N80.321 — Superficial endometriosis of the posterior cul-de-sac
N80.321 is a billable, specific ICD-10-CM code for superficial endometriosis of the posterior cul-de-sac. It is valid for submission on a claim.
Risk adjustment
N80.321 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
N80.321 is named in 6 Medicare coverage policies — 6 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52453Billing and Coding: Luteinizing Hormone-Releasing Hormone (LHRH) Analogs
- A52453Billing and Coding: Luteinizing Hormone-Releasing Hormone (LHRH) Analogs
- A56421Billing and Coding: CT of the Abdomen and Pelvis
- A59160Billing and Coding: Luteinizing Hormone-Releasing Hormone (LHRH) Analogs
How N80.321 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 N80.321.
- Endometriosis›cul-de-sac›posterior›superficial
Related codes at this level
Codes that share N80.32. If N80.321 is not quite right, the correct code is usually one of these.
Questions about N80.321
- Is N80.321 a billable ICD-10-CM code?
- Yes. N80.321 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does N80.321 sit in the tabular list?
- Diseases of the genitourinary system (N00-N99), in the block Noninflammatory disorders of female genital tract (N80-N98).