Marissa Leff
Occupational Therapist · Glen Ellyn, IL
Marissa Leff is an occupational therapist with a practice address in Glen Ellyn, Illinois, and NPI 1699369827, issued on Feb 28, 2021. Check the license with the Illinois board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Marissa Leff
- Primary taxonomy
- Occupational Therapist 225X00000X
- Practice location
- 910 Roosevelt RD, Glen Ellyn, IL 60137
- Phone
- (815) 469-1500
- Enumerated
- Feb 28, 2021
- Record last updated
- Mar 22, 2022
- Entity
- Type 1 · individual
8 nearest occupational therapist records → All 5,855 in Illinois → Look up another NPI →
Also registered at 910 Roosevelt RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Margaret Brant, OTR/LOccupational Therapist1437862901
- Yazmin Camarena, M.S.Speech-Language Pathologist1619695087
- Hannah Chellino, BCBABehavior Analyst1356122881
- Ella Dutton, BCBABehavior Analyst1053803841
- Ellen HarrisSpeech-Language Pathologist1225705064
- Lauren HedmanMental Health Counselor1295603819
Verify Marissa Leff in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Marissa Leff among 5,855 occupational therapist records in Illinois
Marissa Leff is one of 5,855 occupational therapist records with a practice address in Illinois. 13% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2021, is newer than 72% of them.
- NPI issued2021 · 72% of these records are older, 22% newer
- In a Medicare fileNo · 13% of these records are
- In the CMS Doctors and Clinicians fileNo · 14% of these records are
- Record last updated2022 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 225X00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
19 occupational therapist records list a practice address in Glen Ellyn
They are 19 of the 684 NPPES records with a practice address in Glen Ellyn, and 5,855 occupational therapist records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 5,855 in Illinois → Every provider in Glen Ellyn → Occupational Therapist nationwide →
The 8 occupational therapist records with the nearest ZIP codes
- Janet Alonso, OT/LGlen Ellyn, IL 601371225302524
- Margaret Brant, OTR/LGlen Ellyn, IL 601371437862901
- Theresa Christopher, OTD, OTR/LGlen Ellyn, IL 601371528675014
- Lisa Ciosek, OTGlen Ellyn, IL 601371902029374
- Renee Corner, OTGlen Ellyn, IL 601371386715100
- Oliver Dela Rosa, OTGlen Ellyn, IL 601371558920769
- Brock Gorman, OTGlen Ellyn, IL 601371508103136
- Meena Harper, OTD, OTR/LGlen Ellyn, IL 601371962122242
Common questions
What is Marissa Leff's NPI number?
Marissa Leff's National Provider Identifier (NPI) is 1699369827, issued on Feb 28, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Marissa Leff located?
The NPPES record lists a practice address at 910 Roosevelt RD, Glen Ellyn, IL, 60137. Phone: (815) 469-1500. Providers update this record themselves, so call before visiting.
How can I verify Marissa Leff's license?
Search the Illinois board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.