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N73.1

N73.1Chronic parametritis and pelvic cellulitis

Billable / specific codeICD-10-CM

N73.1 is a billable, specific ICD-10-CM code for chronic parametritis and pelvic cellulitis. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

  • tuberculous parametritis and pelvic cellultis (A18.17)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Any condition in N73.0 specified as chronic

Risk adjustment

N73.1 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

N73.1 is named in 1 Medicare coverage policy 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

  • A56421Billing and Coding: CT of the Abdomen and Pelvis

How N73.1 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 N73.1.

  • Abscessbroad ligamentchronic
  • Abscessparametric, parametriumchronic
  • Disease, diseasedpelvis, pelvicinflammatorychronic

Related codes at this level

Codes that share N73. If N73.1 is not quite right, the correct code is usually one of these.

Questions about N73.1

Is N73.1 a billable ICD-10-CM code?
Yes. N73.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does N73.1 sit in the tabular list?
Diseases of the genitourinary system (N00-N99), in the block Inflammatory diseases of female pelvic organs (N70-N77).
What cannot be coded together with N73.1?
N73.1 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.
ICD-10-CMFY2026-Apr· effective April 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.