Steven Zessis's specialty?
The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.
Is Steven Zessis enrolled in Medicare?
Yes. Steven Zessis is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Steven Zessis's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Steven Zessis reassigns Medicare benefits to 2 organizations: Optum Behavioral Care Of Connecticut, P.C. (Andover, MA) and Integrated Behavioral Care New England LLC (North Andover, MA). 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 Steven Zessis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Steven Zessis accept?
Health plans from Harvard Pilgrim Health Care and Taro Health list Steven Zessis 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 Steven Zessis was last updated on August 31, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.
# Mr. Steven Zessis, LICSW · NPI 1255612503
Clinical provider in Lowell, Massachusetts. Individual provider, active in the CMS NPPES registry since August 31, 2011.
## Identity
- **NPI:** 1255612503 (Entity type: Individual)
- **Enumerated:** August 31, 2011
- **Primary specialty:** Social Worker - Clinical · taxonomy 1041C0700X
- **State license:** 111800 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 126 PHOENIX AVE, 3RD FLOOR, Lowell, MA 01852-4931
- **Phone:** (978) 513-2393
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Optum Behavioral Care Of Connecticut, P.C. (NPI 1023801230, Andover, MA); Integrated Behavioral Care New England LLC (NPI 1053185272, North Andover, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1997
## Record status
- **NPPES last updated:** August 31, 2011
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Source: [NPI Profile](https://npiprofile.com/npi/1255612503) · Data from the CMS NPPES public registry.