Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. John Thomas Harris, M.D.
Psychiatry Physician in Helena, MT · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1710189709
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Registry record
Entity type Individual (Type 1)
Name Dr. John Thomas Harris
Credential M.D.
Sex Male
Practice address 900 Jackson St, Center for Mental Health, Helena, MT, 59601
Phone (406) 443-7151
Fax (406) 443-3420
Enumeration date Jun 3, 2007
Last updated in NPPES Mar 7, 2023
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 0000099066 | Other | MT | BLUE CROSS-SHIELD OF MONT |
| P00692143 C01340 | Other | MT | RAILROAD MEDICARE |
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
Is NPI 1710189709 active?
Yes, as of the latest NPPES snapshot, NPI 1710189709 is active (record last updated 2023-03-07).
How do I verify John Harris's NPI record?
Cross-check NPI 1710189709 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all → Arlena Crandell Clinical Social Worker · Helena, MT NPI 1336114768 Christine Daly Psychiatry Physician · Helena, MT NPI 1649380684 Sherry Bersanti Mental Health Counselor · Helena, MT NPI 1699845875 Rosemary Crowley Clinical Social Worker · Helena, MT NPI 1063570240 Kimberley Weldon Clinical Social Worker · Helena, MT NPI 1649486358 Kim Waples Clinical Social Worker · Helena, MT NPI 1427243658 George Ryan Professional Counselor · Helena, MT NPI 1790961969 Robert Brown Mental Health Counselor · Helena, MT NPI 1346414349
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-07.