Thomas Mahan, PHD
NPI 1508922147 · Marriage & Family Therapist · Naperville, IL
Thomas Mahan, PHD is a Marriage & Family Therapist provider in Naperville, IL (NPI 1508922147).
Provider details
- NPI number
- 1508922147
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 166-000634 (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
- 2006-12-28
- Last updated
- 2009-10-27
Frequently asked questions
- What is Thomas Mahan's NPI number?
- Thomas Mahan's National Provider Identifier (NPI) is 1508922147, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Mahan's specialty?
- Thomas Mahan is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Thomas Mahan located?
- Thomas Mahan's practice location on file with NPPES is 124 S Webster St, Naperville, IL 60540-5390.
- What is Thomas Mahan's phone number?
- The practice phone number listed in the NPPES registry for Thomas Mahan is (630) 913-1627.
- Is Thomas Mahan's NPI active?
- Yes — Thomas Mahan's NPI (1508922147) is active in the NPPES registry as of the last update on 2009-10-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.