| Rujvi Kamat | Ph.D. | Yes | | 18+ | | |
| Navya Kamath | Psy.D. | Yes | | 5-20 | | |
| Vidyulata Kamath | Ph.D. | Yes | | 18+ | | |
| Joel E. Kamper | Ph.D. | Yes | | Adults | | |
| Kelly Kane | Psy.D. | Yes | | 6+ | | |
| Robert L. Kane | Ph.D. | Yes | | 18 and over | - District of Columbia
- Maryland
- Virginia
| |
| Jason E. Kanz | Ph.D. | Yes | | | | |
| Jason M. Kaplan | Psy.D. | Yes | | 18-99 | | |
| Richard F. Kaplan | Ph.D. | No | | Adult | | |
| David A. Kareken | Ph.D. | Yes | | 18 and older | | |
| David Katz | Ph.D. | No | | | | |
| Jennifer M. Katzenstein | Ph.D. | Yes | | | | |
| David A S Kaufman | Ph.D. | Yes | | | | |
| Paul Mark Kaufmann | J.D., Ph.D. | Yes | | Pediatric and Adult, all ages | | |
| Brian Coyne Kavanaugh | Psy.D. | Yes | | Pediatric | - Massachusetts
- Rhode Island
| |
| Julie E Keaveney | Psy.D. | Yes | | Adolescents, Adults, Geriatric | | |
| Pamela A. Keenan | Ph.D. | No | | | | |
| Cierra M. Keith | Ph.D. | Yes | | 18+ | | |
| Jill Lynette Kelderman | Ph.D. | Yes | | 6 months - 18 years | | |
| Jennifer M Keller | Psy.D. | Yes | | 18+ | | |
| Mark P. Kelly | Ph.D. | No | | | | |
| Natalie Cunningham Kelly | Ph.D. | Yes | | | | |
| Laura E. Kenealy | Ph.D. | Yes | | children and adolescents | - District of Columbia
- Maryland
| |
| Nancy A. Kennedy | Ph.D. | Yes | | age 16 and over | | |
| Stephan Kennepohl | Ph.D. | Yes | | Adult | | |