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DIANNA GRANTHAM, P.C.
NPI 1659210714
Counselor - Mental Health in Billings, MT

Active since March 25, 2026
501 S 44TH ST W APT 1325, BILLINGS, MT 59106(406) 927-6119 Get Directions Write a Review

NPPES record last updated: March 25, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dianna Grantham, P.c. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DIANNA GRANTHAM, P.C. (NPI 1659210714) is a healthcare organization registered as a mental health in Billings, Montana and active in the NPI registry since March 2026. The organization lists Dianna Grantham, Provider, as its authorized official.

NPPES Registry Identity

NPI1659210714
Entity TypeOrganization
Primary Taxonomy101YM0800X
Legal Business NameDIANNA GRANTHAM, P.C.
Location Address501 S 44TH ST W APT 1325Billings, MT 59106-3916
Mailing AddressPo Box 30864Billings, MT 59107-0864
Phone(406) 927-6119
Organization SubpartNo
Authorized OfficialDianna GranthamProvider · (406) 927-6119
Enumeration DateMarch 25, 2026
NPPES CertifiedMarch 25, 2026
✔ NPI 1659210714 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Mental HealthBehavioral Health & Social Service Providers
Taxonomy Code101YM0800X
501 S 44TH ST W APT 1325, Billings, MT 59106
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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Dianna Grantham, P.C.'s NPI number?

The NPI number for Dianna Grantham, P.C. is 1659210714. It was assigned to this organization in the NPPES registry on March 25, 2026.

Where is Dianna Grantham, P.C. located?

Dianna Grantham, P.C. is located at 501 S 44th St W Apt 1325, Billings, MT 59106. The listed phone number is (406) 927-6119.

What is Dianna Grantham, P.C.'s specialty?

The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.

When was this NPI record last updated?

The NPPES record for Dianna Grantham, P.C. was last updated on March 25, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.