Dr. John Martin Chamberlain, PH.D.
Dr. John Martin Chamberlain is a Clinical Psychologist provider (Psychologist) practicing in Silver Spring, MD, registered in the NPPES registry with NPI 1114137098 since 2007. The credential PHD stands for Doctor of Philosophy.
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1114137098 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. John Martin Chamberlain |
| Credential | PH.D. |
| Sex | Male |
| Practice address | Silver Spring, MD, 20910 |
| Phone | 3014950266 |
| Enumeration date | 2007-05-22 |
| Last updated in NPPES | 2010-10-14 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 103TC0700X | Clinical Psychologist | Secondary | PSY1000161 | DC |
| 103TC0700X | Clinical Psychologist | Primary | 3623 | MD |
PHD — Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential
Copy-ready billing details
Provider: John Chamberlain, PH.D. NPI: 1114137098 Taxonomy: 103TC0700X (Clinical Psychologist) Address: Silver Spring, MD, 20910
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1023073996 | Samara Belman | Individual | Psychologist | Silver Spring, MD |
| 1760420764 | Chukwuemeka Onyewu | Individual | Plastic Surgery Physician | Silver Spring, MD |
| 1598700353 | Olivier Kreitmann | Individual | Obstetrics & Gynecology Physician | Silver Spring, MD |
| 1134148893 | John Duggan | Individual | Professional Counselor | Silver Spring, MD |
| 1376631515 | Center for Families in Transition, Inc. | Organization | Clinical Social Worker | Silver Spring, MD |
| 1295816908 | Ellen Schaefer-Salins | Individual | Clinical Social Worker | Silver Spring, MD |
| 1083796338 | Jennifer Mccartney | Individual | Clinical Psychologist | Silver Spring, MD |
| 1912060666 | Mark Bottinick | Individual | Clinical Social Worker | Silver Spring, MD |
Verify this record
Cross-check NPI 1114137098 against the authoritative CMS record: view Dr. John Martin Chamberlain 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 2010-10-14.