Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor
Dr. John T Zweig, EDD
Counseling Psychologist in Salisbury, MD · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1104993625
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Registry record
Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| G978 | Other | MD | BLUE CROSS BLUE SHIELD |
| 21969 | Other | - | ESCPH |
| 096143 | Other | - | TRICARE |
| 2303 | Other | - | COVENTRY INSURANCE |
| R461 | Other | MD | FEDERAL BCBS |
| 775231800 | Medicaid | MD | - |
| 210063 | Other | - | MDIPA OPTIMUM CHOICE MAMS |
| 640452 | Other | - | NCPPO |
| 9387032 | Other | - | PHCS |
| 001134 | Other | - | VALUE OPTIONS |
| 100052120001 | Other | - | APS HEALTHCARE |
| 11251162 | Other | - | UNITED HEALTHCARE |
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.
Frequently asked questions
Is NPI 1104993625 active?
How do I verify John Zweig's NPI record?
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-07-07.