Matthew Willis
NPI 1104275270 · Addiction (Substance Use Disorder) Counselor · Grass Valley, CA
Matthew Willis is a Addiction (Substance Use Disorder) Counselor provider in Grass Valley, CA (NPI 1104275270).
Provider details
- NPI number
- 1104275270
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- No
- License
- R1236930816 (CA)
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
10 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
- 2016-06-08
- Last updated
- 2017-03-08
Frequently asked questions
- What is Matthew Willis's NPI number?
- Matthew Willis's National Provider Identifier (NPI) is 1104275270, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Willis's specialty?
- Matthew Willis is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Matthew Willis located?
- Matthew Willis's practice location on file with NPPES is 180 Sierra College Dr, Grass Valley, CA 95945-5768.
- What is Matthew Willis's phone number?
- The practice phone number listed in the NPPES registry for Matthew Willis is (530) 271-1140.
- Is Matthew Willis's NPI active?
- Yes — Matthew Willis's NPI (1104275270) is active in the NPPES registry as of the last update on 2017-03-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.