Dianna Grantham, P.C.
NPI 1659210714 · Mental Health Counselor · Billings, MT
Dianna Grantham, P.C. is a Mental Health Counselor organization in Billings, MT (NPI 1659210714).
Provider details
- NPI number
- 1659210714
- Entity type
- Organization
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Organization subpart
- No
- Authorized official
- Dianna Grantham, Provider(406) 927-6119
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
Under 1 yr in registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2026-03-25
- Last updated
- 2026-03-25
- Certified
- 2026-03-25
Frequently asked questions
- What is Dianna Grantham, P.C.'s NPI number?
- Dianna Grantham, P.C.'s National Provider Identifier (NPI) is 1659210714, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Dianna Grantham, P.C.?
- Dianna Grantham, P.C. is classified in the NPPES registry as Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is Dianna Grantham, P.C. located?
- Dianna Grantham, P.C.'s practice location on file with NPPES is 501 S 44th St W Apt 1325, Billings, MT 59106-3916.
- What is Dianna Grantham, P.C.'s phone number?
- The practice phone number listed in the NPPES registry for Dianna Grantham, P.C. is (406) 927-6119.
- Who is the authorized official for Dianna Grantham, P.C.?
- The authorized official listed on Dianna Grantham, P.C.'s NPPES record is Dianna Grantham, Provider. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Dianna Grantham, P.C.'s NPI active?
- Yes — Dianna Grantham, P.C.'s NPI (1659210714) is active in the NPPES registry as of the last update on 2026-03-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.