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NPISignal

Individual Healthcare Provider

Leon Charles Bass, M.D.

NPI Record: ActiveInternal Medicine — Pulmonary Disease
NPI1063639839
Johnson City, Tennessee

Provider's NPPES record last updated: October 30, 2023

Overview

Entity Type
Individual Healthcare Provider
NPI
1063639839
Primary Specialty
Internal Medicine — Pulmonary Disease
Practice Location
Johnson City, Tennessee
Sole Proprietor
No

Federal Screening

NPISignal checked this NPI against federal exclusion sources. Results below are based on the NPI number itself — an identifier match, not a name match.

List of Excluded Individuals/Entities (LEIE)

HHS Office of Inspector General

No potential match identified

No potential match was identified in NPISignal's indexed List of Excluded Individuals/Entities (LEIE) records as of 2026-09-10.

Source data
September 10, 2026
Records indexed
84,001
Screened
Sep 22, 2026, 1:52 AM UTC

This reflects only the records NPISignal currently holds and the identity information supplied. It is not a verification of eligibility, licensure, or compliance. Verify decisions that matter against the authoritative source.

SAM.gov Exclusions

U.S. General Services Administration

Not checked

SAM.gov Exclusions was not checked.

SAM.gov screening is not configured on this deployment. No SAM check has been performed.

Screened
Not checked

This is an NPI-based check only. NPISignal does not publish name-based exclusion matches on a provider profile. A shared or similar name is a lead that requires human review, not an identification, and this page is not the place to make one. Run a name-based screening below to see potential matches with the reasons for each.

This reflects only the records NPISignal currently holds and the identity information supplied. It is not a verification of eligibility, licensure, or compliance. Verify decisions that matter against the authoritative source.

Run a name-based screening

Searches OIG LEIE and SAM.gov by name and reviews every potential match.

Specialties & Taxonomies

  • Internal Medicine

    Pulmonary Disease

    Allopathic & Osteopathic Physicians

    Primary

    An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.

    Taxonomy code 207RP1001X
  • Internal Medicine

    Allopathic & Osteopathic Physicians

    A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

    Taxonomy code 207R00000X
  • Internal Medicine

    Critical Care Medicine

    Allopathic & Osteopathic Physicians

    An internist who diagnoses, treats and supports patients with multiple organ dysfunction. This specialist may have administrative responsibilities for intensive care units and may also facilitate and coordinate patient care among the primary physician, the critical care staff and other specialists.

    Taxonomy code 207RC0200X
  • Internal Medicine

    Sleep Medicine

    Allopathic & Osteopathic Physicians

    An Internist who practices Sleep Medicine is certified in the subspecialty of sleep medicine and specializes in the clinical assessment, physiologic testing, diagnosis, management and prevention of sleep and circadian rhythm disorders. Sleep specialists treat patients of any age and use multidisciplinary approaches. Disorders managed by sleep specialists include, but are not limited to, sleep related breathing disorders, insomnia, hypersomnias, circadian rhythm sleep disorders, parasomnias and sleep related movement disorders.

    Taxonomy code 207RS0012X

Provider-Reported License Information

Internal Medicine (Tennessee)
48080
Internal Medicine (Virginia)
0101251956
Internal Medicine (Tennessee)
48080
Internal Medicine (Georgia)
001195
Internal Medicine (Tennessee)
48080
Internal Medicine (Tennessee)
48080
License numbers are reported by the provider to NPPES and are not independently verified by NPISignal against any state licensing board. Confirm current license status directly with the issuing state board.

Practice Locations

Practice Location

400 N State of Franklin Rd

Room 2746

Johnson City, Tennessee 37604-6035

Phone: (423) 431-2727

Additional Practice Location

410 N State of Franklin Rd Ste 130a

Johnson City, Tennessee 37604-6972

Phone: (423) 431-2460

Additional Practice Location

24530 Falcon Place Blvd Ste 101

Abingdon, Virginia 24211-7665

Phone: (276) 619-3876

Additional Practice Location

743 Island Rd

Bristol, Virginia 24201-7403

Phone: (276) 469-4200

Additional Practice Location

105 W Stone Dr Ste 1j

Kingsport, Tennessee 37660-3365

Phone: (423) 378-7645

Additional Practice Location

71 S Flanagan Ave

Lebanon, Virginia 24266

Phone: (276) 415-9160

Record Information

Enumeration Date
April 20, 2007
Provider's NPPES Record Last Updated
October 30, 2023
Certification Date
October 29, 2023
NPISignal NPPES Dataset
August 2026

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