MCMedicalCodingSoftware
T48.6X5A

T48.6X5A: Adverse effect of antiasthmatics, initial encounter

Billable / specific codeICD-10-CM

T48.6X5A is a billable, specific ICD-10-CM code for adverse effect of antiasthmatics, initial encounter. It is valid for submission on a claim.

Check T48.6X5A with the rest of the claim: free scrubber

7th character "A": initial encounter

The appropriate 7th character is to be added to each code from category T48

A
initial encounter
D
subsequent encounter
S
sequela

Excludes1 inherited from the categories above T48.6X5A

A category’s note binds every code beneath it.

Written on T48.6: Poisoning by, adverse effect of and underdosing of antiasthmatics, not elsewhere classified

  • poisoning by, adverse effect of and underdosing of beta-adrenoreceptor agonists not used in asthma therapy (T44.5)
  • poisoning by, adverse effect of and underdosing of anterior pituitary [adenohypophyseal] hormones (T38.8)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

T48.6X5A is named in 21 Medicare coverage policies: 21 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A56538Billing and Coding: Allergen Immunotherapy
  • A56558Billing and Coding: Allergy Testing
  • A56612Billing and Coding: CT of the Head
  • A56844Billing and Coding: RAST Type Tests

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under T48.6X5

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.