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Nurse Practitioner

Gretha Lewis

Sees patients in Waterbury, CT · Connecticut

Summary

Gretha Lewis (Nurse Practitioner) is enrolled with Medicare at 1 practice location in Waterbury, CT. NPI 1720398340. Medicare data says the clinician accepts Medicare assignment. Source: CMS National Downloadable File, updated 2026-10-02.

Call(203) 800‑1642 NPI Registry record Medicare profile

From official Medicare data

This page shows what Medicare's official clinician data says about Gretha Lewis, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

1Practice location
Nurse PractitionerPrimary specialty
YesAccepts Medicare assignment
17Years since medical school (graduated 2009)
FemaleGender (as listed)
Peaceful Minds Treatment Center LLCGroup practice

Quick answers

Where does Gretha Lewis see patients?
Medicare's clinician data lists 1 practice location in Waterbury, CT. Call before your visit to confirm the address.
What is Gretha Lewis's specialty?
Medicare lists Nurse Practitioner as the primary specialty.
Does Gretha Lewis accept Medicare assignment?
Yes. Medicare's clinician data says Gretha Lewis accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
What is the phone number for Gretha Lewis?
(203) 800-1642, as listed in official Medicare / NPI Registry data.
What is Gretha Lewis's NPI number?
1720398340. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Practice locations

Addresses where Gretha Lewis is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Gretha Lewis as a member of this group (CMS data updated 2026-10-02).

  • Peaceful Minds Treatment Center LLC2 clinicians in the group

Specialties

Find other clinicians: Nurse Practitioner, Connecticut →

Other nurse practitioners in Waterbury

Clinicians with the same Medicare primary specialty in Waterbury, CT — not a recommendation.

All nurse practitioners in Waterbury →

Clinician information

Graduation year2009
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1720398340
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  2. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  3. Medicare Care Compare — official Medicare tool to look up clinicians