Charles Callahan, PHD
NPI 1629086426 · Clinical Psychologist · Springfield, IL
Charles Callahan, PHD is a Clinical Psychologist provider in Springfield, IL (NPI 1629086426).
Provider details
- NPI number
- 1629086426
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 71004590 (IL)
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
19 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
- 2006-08-04
- Last updated
- 2007-07-08
Frequently asked questions
- What is Charles Callahan's NPI number?
- Charles Callahan's National Provider Identifier (NPI) is 1629086426, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charles Callahan's specialty?
- Charles Callahan is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Charles Callahan located?
- Charles Callahan's practice location on file with NPPES is 701 N 1st St, Springfield, IL 62781-0001.
- What is Charles Callahan's phone number?
- The practice phone number listed in the NPPES registry for Charles Callahan is (217) 788-3000.
- Is Charles Callahan's NPI active?
- Yes — Charles Callahan's NPI (1629086426) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.