Nathan Chalk
NPI 1255957221 · Addiction (Substance Use Disorder) Counselor · Ceres, CA
Nathan Chalk is a Addiction (Substance Use Disorder) Counselor provider in Ceres, CA (NPI 1255957221).
Provider details
- NPI number
- 1255957221
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- No
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
6 yrs in NPPES registry
- Profile completeness38% of score
83% 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
- 2020-06-24
- Last updated
- 2025-11-20
- Certified
- 2025-11-20
Frequently asked questions
- What is Nathan Chalk's NPI number?
- Nathan Chalk's National Provider Identifier (NPI) is 1255957221, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nathan Chalk's specialty?
- Nathan Chalk is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Nathan Chalk located?
- Nathan Chalk's practice location on file with NPPES is 1904 Richland Ave, Ceres, CA 95307-4562.
- What is Nathan Chalk's phone number?
- The practice phone number listed in the NPPES registry for Nathan Chalk is (209) 525-6127.
- Is Nathan Chalk's NPI active?
- Yes — Nathan Chalk's NPI (1255957221) is active in the NPPES registry as of the last update on 2025-11-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.