The short version
D0150 is the CDT code for a comprehensive oral evaluation that gives a new or returning patient a full diagnostic baseline and treatment plan. Established patients can also receive D0150 after a major health change or a long break from active care. Billing it as a routine recall can use the wrong benefit and leave the office with a denied exam. This guide covers the D0150 vs D0140, D0120, and D0180 decisions, provider-based limits, and the documentation behind the claim.
- Bill D0150 for a new patient's comprehensive evaluation, or for an established patient with a significant health change or at least three years away from active treatment.
- D0120 updates an established patient's status at a routine return. D0140 stays with one complaint. D0180 is the comprehensive periodontal evaluation for a patient with signs or symptoms of periodontal disease.
- A three-year rule isn't universal. Georgia Medicaid uses 36 months per servicing provider group for certain established patients, Minnesota Medicaid uses two years, and one 2026 Delta California plan allows the initial D0150 once per contract dentist.
- Don't bill D0150 and D0180 for the same comprehensive visit. Minnesota Medicaid excludes that same-day pair, and the named Delta plan includes D0180 with D0150.
- In a worked PPO example, a $165 office fee becomes a $120 contracted allowable. The eligible exam pays $120 at 100%, the patient owes $0, and the office posts a $45 contractual adjustment.
- Keep the updated health history, complete hard- and soft-tissue findings, periodontal findings, indicated oral cancer evaluation, diagnoses, images, and treatment plan in the chart.
What is D0150?
D0150 establishes or reestablishes the patient's full clinical baseline. The dentist reviews current health information, evaluates the mouth, reaches diagnoses, and creates the treatment plan. Delta Dental's clinical criteria describe oral evaluations as collecting the current and past information needed for diagnosis and treatment planning.
| Fact | D0150 |
|---|---|
| CDT category | Diagnostic, clinical oral evaluations |
| Scope | Comprehensive baseline across the mouth, not one isolated complaint |
| Patient status | New patient, or established patient when the clinical history supports a new baseline |
| Dentist's work | Evaluation, diagnosis, and treatment planning |
| Findings retained | Medical and dental history, hard and soft tissues, caries, periodontal condition, existing dentistry, and indicated oral cancer evaluation |
| Public fee reference | Washington, DC Medicaid listed $69 for age 21+ and $77.50 for patients under 21 as of May 17, 2025 |
The ADA's oral cancer resource identifies an oral cancer evaluation, when indicated, as part of D0150.
When do you bill D0150?
Bill D0150 when today's work creates a comprehensive diagnostic record and treatment plan. The ADA's 2025 coding guidance gives three patient situations that support the code:
- A new patient receives a comprehensive evaluation.
- An established patient has a significant change in health that calls for a new comprehensive assessment.
- An established patient returns after at least three years away from active treatment.
- The dentist evaluates the relevant hard and soft tissues, medical and dental history, caries and existing dentistry, occlusion, and periodontal condition.
Patient status doesn't override the work. A new patient seen only for one painful tooth can receive the D0140 problem-focused evaluation when that is all the dentist completes. An established patient can receive D0150 when the health change or return after a long absence makes a new comprehensive baseline necessary.
D0150 vs D0120, D0140, and D0180
Start with why the patient is being evaluated. Then match the code to the scope and the condition that directs the exam.
| D0120 | D0140 | D0150 | D0180 | |
|---|---|---|---|---|
| Deciding fact | Established patient returns for a routine status update | One specific problem or complaint | New or returning patient needs a full baseline and treatment plan | Patient has signs or symptoms of periodontal disease |
| Scope | Changes since the last comprehensive or periodic evaluation | Focused area and complaint | Comprehensive oral evaluation | Comprehensive periodontal evaluation |
| Typical result | Updated recall findings and plan | Diagnosis and next step for the complaint | Full diagnoses and sequenced treatment plan | Periodontal diagnosis and treatment plan |
| Published plan example | Georgia: one of D0120 or D0150 per six months | Georgia: not payable with D0150 on the same date | Georgia: 36 months per provider group for certain established patients | Minnesota: not payable with D0150 on the same date |
The hard D0150 vs D0180 choice comes when the new patient has periodontal findings. The ADA directs D0180 to new or established patients who show signs or symptoms of periodontal disease. If the dentist performs that periodontal evaluation, don't also submit D0150 for the same evaluation just because the patient is new.
The ADA's D4355 guide says D0150 can share a date with D4355 only when the complete evaluation was accomplished. D0180 follows D4355 later because the debridement must first make the periodontal evaluation possible.
What does insurance actually do with D0150?
Plans use different clocks and different provider units. Georgia Medicaid's 2025 manual allows D0150 for a new patient and uses a 36-month interval per servicing provider group for an established patient absent from active treatment for three years. A significant health change inside 36 months requires a report and approval. Minnesota Health Care Programs uses a two-year interval and asks for prior authorization with a rationale when D0150 is needed sooner.
One 2026 Delta Dental California plan lists the initial D0150 once per contract dentist and treats D0180 as included with it. Verify whether the benefit follows the rendering dentist, group, or patient before telling the front desk that a change of office resets the exam.
Here is a hypothetical PPO claim with a 100% diagnostic benefit. The actual percentage comes from the patient's plan.
- The office charge is $165.
- The PPO allowable is $120, leaving a $45 contractual adjustment.
- The example plan covers an eligible D0150 at 100% of the allowable, so the payment is $120.
- The patient's share is $0 while the service is eligible under this example benefit.
If the history shows a prior D0150 inside the plan's interval, the $120 payment can become $0. Read the EOB before moving the balance. The adjustment-posting guide separates patient responsibility from a contractual write-off.
The Washington, DC Medicaid schedule listed $69 for adults and $77.50 for patients under 21 as of May 17, 2025. That public rate is a dated reference, not a commercial average. Use FAIR Health Consumer for local cost context and the live PPO contract for the expected allowable.
Why does D0150 get denied?
D0150 denials usually come from an old exam in the history or a record that proves a different evaluation:
- The payer finds a prior D0150 inside its provider, group, or patient frequency period.
- The chart shows a routine established-patient update that supports D0120 instead of a new comprehensive baseline.
- The claim includes D0140, D0180, or another evaluation that the plan excludes on the same date.
- The record doesn't include the full findings, diagnoses, and treatment plan expected from a comprehensive evaluation.
- A significant health change supports an early D0150, but the claim lacks the report or authorization required by the plan.
What documentation gets D0150 paid?
The record needs to show the complete evaluation, not only that the patient was new:
- Update the medical and dental history, current medicines, allergies, and the reason for today's comprehensive evaluation.
- Record the extraoral and intraoral hard- and soft-tissue findings, including existing restorations, missing teeth, caries, and other abnormalities.
- Record the periodontal screening or charting that supports D0150, or use D0180 when the patient's periodontal signs and the completed service support that code.
- Record the indicated oral cancer evaluation and any finding that needs referral or follow-up.
- Identify the diagnostic images and tests used to reach the diagnoses. Keep the clinical reason for each image in the record.
- Finish with the diagnoses, risk findings, treatment options, and sequenced treatment plan discussed with the patient.
For an early D0150, the appeal or authorization request should name the health change, provider change, long gap in care, or other reason a new baseline was necessary. The claim-denial appeal guide shows how to place that reason before the attachments.
Common questions about D0150
Is D0150 only for new patients?
No. The ADA also supports D0150 for an established patient with a significant health change or an established patient who has been away from active treatment for at least three years. The chart must show why a new comprehensive baseline was needed.
Is D0150 covered once every three years?
Sometimes, but not as a universal rule. Georgia Medicaid uses 36 months per servicing provider group in its stated established-patient rule. Minnesota Medicaid uses two years, while one 2026 Delta California plan lists an initial D0150 once per contract dentist. Verify the exact clock and provider unit.
Can D0150 and D0180 be billed on the same date?
Don't report both for one comprehensive evaluation. Minnesota Medicaid excludes the same-day pair, and one 2026 Delta California plan includes D0180 with D0150. Select the evaluation actually completed: D0180 when periodontal signs or symptoms direct the comprehensive periodontal work, otherwise D0150 when its broader baseline fits.
Can a dentist bill D0150 after D0140?
Yes, when D0140 addressed one problem and a later visit completes the comprehensive evaluation. Coverage is separate from coding. Georgia Medicaid doesn't pay D0140 and D0150 on the same date, and other plans can apply their own interval or combination rule.
Check the next new-patient exam
Before tomorrow's new-patient block, compare each scheduled evaluation with the last exam date, the rendering provider, and any periodontal history. Change the code only when the planned clinical scope changes. Autumn keeps the benefit history and supporting chart details together while your team prepares the claim.
Sources
- ADA News, six CDT codes you should know
- Delta Dental, clinical criteria for oral evaluations
- ADA, head and neck cancer and oral evaluation
- ADA, Guide to Reporting Full Mouth Debridement
- Georgia Medicaid, dental services manual and fee schedule
- Minnesota Health Care Programs, Dental Services
- Delta Dental, 2026 California plan benefits and limitations
- Washington, DC Medicaid fee schedule, May 17, 2025
- FAIR Health Consumer, dental cost lookup
CDT codes and nomenclature are copyright © American Dental Association. This guide explains the code in plain language; the current CDT manual is the authoritative source.
