LAZAROS XANTHOPOULOS MD
NPI 1255319604
Pediatrics in Leominster, MA
About Lazaros Xanthopoulos Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
LAZAROS XANTHOPOULOS MD (NPI 1255319604) is an individual pediatrics provider in Leominster, Massachusetts, licensed in Massachusetts (212832) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Lazaros Xanthopoulos Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
6Medicare enrollment records show Lazaros Xanthopoulos reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Worcester, MA 01655
- Reassigned Medicare billing, Massachusetts enrollment
- 2,902 clinicians in this Medicare group
Watertown, MA 02472
- Reassigned Medicare billing, Massachusetts enrollment
- 1,103 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts and New Hampshire enrollments
- 6,360 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,234 clinicians in this Medicare group
Exeter, NH 03833
- Reassigned Medicare billing, New Hampshire enrollment
- 395 clinicians in this Medicare group
Dover, NH 03820
- Reassigned Medicare billing, New Hampshire enrollment
- 559 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 01453 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.
LEOMINSTER, MA 01453
LEOMINSTER, MA 01453
LEOMINSTER, MA 01453
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 Lazaros Xanthopoulos's NPI number?
The NPI number for Lazaros Xanthopoulos is 1255319604. It was assigned to this individual provider in the NPPES registry on January 5, 2006.
Where is Lazaros Xanthopoulos located?
Lazaros Xanthopoulos practices at 60 Hospital Rd, Leominster, MA 01453. The listed phone number is (978) 466-2000.
What is Lazaros Xanthopoulos's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is Lazaros Xanthopoulos enrolled in Medicare?
Yes. Lazaros Xanthopoulos is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Lazaros Xanthopoulos's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Lazaros Xanthopoulos reassigns Medicare benefits to 6 organizations: Umass Memorial Medical Group Inc (Worcester, MA), Steward Medical Group, Inc (Watertown, MA), Massachusetts General Physicians Organization Inc (Boston, MA), The General Hospital Corporation (Boston, MA), Core Physicians, LLC (Exeter, NH) and 1 more organization, listed in the Medicare section above. 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 Lazaros Xanthopoulos's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Lazaros Xanthopoulos accept?
Health plans from Anthem Blue Cross and Blue Shield, Taro Health and WellSense Health Plan list Lazaros Xanthopoulos 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 Lazaros Xanthopoulos was last updated on October 27, 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.
# Lazaros Xanthopoulos, MD · NPI 1255319604
Pediatrics physician in Leominster, Massachusetts. Individual provider, active in the CMS NPPES registry since January 5, 2006.
## Identity
- **NPI:** 1255319604 (Entity type: Individual)
- **Enumerated:** January 5, 2006
- **Primary specialty:** Pediatrics · taxonomy 208000000X
- **State license:** 212832 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 60 HOSPITAL RD, Leominster, MA 01453-2205
- **Phone:** (978) 466-2000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 6 organizations under Medicare reassignment (form CMS-855R): Umass Memorial Medical Group Inc (NPI 1760445373, Worcester, MA); Steward Medical Group, Inc (NPI 1629398219, Watertown, MA); Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA); The General Hospital Corporation (NPI 1023049236, Boston, MA); Core Physicians, LLC (NPI 1336330588, Exeter, NH); and 1 more · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** October 27, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1255319604) · Data from the CMS NPPES public registry.