Charles E. Streff
Charles E. Streff is a healthcare organization registered as Clinical Psychologist in Acton, MA, holding Type 2 (organization) NPI 1700921673 since 2007. The authorized official on file is Charles Streff, Owner.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1700921673 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | Charles E. Streff |
| Other name | <Unavail> |
| Practice address | 532 GREAT RD, Acton, MA, 01720 |
| Phone | 9782630439 |
| Fax | 9784863140 |
| Enumeration date | 2007-02-20 |
| Last updated in NPPES | 2007-07-20 |
Authorized official
| Name | Charles Streff |
|---|---|
| Title | Owner |
| Phone | 9782630439 |
Taxonomy & classification
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 103T00000X | Psychologist | Secondary | — | — |
| 163WP0808X | Psychiatric/Mental Health Registered Nurse | Secondary | — | — |
| 103TC0700X | Clinical Psychologist | Primary | — | — |
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| W10613 | Other | MA | BLUE CROSS |
| 612861 | Other | MA | TUFTS |
Copy-ready billing details
Provider: Charles E. Streff NPI: 1700921673 Taxonomy: 103TC0700X (Clinical Psychologist) Address: 532 GREAT RD, Acton, MA, 01720
Providers at this address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1245229988 | Elaine Olmstead | Individual | Adult Psychiatric/Mental Health Clinical Nurse Specialist | Acton, MA |
| 1932130598 | Michael Macht-Greenberg | Individual | Psychologist | Acton, MA |
| 1558389445 | Daniel Sanford | Individual | Clinical Psychologist | Acton, MA |
| 1114029733 | Charles Streff | Individual | Psychologist | Acton, MA |
| 1073705927 | Christopher Marobella | Individual | Clinical Social Worker | Acton, MA |
| 1780870527 | Susan Valente | Individual | Clinical Social Worker | Acton, MA |
| 1992128086 | Streff Associates | Organization | Clinical Psychologist | Acton, MA |
| 1285006734 | Eleanor Fulton | Individual | Clinical Psychologist | Acton, MA |
Verify this record
Cross-check NPI 1700921673 against the authoritative CMS record: view Charles E. Streff 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
What type of organization is Charles E. Streff?
What is a Type 2 NPI?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-20.