Chambless Johnston, MD
NPI 1790972628 · Internal Medicine Physician · Johnson City, TN
Enrolled with Medicare as Practitioner - Addiction Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Chambless Johnston, MD is a Internal Medicine Physician provider in Johnson City, TN (NPI 1790972628).
Provider details
- NPI number
- 1790972628
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 408 N State of Franklin RdSuite 24Johnson City, TN 37604-6089Phone: (423) 431-1810Fax: (423) 431-1811
Registry dates
- Enumerated
- 2007-09-25
- Last updated
- 2023-09-18
- Certified
- 2023-09-01
Frequently asked questions
- What is Chambless Johnston's NPI number?
- Chambless Johnston's National Provider Identifier (NPI) is 1790972628, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Chambless Johnston's specialty?
- Chambless Johnston is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Chambless Johnston located?
- Chambless Johnston's practice location on file with NPPES is 2408 Susannah St, Johnson City, TN 37601-1732.
- What is Chambless Johnston's phone number?
- The practice phone number listed in the NPPES registry for Chambless Johnston is (423) 434-6677.
- Does Chambless Johnston accept Medicare?
- Chambless Johnston is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Chambless Johnston's NPI active?
- Yes — Chambless Johnston's NPI (1790972628) is active in the NPPES registry as of the last update on 2023-09-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.