Mallyssa Day, LMSW-CC
NPI 1649988510 · Clinical Social Worker · Saco, ME
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mallyssa Day, LMSW-CC is a Clinical Social Worker provider in Saco, ME (NPI 1649988510).
Provider details
- NPI number
- 1649988510
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LMSW-CC
- Sex
- Female
- Sole proprietor
- No
- License
- MC20585 (ME)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
3 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2022-11-09
- Last updated
- 2022-11-09
- Certified
- 2022-11-09
Frequently asked questions
- What is Mallyssa Day's NPI number?
- Mallyssa Day's National Provider Identifier (NPI) is 1649988510, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mallyssa Day's specialty?
- Mallyssa Day is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mallyssa Day located?
- Mallyssa Day's practice location on file with NPPES is 50 Moody St, Saco, ME 04072-1536.
- What is Mallyssa Day's phone number?
- The practice phone number listed in the NPPES registry for Mallyssa Day is (800) 434-3000.
- Does Mallyssa Day accept Medicare?
- Mallyssa Day is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mallyssa Day's NPI active?
- Yes — Mallyssa Day's NPI (1649988510) is active in the NPPES registry as of the last update on 2022-11-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.