D4910 Dental Code: Periodontal Maintenance Billing

The short version

# D4910 Dental Code: Periodontal Maintenance Billing

D4910 is the CDT code for ongoing periodontal maintenance after a patient completes active periodontal therapy. The visit removes deposits above and below the gumline, includes site-specific root planing when needed, and follows the patient's current periodontal condition. A plan can reduce or deny the benefit when it can't see the prior treatment history.

Bill D4910 after active periodontal treatment when the patient remains on a periodontal maintenance program.
D4910 doesn't expire clinically after a fixed number of months. The dentist sets the interval, but the benefit plan can impose its own waiting period, frequency, or history requirement.
D1110 is preventive care for a generally healthy periodontium. D4346 treats generalized gingival inflammation without attachment loss. D4910 follows treatment for periodontal disease.
Minnesota Medicaid allows D4910 once every 91 days for 730 days after a paid D4341 or D4342 line, then requires new authorized SRP before it pays D4910 again.
In a worked PPO example, a $180 fee becomes a $130 allowable. The plan pays $104 at 80%, the patient owes $26, and the office adjusts $50.
Send the prior periodontal treatment dates, current diagnosis, targeted probing, and current maintenance note when the payer doesn't hold the history.

What is D4910?

D4910 reports the maintenance visit for a patient who has completed periodontal therapy. It covers removal of plaque and calculus from areas above and below the gingiva, polishing, and localized root instrumentation where the current findings require it. The dentist reevaluates the tissues and considers new diagnosis or treatment when disease has returned.

Fact	D4910
CDT category	Periodontics
Unit	Full mouth, one maintenance visit
Required history	Completed periodontal therapy
Interval	Set from the clinical evaluation; benefit limits are separate
Public fee references	Oregon Medicaid: $105.25; DC Medicaid: $70, both published in 2025
Distinct from	Preventive prophylaxis and active periodontal treatment

The ADA's D4910 guidance says the patient's prior periodontal history is necessary for benefit review.

When do you bill D4910?

Bill D4910 when active periodontal treatment is complete and the dentist continues maintenance because the patient's history and current findings require periodontal care.

Confirm prior therapy such as D4341, D4342, or periodontal surgery in the chart.
Update the periodontal findings at the interval chosen by the dentist.
Remove deposits throughout the mouth and perform site-specific root planing where indicated.
Record new or recurring disease that needs separate diagnostic or active-treatment procedures.
Keep the clinical maintenance interval separate from the payer's covered frequency.

The ADA's D4346 guide makes one boundary explicit: D4346 doesn't lead to D4910 because D4346 treats gingivitis without attachment loss. D4910 follows therapy for a patient with periodontal disease history.

D4910 vs D1110 and D4346

Choose the service from the periodontal history and today's evaluation. The amount of stain or calculus doesn't change a maintenance patient into a prophy patient.

The treatment history separates preventive D1110 and gingivitis D4346 from periodontal maintenance D4910.

	D1110 preventive cleaning	D4346 gingivitis scaling	D4910
Patient history	No completed active periodontal therapy	Gingivitis without attachment loss	Completed periodontal therapy
Current purpose	Preventive removal of local irritants	Treat generalized moderate or severe inflammation	Maintain treated periodontal tissues
Root planing	Not part of the service	Not treatment for attachment loss	Site-specific root planing can be included
Common benefit class	Preventive	Varies by plan	Often a basic periodontal benefit
Oregon Medicaid fee	Not used here	$86.46	$105.25

Reporting D1110 because the plan won't cover D4910 changes the record of what was performed. The ADA tells offices to report the actual service and explain the plan limitation to the patient.

What does insurance actually do with D4910?

Plans use very different clocks for D4910. Minnesota Medicaid allows one visit every 91 days for 730 days after a paid D4341 or D4342 claim. After that period, D4910 isn't payable unless new authorized SRP occurs. A published Delta Dental California plan limits D4910 to members age 13 or older, once per calendar quarter, and only during the 24 months after active periodontal therapy. Those are plan examples, not CDT rules.

The ADA says many payers want an 8-to-12-week wait after active treatment, while some contracts limit how long the maintenance benefit continues. When a patient moves to a new payer, send the past periodontal treatment with the first D4910 claim because the new carrier won't have the old claims.

A $180 periodontal maintenance fee becomes a $130 allowable, with $104 paid by the plan, $26 owed by the patient, and $50 adjusted.

Office fee: $180
Contracted allowable: $130
Contractual adjustment: $50
Plan payment at 80%: $104
Patient coinsurance: $26

Why does D4910 get denied?

The payer has no record that the patient completed active periodontal therapy.
The visit falls before the plan's waiting period or inside its frequency interval.
The plan's covered maintenance period after SRP has ended.
The claim shares a date with D4341 or D4342, and the plan treats the maintenance as incompatible with active therapy.
The record doesn't include a current periodontal diagnosis or probing for the areas under maintenance.

Read the EOB before moving the full balance to the patient.

What documentation gets D4910 paid?

Identify the active periodontal treatment, treated quadrants or sites, and completion dates.
Record the current periodontal diagnosis and the dentist's maintenance interval.
Include targeted probing, bleeding, recession, mobility, furcation, and attachment findings where relevant.
Document deposits removed, areas treated below the gingiva, polishing, and any site-specific root planing.
Attach prior treatment records and current charting when the payer doesn't have the periodontal history.
Verify the last D1110, D4346, D4910, D4341, and D4342 dates against the plan's combined frequency rules.

Common questions about D4910

Does D4910 end two years after scaling and root planing?

No clinical two-year cutoff appears in the code's treatment logic. The dentist continues periodontal maintenance at intervals based on the patient's condition. Some benefits do end after a set period. Minnesota and one Delta plan both publish 24-month benefit periods, so separate the needed service from what the contract pays.

Can you alternate D4910 and D1110?

Don't alternate codes only to fit a benefit. Report the procedure supported by the patient's history and current care. A periodontal-maintenance patient remains D4910 unless the dentist documents a real change in status and treatment. A plan may pay an alternate D1110 benefit, but that's the payer's adjudication rather than the office's code selection.

Can implants be included in D4910?

The ADA's current description of periodontal maintenance includes the life of the dentition and implant replacements, but an implant with active mucositis or peri-implant disease can require a different procedure. Record the implant findings and report any distinct treatment separately when its criteria are met.

How often should a patient receive D4910?

The dentist sets the clinical interval after evaluating the patient's disease history and current risk. The ADA notes that many plans use an 8-to-12-week wait after active treatment. Minnesota then uses a 91-day frequency, while other plans use calendar-quarter or combined-cleaning limits. Check both the treatment plan and the benefit history.

Find the missing periodontal history

Don't resubmit D4910 until you've shown the active periodontal treatment and its completion date. If the history isn't clear, don't guess.

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