Melissa Leigh Ryan
Melissa Leigh Ryan is a Behavior Analyst provider (Behavior Analyst) practicing in Darien, IL, registered in the NPPES registry with NPI 1366915860 since 2019.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1366915860 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Melissa Leigh Ryan |
| Sex | Female |
| Practice address | 8149 CASS AVE, Darien, IL, 60561 |
| Phone | 6305416441 |
| Enumeration date | 2019-01-07 |
| Last updated in NPPES | 2019-01-07 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 103K00000X | Behavior Analyst | Primary | — | IL |
Copy-ready billing details
Provider: Melissa Ryan NPI: 1366915860 Taxonomy: 103K00000X (Behavior Analyst) Address: 8149 CASS AVE, Darien, IL, 60561
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1093206245 | Lauren Tregoning | Individual | Behavior Analyst | Darien, IL |
Verify this record
Cross-check NPI 1366915860 against the authoritative CMS record: view Melissa Leigh Ryan on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2019-01-07.