WILLIAM ANTHONY CHARINI M.D.
NPI 1265505499
Internal Medicine - Infectious Disease in Lawrence, MA
About William Anthony Charini M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM ANTHONY CHARINI M.D. (NPI 1265505499) is an individual infectious disease provider in Lawrence, Massachusetts, licensed in Massachusetts (150270) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS, is affiliated with North Shore Medical Center -, and is a graduate of University Of California, Irvine, California College Of Medicine (1993).
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
William Anthony Charini M.d. 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 Reassignment
Medicare enrollment records show William Charini reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Salem, MA 01970
- Reassigned Medicare billing, Massachusetts enrollment
- 994 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.
Areas of Expertise CMS Part B claims 7
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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
North Shore Medical Center -
Acute Care Hospitals · Salem, MAMassachusetts General Hospital
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01841 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.
LAWRENCE, MA 01841
LAWRENCE, MA 01841
LAWRENCE, MA 01841
LAWRENCE, MA 01841
LAWRENCE, MA 01841
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 William Charini's NPI number?
The NPI number for William Charini is 1265505499. It was assigned to this individual provider in the NPPES registry on November 16, 2006.
Where is William Charini located?
William Charini practices at 1 General St, Lawrence, MA 01841. The listed phone number is (978) 683-4000.
What is William Charini's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.
Is William Charini enrolled in Medicare?
Yes. William Charini 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 organization bills Medicare for William Charini's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Charini reassigns Medicare benefits to Mass General Brigham Medical Group Northern Massachusetts Inc (Salem, MA). The 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 William Charini's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Charini accept?
Health plans from Anthem Blue Cross and Blue Shield and Taro Health list William Charini 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.
Is William Charini affiliated with any hospitals?
According to CMS data, William Charini is affiliated with North Shore Medical Center - and Massachusetts General Hospital.
When was this NPI record last updated?
The NPPES record for William Charini was last updated on December 14, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# William Anthony Charini, M.D. · NPI 1265505499
Infectious Disease physician in Lawrence, Massachusetts. Individual provider, active in the CMS NPPES registry since November 16, 2006.
## Identity
- **NPI:** 1265505499 (Entity type: Individual)
- **Enumerated:** November 16, 2006
- **Primary specialty:** Internal Medicine - Infectious Disease · taxonomy 207RI0200X
- **State license:** 150270 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 1 GENERAL ST, Lawrence, MA 01841-2961
- **Phone:** (978) 683-4000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Mass General Brigham Medical Group Northern Massachusetts Inc (NPI 1588606123, Salem, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, Irvine, California College Of Medicine, class of 1993
## Record status
- **NPPES last updated:** December 14, 2017
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Source: [NPI Profile](https://npiprofile.com/npi/1265505499) · Data from the CMS NPPES public registry.