MCMedicalCodingSoftware
S02.641B

S02.641B: Fracture of ramus of right mandible, initial encounter for open fracture

Billable / specific codeICD-10-CMright

S02.641B is a billable, specific ICD-10-CM code for fracture of ramus of right mandible, initial encounter for open fracture. It is valid for submission on a claim.

Check S02.641B with the rest of the claim: free scrubber

7th character "B": initial encounter for open fracture

The appropriate 7th character is to be added to each code from category S02

A
initial encounter for closed fracture
B
initial encounter for open fracture
D
subsequent encounter for fracture with routine healing
G
subsequent encounter for fracture with delayed healing
K
subsequent encounter for fracture with nonunion
S
sequela

Other codes that can never be billed with S02.641B

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • S01Open wound of head

Risk adjustment

S02.641B risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

  • HCC 399 Major Head Injury without Loss of Consciousness0.199 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.

Medicare coverage

S02.641B is named in 7 Medicare coverage policies: 7 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A54767Billing and Coding: Medicare Preventive Coverage for Certain Vaccines
  • A56612Billing and Coding: CT of the Head
  • A56729Billing and Coding: Magnetic Resonance Imaging of the Head and Neck
  • A56900Billing and Coding: Immunizations

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under S02.641

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.