ICD code N75.9 – Bartholin gland disease, unspecified

Key takeaways

N75.9 is a valid, billable ICD-10-CM code for Bartholin gland disease when documentation can’t support a more specific N75 code.

Check N75.0 (cyst), N75.1 (abscess), and N75.8 (other) before assigning N75.9, which is a last-resort residual code.

Payers often deny N75.9 when the chart clearly supports a cyst or abscess, so a specificity review is the first denial-prevention step.

Clearinghouse edit checks in claims management software like Pabau catch CMS edit errors before submission, but choosing the specific N75 code stays with the coder.

ICD-10 Code N75.9: quick reference and code details

ICD-10 Code N75.9 is the billable diagnosis code for disease of Bartholin’s gland, unspecified. Use it only when the record documents a Bartholin gland condition but doesn’t identify a cyst, an abscess, or another named disease.

The code sits in category N75 (Diseases of Bartholin’s gland) in Chapter 14 of ICD-10-CM, which covers the genitourinary system (N00-N99). The table below captures the reference data coders need before billing.

The CDC/NCHS ICD-10-CM web tool confirms N75.9 as a valid billable code for FY2026, with no descriptor change from the prior year.

What N75.9 covers: clinical scope and the Bartholin gland

The Bartholin’s glands (also called the greater vestibular glands) are two small mucus-secreting glands located at the posterior introitus of the vagina. A blocked duct leads to a cyst, and infection turns a cyst or the gland itself into an abscess. Less often, the gland is inflamed without an abscess, or a tumor develops, and those conditions code outside N75.0 and N75.1.

N75.9 applies when the clinical record documents a Bartholin gland condition but lacks the detail to assign a more specific code in category N75. Common clinical presentations coded to N75.9 include:

• Bartholin gland inflammation without confirmed abscess formation
• Bartholin gland enlargement with no imaging or aspiration confirming cystic content
• Post-procedure Bartholin gland changes where the pathology report is pending
• Bartholin gland disorder documented generically in the note without cyst or abscess specification
• Recurrent Bartholin gland symptoms where the current episode has not yet been classified

“Unspecified” in N75.9 describes what the note records about the condition. Once examined, most Bartholin gland conditions turn out to be a cyst or an abscess. Defaulting to N75.9 without querying the provider is a coding error under the ICD-10-CM Official Guidelines.

N75.9 vs N75.0, N75.1, and N75.8: choosing the right code

Category N75 contains four codes, and N75.9 is always the last option. The table maps each code to its clinical trigger and explains when N75.9 is and is not appropriate.

The AAPC ICD-10-CM code lookup provides the full N75 category with its coding notes. Review all four codes before defaulting to N75.9. N75.8 catches named conditions, such as bartholinitis and Bartholin gland adenitis, that providers often describe without a cyst or abscess label.

Several of the codes that outrank N75.9 sit outside category N75 entirely. The decision order below pulls them into one sequence, so you can stop at the first code the record supports.

ICD-10-CM coding guidelines for N75.9: when unspecified codes are acceptable

Section I.B.5 of the ICD-10-CM Official Guidelines for Coding and Reporting allows an unspecified code only when the record can’t support a more specific one. This standard applies directly to N75.9.

Before assigning N75.9, work through this sequence:

1. Review the clinical note for cyst or abscess language. Terms like “fluctuant mass,” “I&D performed,” “purulent,” or “obstructed duct” support N75.1 or N75.0 respectively.
2. Check the procedure record. Marsupialization (CPT 56440) or incision and drainage (CPT 56420) in the procedure log implies N75.0 or N75.1, not N75.9.
3. Query the provider when the note is ambiguous. The AHA Coding Clinic supports provider queries to clarify documentation before defaulting to an unspecified code.
4. Check for N75.8 applicability when a named condition (bartholinitis, adenitis) is mentioned but not explicitly matched to N75.1 or N75.0.
5. Assign N75.9 only after steps 1-4 cannot yield a more specific code.

An unspecified code backed by a documented provider query holds up at audit. An unexamined default is the pattern payers and auditors flag.

Procedures associated with Bartholin gland conditions: CPT code pairings

Bartholin gland conditions are managed through several distinct procedures, each paired with a specific CPT code. The ICD-10 code used on the claim should match the confirmed diagnosis, not simply the procedure performed. Running every claim through claims management software with clearinghouse edit checks catches formatting and edit errors before they reach the payer.

Pabau sends claims electronically through the Claim.MD clearinghouse, which runs standard CMS edit checks before transmission. That catches formatting and edit errors early and shortens the rework cycle for OB-GYN and women’s health practices. The clearinghouse won’t choose N75.0 over N75.9 for you, so the specificity check stays with the coder.

Documentation requirements to support N75.9

When N75.9 is the most specific code the record supports, the documentation must affirmatively demonstrate that specificity could not be determined. A note that simply says “Bartholin gland problem” without ruling out cyst or abscess will not survive payer review.

To support N75.9, the record should include all five of these elements:

• Confirmed anatomy: explicit reference to the Bartholin gland or greater vestibular gland, not just “vulvar mass” or “labial swelling”
• Absence of cyst/abscess differentiation: a statement or findings that rule out N75.0 and N75.1 for now. For example, “unable to determine cystic versus inflammatory etiology at this visit pending ultrasound.”
• Provider attestation: the treating clinician’s note, not just a triage entry or nursing assessment, must document the condition
• Diagnostic workup status: if imaging or aspiration is pending, document that the final diagnosis is deferred. Payers are more likely to accept N75.9 when the record shows a workup underway
• Prior encounter history: if this is a follow-up for a previously coded condition, confirm whether the diagnosis has changed or remains unresolved

A clean claim with N75.9 requires that all five documentation elements are present in the record before the claim leaves the practice. Missing any one of them creates an audit vulnerability even if the payer pays initially.

Common claim denial reasons for N75.9 and how to avoid them

Payers use automated edits to flag claims where an unspecified code appears when the procedure or clinical context implies specificity was achievable. For ICD-10 Code N75.9, the denial patterns are predictable and largely preventable. Each rejection comes back with a reason code, which you can look up in our guide to medical billing denial codes before you resubmit.

Effective denial management in healthcare for gynecologic practices requires tracking which CPT-to-ICD-10 pairings generate the most rejections. N75.9 paired with procedure codes that inherently imply a specific pathology is one of the highest-frequency correctable denial patterns in women’s health billing.

Most N75.9 specificity errors enter the revenue cycle at charge entry. A generic ICD-10 code is accepted there without a documentation review, and the error travels with the claim to adjudication.

Excludes notes and differential coding pitfalls

N75.9 has no Excludes notes of its own. The N70-N77 block that contains it carries an Excludes1 note for current obstetric complications (O00-O9A), and several neighboring codes are often confused with it:

• N76.x (Other inflammation of vagina and vulva): Vulvovaginitis, vulvitis, and vaginal inflammation code to the N76 block, not N75.x. A Bartholin gland inflammation with confirmed bartholinitis codes to N75.8, not N76.
• N90.x (Other noninflammatory disorders of vulva and perineum): Non-Bartholin vulvar cysts, such as epidermal inclusion cysts, belong here, not in N75. Skene’s (paraurethral) gland cysts code to N36.8 (Other specified disorders of urethra) instead.
• N94.x (Pain and other conditions associated with female genital organs): Vulvodynia and vulvar pain without a confirmed Bartholin gland etiology belong in N94, not N75.9.
• O23.x / O75.x (Obstetric codes): When a Bartholin gland abscess complicates pregnancy or delivery, use the Chapter 15 obstetric code rather than N75.1 or N75.9. The block’s Excludes1 note and AHA Coding Clinic guidance both point there.
• C51.x (Malignant neoplasm of vulva): Bartholin gland carcinoma codes to C51.0, and carcinoma in situ of the vulva codes to D07.1. Neither belongs in N75.

The WHO ICD-10 browser lets coders browse the N70-N77 block to confirm its boundaries. That helps keep inflammation-type diagnoses out of the wrong category.

N75.9 in obstetric and perinatal contexts

N75.9 is not used when a Bartholin gland condition complicates pregnancy, delivery, or the puerperium. AHA Coding Clinic guidance sends a Bartholin’s abscess during labor to O75.3 (Other infection during labor), not N75.1 or N75.9. If the abscess is found antepartum, it codes to O23.59- (O23.593 in the third trimester).

Practices providing maternity care need a clear code-routing rule. If the encounter is pregnancy-related and the Bartholin condition affects the obstetric episode, assign from Chapter 15. If the patient returns postpartum in a separate encounter for a Bartholin gland issue unrelated to the delivery, Chapter 14 codes (N75.x) apply.

The distinction matters at audit. An N75.9 claim for a labor-related infection instead of O75.3 signals a chapter-routing error that can affect medical necessity determinations and trigger retrospective review.

Is ICD-10 Code N75.9 billable in 2025 and 2026?

Yes, ICD-10 Code N75.9 is valid and billable for both FY2025 and FY2026. The FY2026 tabular list made no change to the N75.9 descriptor and added no new Excludes notes.

Coders should verify FY code validity annually using the CMS ICD-10 codes page, which publishes updated tabular lists and addenda each October. N75.9 has been a stable code since ICD-10-CM implementation and has not been subject to revision in recent years.

How Pabau supports clean Bartholin gland claims

In many OB-GYN practices, the coder reads the chart in one system and bills from another. A vague note gets keyed as N75.9, and the denial lands weeks later with the chart out of view.

Practice management software like Pabau keeps the clinical note, the diagnosis and procedure codes, and the claim in the same patient record. Claims go out electronically through the Claim.MD clearinghouse, and their status is tracked in one place.

When a Bartholin gland claim comes back, your coder can reread the note, query the provider, and resubmit with N75.0 or N75.1 without switching systems. That turns a multi-week denial cycle into a same-day correction.

Catch claim errors before the payer does

Pabau keeps the clinical note, codes, and claim in one patient record, and sends claims through Claim.MD edit checks before they reach the payer. See how OB-GYN practices cut rework on Bartholin gland claims.

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Conclusion

Treat N75.9 as the code you reach after a provider query, when the record still can’t name the condition. When the note, procedure log, or pathology report points to a cyst, an abscess, or bartholinitis, the specific code gets paid.

The trade-off is a few minutes of pre-bill review on each Bartholin gland claim, weighed against repeat denials on every drainage and marsupialization. Book a demo to see how Pabau keeps notes, codes, and claims together for your OB-GYN billing team.

Continue your research

Want to understand how clearinghouse validation works? Medical claims clearinghouse guide explains how clearinghouses catch errors before claims reach payers and how to choose one.

Looking to reduce denial rates across all codes? Denial management in healthcare outlines how billing teams track, appeal, and prevent claim rejections.

Need a checklist for first-pass acceptance? What makes a clean claim walks through the data every claim needs before it leaves the practice.

Checking your coding against payer rules? Medical billing compliance covers the documentation and audit standards that keep unspecified codes defensible.

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