Is B97.34 a billable ICD-10-CM code?

Yes. B97.34 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does B97.34 sit in the tabular list?

Certain infectious and parasitic diseases (A00-B99), in the block Bacterial and viral infectious agents (B95-B97).

What cannot be coded together with B97.34?

B97.34 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above B97.34 (B97.3) and apply to it just the same.

B97.34

B97.34 — Human T-cell lymphotrophic virus, type II [HTLV-II] as the cause of diseases classified elsewhere

Billable / specific codeICD-10-CM

B97.34 is a billable, specific ICD-10-CM code for human t-cell lymphotrophic virus, type ii [htlv-ii] as the cause of diseases classified elsewhere. It is valid for submission on a claim.

Excludes1 inherited from the categories above B97.34

These are not written on B97.34, but they bind it: a note on a category applies to every code beneath it. Billing B97.34 with anything listed here is a denial.

Written on B97.3 — Retrovirus as the cause of diseases classified elsewhere

Human immunodeficiency virus [HIV] disease (B20)

Other codes that can never be billed with B97.34

These codes carry an Excludes1 note pointing at B97.34. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading B97.34 alone.

B34Viral infection of unspecified site

Risk adjustment

B97.34 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

B97.34 is named in 3 Medicare coverage policies — 3 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A55717Billing and Coding: Lab: Flow Cytometry
A56464Billing and Coding: Flow Cytometry
A57689Billing and Coding: Lab: Flow Cytometry

How B97.34 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to B97.34.

Human›T-cell lymphotropic virus›type-2 as cause of disease classified elsewhere(HTLV-II)
Retrovirus, as cause of disease classified elsewhere›human›T-cell lymphotropic›type II(HTLV-II)
Infection, infected, infective›retrovirus›as cause of disease classified elsewhere›human›T-cell lymphotropic›type II(HTLV-II)
Infection, infected, infective›virus, viral NOS›as cause of disease classified elsewhere›human›T-cell lymphotropic,›type II(HTLV-II)
Infection, infected, infective›virus, viral NOS›as cause of disease classified elsewhere›retrovirus›human›T-cell lymphotropic,›type II(HTLV-II)

Code history

B97.34 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share B97.3. If B97.34 is not quite right, the correct code is usually one of these.

Questions about B97.34

Is B97.34 a billable ICD-10-CM code?: Yes. B97.34 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does B97.34 sit in the tabular list?: Certain infectious and parasitic diseases (A00-B99), in the block Bacterial and viral infectious agents (B95-B97).
What cannot be coded together with B97.34?: B97.34 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above B97.34 (B97.3) and apply to it just the same.