Medi-Cal Dental replacement rules limit dentures and crowns to one covered replacement every five years, measured from the delivery date of the previous prosthetic. Earlier replacement is possible, but only under one of five specific exceptions and only when your dentist submits a Treatment Authorization Request with documentation that fits the exception. Most denials trace back to thin paperwork rather than ineligibility, so the work happens before the request is filed.
How the Five-Year Rule Works
The Department of Health Care Services considers a well-made denture or crown to have an expected functional life of five years. The clock starts on the delivery date of the existing appliance, not the impression date or claim date. Inside that window, the program still covers work that keeps the prosthetic usable: adjustments, repairs, and relines. A reline resurfaces the tissue-facing side of a denture and often restores fit without a full replacement, which is why DHCS expects those options to be tried before it approves a new device.
If a dentist bills for a new prosthetic before the five years are up without documenting an exception, the claim will be denied. The five-year interval is the default, and every request for earlier replacement has to overcome it explicitly.
The Five Exceptions to Early Replacement
DHCS recognizes five categories that justify replacing a prosthetic before the five-year mark. Each has its own evidence requirements.1Department of Health Care Services. Justification of Need for Prosthesis
Loss Beyond Your Control
Fire, natural disaster, and theft fall under this exception. You’ll need to show three things: that you still have a medical need for the prosthetic, a clear explanation of how the loss happened and why it was unavoidable, and a description of steps you’ll take to prevent a repeat. If a fire department, law enforcement agency, or other government responder documented the incident, include a copy of their report.
Surgical or Traumatic Loss of Oral Structure
Major oral surgery or facial trauma that changes the shape of your jaw or mouth qualifies. Bone removal, tumor resection, or a jaw fracture that alters how the appliance seats generally can’t be fixed with adjustment alone, and the clinical documentation should say so directly.
Prosthesis No Longer Serviceable
When the existing appliance has deteriorated past the point where repairs and relines can restore function, replacement is authorized. A clinical screening dentist has to confirm that the device cannot be salvaged. This is the exception that applies when a denture cracks, warps, or fails structurally sooner than expected.
Significant Medical Condition Affecting Fit
Some medical conditions change oral tissues enough that dentures stop fitting. Rapid weight loss, radiation therapy, and diseases affecting bone density are common examples. This exception requires documentation from two providers: a letter from your physician confirming the condition and supporting early replacement, and a statement from your dentist that the existing denture cannot be made functional through reline or adjustment. Ill-fitting dentures cause sores, make it hard to eat solid food, and can lead to nutritional problems, which is why the physician’s role in this exception is central.
Non-Catastrophic Loss
If you misplaced or lost your denture without a documented incident like a fire or theft, DHCS may still approve a replacement, but only twice in your lifetime. You’ll need a written explanation of what happened and a description of how you plan to safeguard the replacement. Requests beyond those two lifetime approvals have to be submitted under a separate procedure code and are evaluated individually. This is the exception where denials are most common, because the written justification often fails to explain why the loss was unavoidable or what has changed.
Documentation Every Request Needs
Regardless of which exception applies, your dentist has to provide clinical documentation supporting the request. That means recent X-rays and a written assessment explaining what is wrong with the current prosthetic and why repair, reline, or adjustment cannot restore function. Specifics matter. A note that reads “patient needs new dentures” almost always comes back for more information.
The outside documentation depends on the exception:
- Fire: a fire marshal’s or fire department report documenting the incident and property loss.
- Theft: a police report identifying the stolen property.
- Natural disaster: an official report from a responding government agency.
- Medical condition: a letter from the treating physician confirming the diagnosis and supporting early replacement, alongside the dentist’s clinical records.
- Non-catastrophic loss: a written explanation of the circumstances and the safeguards you’ll put in place.
How the Authorization Process Works
Your dentist starts the process by submitting a Treatment Authorization Request to the Medi-Cal Dental fiscal intermediary. The TAR bundles the clinical records, the dentist’s justification, any physician letters, and any official reports.
DHCS reviewers check whether the documentation actually supports the claimed exception and whether cheaper alternatives like relines were properly ruled out. If something is missing or unclear, the request typically gets sent back for more information rather than denied outright, which slows things down but keeps the door open. Both you and your dentist receive a written decision. An approval carries an authorization number the dentist uses to begin fabricating the new prosthetic. A denial spells out which criteria weren’t met.
If You’re Under 21
The five-year rule does not apply the same way to beneficiaries under 21. Federal law requires state Medicaid programs to provide Early and Periodic Screening, Diagnostic, and Treatment (EPSDT) services, which means California must cover any medically necessary dental service to correct or improve a health condition even when that service would otherwise be limited by standard frequency rules.2Medicaid and CHIP Payment and Access Commission. EPSDT in Medicaid
Prior authorization can still be required, but a hard five-year cap cannot override an individual determination of medical necessity. A child or teenager whose jaw is still developing may need adjustments or replacements more often than an adult, and EPSDT is the pathway that allows it. The dentist still has to document why the replacement is medically necessary.
Appealing a Denial
If your TAR is denied, the Notice of Action you receive explains how to request a state fair hearing. You have 90 days from the date you receive the notice to file.3Department of Health Care Services. Medi-Cal Fair Hearing Late filings are sometimes accepted for good cause, such as illness or a disability that prevented you from meeting the deadline, but that is not something to rely on.
The easiest way to file is to complete the hearing request form printed on the back of the Notice of Action. You can also send a separate written request. An administrative law judge reviews whether DHCS applied the replacement criteria correctly. Federal regulations require the state to reach a final decision within 90 days of receiving your hearing request, though unusual circumstances can extend that timeline.4eCFR. 42 CFR Part 431 Subpart E – Fair Hearings for Applicants and Beneficiaries
Appeals succeed most often when the original denial rested on missing or unclear documentation that you can now supply. If the dentist’s justification was vague or the physician letter wasn’t in the file, closing those gaps before the hearing does more than arguing the reviewer misread the record.
A Deadline Worth Knowing About
DHCS has announced changes to adult dental coverage taking effect July 1, 2026, which may limit covered services for some adult beneficiaries to emergency care only.5Department of Health Care Services. Medi-Cal Dental Benefit Changes The scope and eligibility details are still developing, and they could affect access to prosthetic replacements for adults. If you already have grounds for early replacement, it is worth talking with your dentist about the timing of the request. The DHCS site is the place to check for current information on who will be affected and which services remain covered.