Arianna Mclellan, LCMHC
NPI 1649793605 · Addiction (Substance Use Disorder) Counselor · Portsmouth, NH
Enrolled with Medicare as Practitioner - Mental Health Counselor · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Arianna Mclellan, LCMHC is a Addiction (Substance Use Disorder) Counselor provider in Portsmouth, NH (NPI 1649793605).
Provider details
- NPI number
- 1649793605
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Credential
- LCMHC
- Sex
- Female
- Sole proprietor
- No
- License
- 1263 (NH)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
8 yrs in NPPES 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
- 2017-07-21
- Last updated
- 2023-02-22
- Certified
- 2023-02-22
Frequently asked questions
- What is Arianna Mclellan's NPI number?
- Arianna Mclellan's National Provider Identifier (NPI) is 1649793605, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Arianna Mclellan's specialty?
- Arianna Mclellan is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Arianna Mclellan located?
- Arianna Mclellan's practice location on file with NPPES is 1145 Sagamore Ave, Portsmouth, NH 03801-5503.
- What is Arianna Mclellan's phone number?
- The practice phone number listed in the NPPES registry for Arianna Mclellan is (603) 431-6703.
- Does Arianna Mclellan accept Medicare?
- Arianna Mclellan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Arianna Mclellan's NPI active?
- Yes — Arianna Mclellan's NPI (1649793605) is active in the NPPES registry as of the last update on 2023-02-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.