Ian Nelson-Johnson, PSY.D.
NPI 1598209033 · Clinical Psychologist · Madison, WI
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ian Nelson-Johnson, PSY.D. is a Clinical Psychologist provider in Madison, WI (NPI 1598209033).
Provider details
- NPI number
- 1598209033
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PSY.D.
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Behavioral Health & Social Service Providers
- Counselor101Y00000X
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
9 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
- 2016-12-16
- Last updated
- 2023-04-26
- Certified
- 2023-04-26
Frequently asked questions
- What is Ian Nelson-Johnson's NPI number?
- Ian Nelson-Johnson's National Provider Identifier (NPI) is 1598209033, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ian Nelson-Johnson's specialty?
- Ian Nelson-Johnson is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Ian Nelson-Johnson located?
- Ian Nelson-Johnson's practice location on file with NPPES is 6649 Odana Rd, Madison, WI 53719-1011.
- What is Ian Nelson-Johnson's phone number?
- The practice phone number listed in the NPPES registry for Ian Nelson-Johnson is (847) 736-2917.
- Does Ian Nelson-Johnson accept Medicare?
- Ian Nelson-Johnson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ian Nelson-Johnson's NPI active?
- Yes — Ian Nelson-Johnson's NPI (1598209033) is active in the NPPES registry as of the last update on 2023-04-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.