ICD code M27.3 – Alveolitis of jaws

Key takeaways

M27.3 is the billable ICD-10-CM code for alveolitis of jaws, effective October 1, 2025.

Dry socket and alveolar osteitis are the two official synonyms, so the note must name one of them.

M27.3 covers socket-specific inflammation, while M27.2 covers wider jaw conditions such as osteomyelitis.

Five documentation elements decide whether an M27.3 claim survives a payer audit.

Pabau links the clinical note to claim submission, so the code you document is the code you bill.

ICD-10 Code M27.3: Code details at a glance

ICD-10 Code M27.3 is the billable diagnosis code for alveolitis of jaws, the condition most practices chart as dry socket. It sits in the M27 category, other diseases of jaws, inside chapter M00-M99 of the WHO ICD-10 classification system. The US adaptation of that system is ICD-10-CM.

The table below captures every reference field a coder needs before assigning the code.

What is alveolitis of the jaws?

Alveolitis of the jaws is inflammation of the alveolar bone socket. It occurs when the protective blood clot that normally forms after a tooth extraction dissolves or never develops. That leaves the underlying bone and nerve endings exposed to the oral environment.

The result is severe, poorly localized pain that usually begins two to four days after the extraction. It is far worse than what the patient reported in the immediate post-operative period.

The pathophysiology matters for coding because the condition has to be documented as a distinct diagnosis, not as post-extraction soreness. Clinicians should record the absent clot, the exposed bone, and the radiating pain pattern that supports M27.3.

Approximate synonyms mapped to M27.3

The official ICD-10-CM tabular index lists two approximate synonyms for M27.3:

• Dry socket
• Alveolar osteitis

Practices also chart the same condition under informal variants. These are not index entries, but they describe alveolitis of the jaws and point to the same code:

• Post-extraction dry socket
• Localized osteitis of the jaw
• Alveolar alveolitis
• Jaw alveolitis

When a patient chart uses any of these terms, M27.3 is the correct ICD-10-CM code. The documentation signal is that the note names the condition, rather than recording “pain after extraction.”

When to use ICD-10 code M27.3: Clinical scenarios

ICD-10 code M27.3 applies when the clinical record documents alveolitis as an active, confirmed diagnosis. Tooth extraction is the most common trigger. The code can still be assigned whenever alveolitis of the jaw is the treating provider’s stated diagnosis, whatever the cause. The CMS ICD-10-CM coding guidance asks coders to reflect the condition the encounter is chiefly treating.

Clinical scenarios that warrant M27.3:

• Post-extraction dry socket: the patient returns two to five days after a molar extraction. The socket shows exposed bone, foul odor, and radiating jaw pain that analgesics do not touch
• Dry socket after impacted wisdom tooth removal: common after surgical extractions, so document the failed clot and the bone exposure
• Alveolar osteitis with no extraction history: less common, so confirm the diagnosis clinically before assigning M27.3
• Follow-up visit for confirmed alveolitis: assign M27.3 as the primary diagnosis at each return visit while irrigation or packing is the focus of care

Do not assign M27.3 for generalized post-extraction discomfort or expected healing tenderness. The record must show a provider assessment naming alveolitis, or one of its synonyms, as the active condition.

Coding guidelines and documentation requirements for M27.3

The CDC/NCHS ICD-10-CM official coding tool and the annual ICD-10-CM Official Guidelines for Coding and Reporting govern how M27.3 is assigned. The clinical record needs all five elements below before the code can be assigned with confidence.

A note that records only “patient returned with dry socket, irrigated and packed” leaves out the clinical findings and the affected site. An auditor reads both omissions as unsupported coding, so capturing all five elements protects the practice.

Related ICD-10 codes in the M27 category

M27.3 sits within the M27 parent category alongside several sibling codes covering other jaw conditions. Picking the wrong sibling is the most common error on this code. The table below shows every M27 sibling with its descriptor and its coding distinction from M27.3.

M27.3 vs M27.2: How to differentiate

M27.2 and M27.3 are the two codes coders confuse most often in this category. The split comes down to what the note names. M27.3 is correct when the record specifically states alveolitis, dry socket, or alveolar osteitis. M27.2 covers the wider jaw conditions in its own descriptor, where alveolitis is not the documented diagnosis.

ICD-10-CM guidelines direct coders to assign the most specific code available. Where the documentation is clear, M27.3 beats M27.2 for alveolitis. Where the note says only “jaw infection” or “jaw inflammation”, M27.2 may be the right choice until the treating provider clarifies.

How to code post-extraction alveolitis, step by step

Most M27.3 encounters follow a tooth extraction. Working the claim in a fixed sequence reduces errors and supports medical billing compliance. Per the AAPC ICD-10-CM code reference, a post-procedural complication is coded as the principal diagnosis when the encounter exists to treat it.

1. Confirm the diagnosis in the clinical record: the note must state alveolitis, dry socket, or alveolar osteitis as the active diagnosis. A possibility does not qualify
2. Identify the encounter type: a return visit specifically for alveolitis treatment is a new-problem encounter with M27.3 as the primary diagnosis, not a standard follow-up
3. Pair it with the right procedure code: D7310 and D7311 (alveoloplasty) are CDT codes from the ADA dental code set, not CPT. Dry socket treatment is billed with CDT codes too, and medical practices may need an unlisted oral code
4. Check payer-specific requirements: some payers want the prior extraction documented in the same claim encounter, so verify individual payer policies before submission
5. Submit with the documentation attached: include the clinical note confirming the five elements listed in the previous section

Billing and reimbursement for M27.3 claims

M27.3 is billable, but reimbursement varies by payer. Medical insurance covers post-extraction alveolitis when it follows a covered medical procedure. Dental coverage depends on the patient’s plan and on whether the extraction itself was a covered benefit. Verify coverage before submitting, and document medical necessity clearly.

Payers often deny M27.3 claims when the supporting documentation never separates alveolitis from routine post-operative recovery. Reviewing denial codes in medical billing helps billing staff spot patterns in M27.3 rejections before they turn into write-offs.

Practice management software like Pabau submits claims electronically through Claim.MD, a clearinghouse that reaches thousands of US payers. Eligibility is checked in real time before the claim leaves the practice, so a coverage problem surfaces while you can still act on it.

Three reasons account for most M27.3 rejections. The note never states the alveolitis diagnosis, the billed procedure does not match the stated diagnosis, or the payer enforces a complication window. Reading the remittance line by line is how billing staff recover that revenue instead of writing it off.

How Pabau supports accurate ICD-10 coding for dental and oral surgery practices

Accurate ICD-10 coding needs two pieces working together. The clinical note has to capture every required element at the point of care. The billing workflow then carries that note into the claim without manual re-entry. Where a coder has to chase the provider to learn whether the patient had dry socket or post-op pain, M27.3 denials climb.

Pabau’s claims management software connects the clinical note to ICD-10 code selection inside one platform, so the diagnosis reaches the claim as written. Structured intake forms capture patient history, the current complaint, and clinical findings in a consistent format that feeds the encounter note.

Documentation arrives complete, the billing team stops sending clarification requests, and the chart holds up at audit without pulling the treating provider back into it.

Reduce coding errors and claim denials

Pabau connects your clinical documentation to billing and electronic claim submission in one workflow. Code M27.3 accurately and the clean claim goes out the door.

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Conclusion

M27.3 is an easy code to assign and an easy one to lose at audit. The difference is never the extraction. It is whether the note names alveolitis, dry socket, or alveolar osteitis. The findings, the extraction history, the affected jaw, and the treatment have to sit alongside that name.

So treat the documentation template as the coding control, not the coder’s judgment after the fact. Practices that fix the note fix the denial rate with it. Book a demo to see how Pabau carries a dental or oral surgery note straight through to a clean M27.3 claim.

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