Quick answers
- Does Mary K. Griggs accept Medicare assignment?
- Yes. Medicare's clinician data says Mary K. Griggs 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 Mary K. Griggs's NPI number?
- 1639827579. 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 Mary K. Griggs is enrolled with Medicare (CMS data updated October 2, 2026).
- 102 Main St, Suite 2Greenfield, MA 01301 (413) 774‑6252
Group practices
Medicare enrollment lists Mary K. Griggs as a member of this group (CMS data updated October 2, 2026).
- Center for Human Development, Inc.68 clinicians in the group
Specialties
- Mental Health Counselorprimary
Find other clinicians: Mental Health Counselor, Massachusetts →
Other mental health counselors in Greenfield
Clinicians with the same Medicare primary specialty in Greenfield, MA — not a recommendation.
Other clinicians in Center for Human Development, Inc.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2021 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1639827579 |
| 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