MRS. ERIN LEWIS APRN
NPI 1639680788
Nurse Practitioner in Boston, MA
About Mrs. Erin Lewis Aprn NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MRS. ERIN LEWIS APRN (NPI 1639680788) is an individual nurse practitioner in Boston, Massachusetts, licensed in Massachusetts (RN2286744) and active in the NPI registry since October 2017. She is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and is a graduate of Other (2017).
NPPES Registry Identity
Specialties & Licenses 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 and accepts Medicare assignment
Mrs. Erin Lewis Aprn 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 Erin Lewis reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,234 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,360 clinicians in this Medicare group
Burlington, MA 01805
- Reassigned Medicare billing, Massachusetts enrollment
- Also billed through NPI 1063447316 (Massachusetts)
- 1,574 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 3
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.
Massachusetts General Hospital
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02114 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 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Erin Lewis's NPI number?
The NPI number for Erin Lewis is 1639680788. It was assigned to this individual provider in the NPPES registry on October 17, 2017.
Where is Erin Lewis located?
Erin Lewis practices at 165 Cambridge St Ste 501, Boston, MA 02114. The listed phone number is (617) 726-4900.
What is Erin Lewis's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is Erin Lewis enrolled in Medicare?
Yes. Erin Lewis 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 Erin Lewis's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Erin Lewis reassigns Medicare benefits to 3 organizations: The General Hospital Corporation (Boston, MA), Massachusetts General Physicians Organization Inc (Boston, MA) and Lahey Clinic, Inc. (Burlington, 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 Erin Lewis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Erin Lewis accept?
Health plans from Taro Health list Erin Lewis 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 Erin Lewis affiliated with any hospitals?
According to CMS data, Erin Lewis is affiliated with Massachusetts General Hospital.
When was this NPI record last updated?
The NPPES record for Erin Lewis was last updated on March 25, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Mrs. Erin Lewis, APRN · NPI 1639680788
Nurse Practitioner physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since October 17, 2017.
## Identity
- **NPI:** 1639680788 (Entity type: Individual)
- **Enumerated:** October 17, 2017
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** RN2286744 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 165 CAMBRIDGE ST STE 501, Boston, MA 02114-2759
- **Phone:** (617) 726-4900 · **Fax:** (617) 228-6306
## 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): The General Hospital Corporation (NPI 1023049236, Boston, MA); Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA); Lahey Clinic, Inc. (NPI 1538194980, Burlington, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2017
## Record status
- **NPPES last updated:** March 25, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1639680788) · Data from the CMS NPPES public registry.