Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. John G Cowl, MD
Psychiatry Physician in Duxbury, MA · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1235277492
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Dr. John G Cowl
Credential MD
Sex Male
Practice address 113 Tremont St, Duxbury, MA, 02332
Phone (781) 934-6226
Fax (781) 934-7037
Enumeration date Feb 1, 2007
Last updated in NPPES Jul 11, 2007
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
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
What is the NPI number for John Cowl?
The National Provider Identifier (NPI) for John Cowl is 1235277492, a Type 1 (individual) record in the CMS NPPES registry.
Where does John Cowl practice?
The practice location on file with NPPES is in Duxbury, MA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Nancy Ovaska Adult Psychiatric/Mental Health Clinical Nurse Specialist · Duxbury, MA NPI 1487619920 Nancy Campbell Clinical Social Worker · Duxbury, MA NPI 1891894960 Kristen Cox Mental Health Counselor · Duxbury, MA NPI 1063553394 Donna Crowell Mental Health Counselor · Duxbury, MA NPI 1134260474 Debra Goldenberg Clinical Social Worker · Duxbury, MA NPI 1003957036 Jennifer Lakins Mental Health Counselor · Duxbury, MA NPI 1770625584 Kimberly Larson-Nelson Mental Health Counselor · Duxbury, MA NPI 1992847719 Katy Hamilton Mental Health Counselor · Duxbury, MA NPI 1194867440
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-11.