Marissa Leff
NPI 1699369827 · Occupational Therapist · Glen Ellyn, IL
Marissa Leff is a Occupational Therapist provider in Glen Ellyn, IL (NPI 1699369827).
Provider details
- NPI number
- 1699369827
- Entity type
- Individual
- Primary specialty
- Occupational TherapistRespiratory, Developmental, Rehabilitative and Restorative Service Providers
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Respiratory, Developmental, Rehabilitative and Restorative Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 yrs in NPPES registry
- Profile completeness38% of score
83% 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
- 2021-02-28
- Last updated
- 2022-03-22
- Certified
- 2022-03-22
Frequently asked questions
- What is Marissa Leff's NPI number?
- Marissa Leff's National Provider Identifier (NPI) is 1699369827, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marissa Leff's specialty?
- Marissa Leff is listed in the NPPES registry with a primary specialty of Occupational Therapist (Respiratory, Developmental, Rehabilitative and Restorative Service Providers).
- Where is Marissa Leff located?
- Marissa Leff's practice location on file with NPPES is 910 Roosevelt Rd, Glen Ellyn, IL 60137-7829.
- What is Marissa Leff's phone number?
- The practice phone number listed in the NPPES registry for Marissa Leff is (815) 469-1500.
- Is Marissa Leff's NPI active?
- Yes — Marissa Leff's NPI (1699369827) is active in the NPPES registry as of the last update on 2022-03-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.