2027 ICD-10-CM Diagnosis Code N73.9Female pelvic inflammatory disease, unspecified
ICD-10-CM Codes›N00–N99›N70-N77›N73
- Billable — Valid for Submission
- Not Chronic
N73.9 is a billable ICD-10-CM diagnosis code for female pelvic inflammatory disease, unspecified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 742 through 743, 757 through 759. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Inflammatory diseases of female pelvic organs.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Abscess of female pelvis
- Acute abscess of female pelvis
- Acute female pelvic inflammatory disease following procedure
- Acute on chronic pelvic inflammatory disease
- Acute pelvic inflammatory disease
- Bacterial genital infection
- Bacterial urogenital infection
- Chronic pelvic inflammatory disease
- Female genital infection
- Female genital tract infection
- Female pelvic inflammatory disease
- Female pelvic inflammatory disease caused by Mycoplasma genitalium
- Genital infection
- Genital mycoplasma infection
- Infection of female genital system following medically assisted reproduction
- Inflammatory disease of female genital structure
- Inflammatory disorder of genitourinary system
- Mycoplasma genitalium infection
- Mycoplasmal pelvic inflammatory disease
- Pathogen-negative nonspecific genital infection
- Pelvic inflammatory disease caused by Metamycoplasma hominis
- Postoperative abscess of female pelvis
- Postoperative intra-abdominal abscess
- Postprocedural intraabdominal abscess
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to N73.9: its own notes plus those printed at N73, block N70-N77, and Chapter 14. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Female pelvic infection or inflammation NOS
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Use Additional Code
Add a second code, after this one, to fully describe the condition.
Code Also
A second code may be needed to fully describe the condition; the note gives no sequencing direction.
- if applicable, pelvic abscess (K6A.0-)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name N73.9, its category, or a range that includes it.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Disease, diseased See Also: Syndrome;
female pelvic inflammatory See Also: Disease, pelvis, inflammatory; N73.9
inflammatory (female) N73.9
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Pelvic Inflammatory Disease
Pelvic inflammatory disease (PID) is an infection of the uterus, ovaries, and other female reproductive organs. PID causes scarring in these organs. This can lead to infertility, ectopic pregnancy, pelvic pain, abscesses (a collection of pus), and other serious problems.
The full article covers:
- What is pelvic inflammatory disease?
- What causes pelvic inflammatory disease?
- What are the symptoms of pelvic inflammatory disease?
- How is pelvic inflammatory disease diagnosed?
- What is the treatment for pelvic inflammatory disease?
- Can pelvic inflammatory disease be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert N73.9 to ICD-9-CMHistory
Code HistoryHistory
Questions About N73.9Overview
What is the ICD-10 code for female pelvic inflammatory disease, unspecified?
The ICD-10-CM code for female pelvic inflammatory disease, unspecified is N73.9 (sometimes written as N739). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is N73.9 (Other female pelvic inflammatory diseases) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report female pelvic inflammatory disease, unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does N73.9 group to?
When female pelvic inflammatory disease, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 742, 759, 743, 758, 757, with relative weights from 0.7687 to 1.8448 depending on complications. Higher weights mean higher Medicare reimbursement.
Can N73.9 be reported with O08.0?
Not as a rule. The Excludes1 note at block N70-N77, which applies to N73.9, lists "abortion or ectopic or molar pregnancy (O00-O07, O08.0)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
