R43.1 ICD-10-CM Code: Parosmia
HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99) / Symptoms and signs involving cognition, perception, emotional state and behavior (R40-R46)
R43.1
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceParosmia
A distorted or altered sense of smell where odors are perceived as different from normal, often unpleasant.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
N/A—
Not mapped
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for R43.1 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for R43.1 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for R43.1 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for R43.1 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for R43.1 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for R43.1 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for R43.1 in this effective period.
Buddy Documentation Tip
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is R43.1 an HCC code?
No. R43.1 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- R43.1
- Description
- Parosmia
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF
- —
- Billable
- Yes
- Payment year
- 2026
Coder workflow notes
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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
R43.1 is the ICD-10-CM diagnosis code for parosmia. A distorted or altered sense of smell where odors are perceived as different from normal, often unpleasant. R43.1 sits in the ICD-10-CM chapter for symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (r00-r99), within the section covering symptoms and signs involving cognition, perception, emotional state and behavior (r40-r46).
R43.1 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
Document the specific odors affected and whether the distortion is constant or intermittent.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for R43.1 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Document the specific odors affected and whether the distortion is constant or intermittent
- •Often associated with olfactory nerve damage, head trauma, or neurological conditions