MR. WILLIAM MITCHELL LEWITT NURSE PRACTITIONER
NPI 1215389366
Nurse Practitioner - Family in Nashua, NH
About Mr. William Mitchell Lewitt Nurse Practitioner NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MR. WILLIAM MITCHELL LEWITT NURSE PRACTITIONER (NPI 1215389366) is an individual family provider in Nashua, New Hampshire, licensed in New Hampshire (073326-23) and active in the NPI registry since July 2016. He is enrolled in Medicare PECOS, is affiliated with Southern Nh Medical Center, and is a graduate of Other (2015).
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. William Mitchell Lewitt Nurse Practitioner 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
3Medicare enrollment records show William Lewitt reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Amherst, NH 03031
- Reassigned Medicare billing, New Hampshire enrollment
- 8 clinicians in this Medicare group
Framingham, MA 01702
- Reassigned Medicare billing, Massachusetts enrollment
- 156 clinicians in this Medicare group
Stoughton, MA 02072
- Reassigned Medicare billing, Massachusetts enrollment
- 337 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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Southern Nh Medical Center
Acute Care Hospitals · Nashua, NHPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 03060 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 5
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
NASHUA, NH 03060
NASHUA, NH 03060
NASHUA, NH 03060
NASHUA, NH 03060
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 Lewitt's NPI number?
The NPI number for William Lewitt is 1215389366. It was assigned to this individual provider in the NPPES registry on July 12, 2016.
Where is William Lewitt located?
William Lewitt practices at 166 Kinsley St Ste 101, Nashua, NH 03060. The listed phone number is (603) 889-4131.
What is William Lewitt's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is William Lewitt enrolled in Medicare?
Yes. William Lewitt 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 William Lewitt's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Lewitt reassigns Medicare benefits to 3 organizations: Betternow PLLC (Amherst, NH), Hospitalist Physicians Of Massachusetts PC (Framingham, MA) and Sound Physicians Of Massachusetts, Inc (Stoughton, 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 William Lewitt's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Lewitt accept?
Health plans from Anthem Blue Cross and Blue Shield and Harvard Pilgrim Health Care list William Lewitt 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 Lewitt affiliated with any hospitals?
According to CMS data, William Lewitt is affiliated with Southern Nh Medical Center.
When was this NPI record last updated?
The NPPES record for William Lewitt was last updated on April 22, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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. William Mitchell Lewitt, NURSE PRACTITIONER · NPI 1215389366
Family physician in Nashua, New Hampshire. Individual provider, active in the CMS NPPES registry since July 12, 2016.
## Identity
- **NPI:** 1215389366 (Entity type: Individual)
- **Enumerated:** July 12, 2016
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 073326-23 (New Hampshire)
- **Sole proprietor:** No
## Practice location
- **Address:** 166 KINSLEY ST STE 101, Nashua, NH 03060-3676
- **Phone:** (603) 889-4131 · **Fax:** (603) 889-6419
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Betternow PLLC (NPI 1689223554, Amherst, NH); Hospitalist Physicians Of Massachusetts PC (NPI 1376145680, Framingham, MA); Sound Physicians Of Massachusetts, Inc (NPI 1245784446, Stoughton, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2015
## Record status
- **NPPES last updated:** April 22, 2019
---
Source: [NPI Profile](https://npiprofile.com/npi/1215389366) · Data from the CMS NPPES public registry.