Quick answers
- Does Marietta G. Lyon accept Medicare assignment?
- Yes. Medicare's clinician data says Marietta G. Lyon accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Marietta G. Lyon's NPI number?
- 1598846289. 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 Marietta G. Lyon is enrolled with Medicare (CMS data updated October 2, 2026).
- 1501 Washington StBraintree, MA 02184 (617) 847‑1950
- 1501 Washington St, Administrative OfficesBraintree, MA 02184
Group practices
Medicare enrollment lists Marietta G. Lyon as a member of this group (CMS data updated October 2, 2026).
- South Shore Mental Health Center Inc34 clinicians in the group
Specialties
- Clinical Social Workerprimary
Find other clinicians: Clinical Social Worker, Massachusetts →
Other clinical social workers in Braintree
Clinicians with the same Medicare primary specialty in Braintree, MA — not a recommendation.
Other clinicians in South Shore Mental Health Center Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | CSW |
|---|---|
| Graduation year | 1995 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1598846289 |
| Corrections | Report 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
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians