Mark F Geer
Mark F Geer is a Psychologist provider (Psychologist) practicing in Wellesley, MA, registered in the NPPES registry with NPI 1609843507 since 2006.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1609843507 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Mark F Geer |
| Sex | Male |
| Practice address | 11 RIVER ST, COLONY CARE BEHAVIORAL HEALTH, Wellesley, MA, 02481 |
| Phone | 7814311177 |
| Fax | 7814311181 |
| Enumeration date | 2006-03-01 |
| Last updated in NPPES | 2007-07-08 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 103T00000X | Psychologist | Primary | 2969 | MA |
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 0510645 | Medicaid | MA | — |
Copy-ready billing details
Provider: Mark Geer NPI: 1609843507 Taxonomy: 103T00000X (Psychologist) Address: 11 RIVER ST, COLONY CARE BEHAVIORAL HEALTH, Wellesley, MA, 02481
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1053395616 | Tracy Barnes | Individual | Clinical Social Worker | Wellesley, MA |
| 1790760858 | Tanya Cherkerzian | Individual | Clinical Social Worker | Wellesley, MA |
| 1073586780 | Susan Ruskin | Individual | Psychiatry Physician | Wellesley, MA |
| 1700851490 | Lois Ashcroft | Individual | Mental Health Counselor | Wellesley, MA |
| 1356316988 | Katherine Eyre | Individual | Clinical Social Worker | Wellesley, MA |
| 1720053408 | Colony Care Inc | Organization | Mental Health Counselor | Wellesley, MA |
| 1487629176 | Laura Kinney | Individual | Clinical Social Worker | Wellesley, MA |
| 1619944519 | Cathy Spear | Individual | Clinical Social Worker | Wellesley, MA |
Verify this record
Cross-check NPI 1609843507 against the authoritative CMS record: view Mark F Geer 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 2007-07-08.