Table 3.
Number of people with any of 10 most common LTBI-related conditions with SNOMED CT codes in EHRs and number and percentage of those with matched and most common unmatched ICD-10-CM codes in claims,* 2015–2017
| Description (SNOMED CT Code) | Personsn† | SNOMED CT to ICD-10-CM map, matched‡ or top unmatched TB code | Description (ICD-10-CM Code) | Personsn | ICD-10 match %§ |
|---|---|---|---|---|---|
| TB screening status (finding) (429599001) | 2817 | Match | —¶ | — | — |
| Most common unmatched | Encounter for screening for respiratory TB (Z11.1) | 2180 | 77.4 | ||
| Mantoux: positive (finding) (268376005) | 868 | Match | — | — | — |
| Most common unmatched | Nonspecific reaction to TST without active TB (R76.11) | 534 | 61.5 | ||
| TST adverse reaction (disorder) (292093003) | 320 | Match | — | — | — |
| Most common unmatched | Nonspecific reaction to TST without active TB (R76.11) | 214 | 66.9 | ||
| Pulmonary TB (154283005) | 122 | Matched | TB of lung (A15.0) | 39 | 32 |
| Most common unmatched | Nonspecific reaction to TST without active TB (R76.11) | 44 | 36.1 | ||
| Nonspecific TST reaction (441846005) | 116 | Matched | Nonspecific reaction to TST without active TB (R76.11) | 41 | 35.3 |
| Matched | Nonspecific reaction to cell-mediated immunity measurement of gamma interferon antigen response without active TB (R76.12) | 87 | 75 | ||
| Most common unmatched | Encounter for screening for respiratory TB (Z11.1) | 10 | 8.6 | ||
| Inactive TB of lung (428697002) | 0 | Match | — | — | — |
| Most common unmatched | — | — | — | ||
| Inactive TB (11999007) | 0 | Match | — | — | — |
| Most common unmatched | — | — | — | ||
| On TB chemoprophylaxis (414940009) | 0 | Match | — | — | — |
| Most common unmatched | — | — | — | ||
| Infection due to M. tuberculosis (373576009) | 0 | Match | — | — | — |
| Most common unmatched | — | — | — |
Latent TB SNOMED CT codes, including those generated from the isoniazid-latent TB infection claims algorithm.
With continuous enrollment and electronic health record diagnosis ≥12 months after SNOMED CT code.
Mapping conducted with Athena Software® (Waterloo, ON, Canada) (https://www.ohdsi.org/analytic-tools/athena-standardized-vocabularies/).
Codes from the Tennessee TB Elimination Program’s TB ICD-10 Codes Cheat Sheet.
— indicates the SNOMED CT term cannot be matched to ICD-10-CM code.
LTBI = latent TB infection; SNOMED CT = Systematized Nomenclature of Medicine–Clinical Terms; EHR = electronic health record; ICD-10-CM = International Statistical Classification of Diseases, 10th Revision, Clinical Modification; TST = tuberculin skin test; TB = tuberculosis.