John Hummer, PHD.
NPI 1598869778 · Clinical Psychologist · Kingsport, TN
John Hummer, PHD. is a Clinical Psychologist provider in Kingsport, TN (NPI 1598869778).
Provider details
- NPI number
- 1598869778
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PHD.
- Sex
- Male
- Sole proprietor
- No
- License
- PY0005168 (FL)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
- 2006-09-11
- Last updated
- 2022-02-01
- Certified
- 2022-02-01
Frequently asked questions
- What is John Hummer's NPI number?
- John Hummer's National Provider Identifier (NPI) is 1598869778, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Hummer's specialty?
- John Hummer is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is John Hummer located?
- John Hummer's practice location on file with NPPES is 1570 Waverly Road, Kingsport, TN 37664.
- What is John Hummer's phone number?
- The practice phone number listed in the NPPES registry for John Hummer is (423) 224-1300.
- Is John Hummer's NPI active?
- Yes — John Hummer's NPI (1598869778) is active in the NPPES registry as of the last update on 2022-02-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.