Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Douglas Marshall Chay, MSW LCSW C
Clinical Social Worker in Glen Burnie, MD · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1831151844
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Registry record
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 0008 | Other | - | BLUE SHIELD FEDERAL |
| 10761882 | Other | - | CAQH |
| 245079 | Other | - | MHN AND TRICARE |
| 264800000 | Other | - | MAGELLAN BEHAVIORAL HEALT |
| 287864 | Other | - | MAMSI UNITED HEALTH CARE |
| S003 | Other | - | BLUE SHIELD FEDERAL GROUP |
| 162110 | Other | - | VALUE OPTIONS AND GREAT W |
| 513264 | Other | - | NCPPO INNOVA MHIP |
| 522229157 | Other | - | PHCS |
| 7626281 | Other | - | AETNA BEHAVIORAL HEALTH |
| 100033664 | Other | - | APS |
| 61002201 | Other | - | BLUE SHIELD OF MD |
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.
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Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-04-09.