John Williamson
NPI 1205773652 · Addiction (Substance Use Disorder) Counselor · Columbus, OH
John Williamson is a Addiction (Substance Use Disorder) Counselor provider in Columbus, OH (NPI 1205773652).
Provider details
- NPI number
- 1205773652
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- No
- License
- CDCAPRE.195371 (OH)
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
- 2026-05-04
- Last updated
- 2026-05-04
- Certified
- 2026-05-03
Frequently asked questions
- What is John Williamson's NPI number?
- John Williamson's National Provider Identifier (NPI) is 1205773652, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Williamson's specialty?
- John Williamson is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is John Williamson located?
- John Williamson's practice location on file with NPPES is 27 E Russell St Ste 200, Columbus, OH 43215-2012.
- What is John Williamson's phone number?
- The practice phone number listed in the NPPES registry for John Williamson is (614) 285-6263.
- Is John Williamson's NPI active?
- Yes — John Williamson's NPI (1205773652) is active in the NPPES registry as of the last update on 2026-05-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.