Insurance · Updated 2026-09-08 · 5 min read

How often does insurance cover perio maintenance (D4910)?

One to four a year on published plans, most often two to four, and usually pooled with your cleanings. A documented history of periodontal therapy is the first gate.

One to four periodontal maintenance visits a year is the published range, and two to four is the usual band — one state programme publishes one a year, two federal brochures four. On roughly two thirds of the carriers and programmes whose own documents answer it they are not extra visits at all: they draw on the same allowance as the routine cleaning (D1110). The count is the second thing that decides whether the claim pays. The first is the precondition: perio maintenance is a benefit only after active periodontal therapy, and several carriers require that history to be on file, some within a stated recency window, before any visit pays whatever the counter says. Across the practices Kaylie serves in September 2026, perio maintenance lines were refused for frequency 8.8% of the time at Guardian, 6.6% at Cigna and 4.7% at Delta Dental — five to seven times the rate for an adult cleaning at the same carriers.

What we measured

Every claim line for that code at that carrier, paid and refused, measured September 2026 across at least fifteen practices per cell. The rate gap is consistent with plans that pool D4910 and D1110 into one cleaning allowance: the cleanings are taken first and the maintenance visit meets the exhausted counter.

What the carriers' own policies say

The count, pooled with cleanings, in the federal programmes: "D4910 Periodontal maintenance – Limited to 4 in 12 months combined with adult prophylaxis after the completion of active periodontal therapy" (MetLife Federal Dental Plan 2026 FEDVIP Brochure, OPM, 2026). And "D4910 Periodontal maintenance - Limit 4 during the calendar year combined with adult prophylaxis, and scaling in presence of generalized moderate or severe gingival inflammation, after the completion of active periodontal therapy" (2026 BCBS FEP Dental Official Brochure, OPM FEDVIP, 2026).

The precondition, which is a different refusal from the count. Cigna lists it under conditions in which the procedure is not allowable: "When there is no history of active periodontal therapy (D4210/D4211, D4240/D4241, D4260/D4261, or D4341/D4342)" (Cigna Dental Coverage Determination Guidelines — DPPO, 2026, Policy PERIO-20).

One carrier began enforcing that precondition on a stated date and closed the obvious workaround: "These claims will only be paid if there's a history of the periodontal therapy. We used to pay periodontal maintenance claims without requiring the history of the periodontal therapy. Beginning January 1, 2025, we started to pay periodontal maintenance claims only if we had the history of the periodontal therapy… Note that having billed previously for D4910 services doesn't constitute prior periodontal therapy" (Aetna Dental OfficeLink Updates, Spring/Summer 2025).

The precondition can also be a recency test rather than a one-off event: "History of periodontal therapy and continuous care not exceeding 12 months" (Periodontal Maintenance (2026 Policy), Anthem, 2026). A patient who lapses for more than a year drops out of maintenance status. Another carrier narrows the qualifying history to surgery: "Periodontal Maintenance: Patient history of periodontal surgery must be documented to support the benefit of D4910", with the qualifying window stated as the previous 24 months (BlueDental Coverage Guidelines, BCBS of Arizona, rev. 070118).

At the generous end, one state fee schedule pays it quarterly while leaving the plain cleaning at twice a year: "D4910 | Periodontal maintenance | … | 1 per 90 days" against "D1110 | Prophylaxis – adult | … | 1 per 180 days" (Pennsylvania Medical Assistance Dental Fee Schedule, PA DHS, effective 1 August 2025). A commercial certificate says the same in months and forbids mixing the two: "Periodontal cleanings: These are limited to once every 3 months, and are not to be combined with regular cleanings" (Delta Dental Individual and Family Premier Enhanced Subscriber Certificate, Massachusetts Health Connector). And at the tight end one state programme publishes a single visit a year: "Not payable with prophylaxis. Once per year in most cases." (ForwardHealth Online Handbook, Topic 2808, Wisconsin Medicaid.)

Why it depends on the plan

Whether D4910 has its own allowance is the single biggest driver of the number the patient hears. The carriers that give it a separate line are the third that do not pool it, and one carrier's product guide states four times over that periodontal maintenance does not count against the two cleanings. One public-employee certificate gives two cleanings and four maintenance visits — six hygiene visits a year — while a federal brochure caps everything combined at four.

On top of the count and the precondition sit two more rules that refuse claims inside the limit. A same-day rule: at several carriers a routine cleaning billed on the same date as perio maintenance is not separately payable, and at some the difference is not billable to the patient either. And a blackout after therapy: one federation handbook makes fees for D4910 within 30 days of periodontal therapy by the same office not billable to the patient, and one clinical policy blocks the first maintenance visit within 90 days of the scaling.

What to do

• Before the first maintenance visit, confirm the carrier holds the active therapy in its history — not that the office has it in the chart. The two are different records and only one pays the claim.
• Ask whether the qualifying history has a recency window, and whether surgery is required or scaling and root planing is enough.
• Ask for the combined ceiling as well as the per-code count, and for the last date of service under both D4910 and D1110.
• Diary the interval, not the year. Where the plan pays one every three months or one every 90 days, the calendar is not the constraint.
• Check the blackout after periodontal therapy before scheduling the first maintenance visit. Where the claim falls inside it, the visit is not payable and at some carriers not billable either.
• Do not bill a routine cleaning on the same date as perio maintenance without checking the plan's same-day rule.

Numbers last refreshed September 2026.

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