By FlowClaim RCM Editorial Team
E/M Coding: Medical Decision Making vs. Time
For many E/M visit families, level selection may use medical decision making or practitioner time. Choose the method the record actually supports and avoid mixing incomplete elements.
Medical decision making and time are two different pathways for selecting the level of many evaluation and management services. A practice can create coding risk when staff default to the higher result, count work that belongs to another service, or treat a long note as evidence of high complexity.
This guide offers a Medicare-focused E/M coding workflow for practice owners, clinicians, and coding managers. It does not select a code for a particular encounter or replace the current CPT E/M guidelines, CMS instructions, payer policies, or qualified coding judgment.
Confirm the E/M category before choosing a method
Identify the setting, patient status, provider, service, and code family. The available selection method is not identical for every E/M category. CMS's 2026 E/M services booklet notes that most E/M visit families allow level selection by MDM or time, while some services use only one method.
Do not copy office-visit rules to emergency department, critical care, or another family without checking the applicable guidance. Confirm that the service itself is covered and medically necessary, that the clinician may report it, and that all category-specific requirements are met before comparing levels.
Understand the MDM pathway
Medical decision making evaluates the documented complexity of problems addressed, data reviewed and analyzed, and risk of patient management under the current guidelines. The required combination of elements depends on the level. A diagnosis label by itself does not establish the complexity of how the condition was addressed.
The record should make the clinician's assessment and management understandable. Document relevant external information, independent interpretation, discussions, orders, medication decisions, and management risk when they actually occur and qualify. Avoid importing data that was not reviewed merely to enlarge the note.
Problems addressed
Focus on conditions evaluated or managed at the encounter. A long problem list is not the same as multiple addressed problems. Explain status and management where clinically appropriate. Do not count diagnoses that appear only in past history or a template without relevant work.
Data reviewed and analyzed
Apply current definitions and counting instructions. Orders and reviews may have specific grouping rules, and separately reported interpretations or services may not count again. Preserve the source and the clinician's actual work rather than asking coders to infer review from results copied into the note.
Risk of management
Assess the risk associated with patient management decisions made during the encounter under current guidance. Do not confuse the seriousness of a diagnosis with the documented management risk automatically. The clinician's plan should support the decision that drives the element.
Understand the time pathway
When the code family permits time, use the reporting physician's or qualified health professional's qualifying total time on the date of the encounter as defined by current guidance. CMS notes that the full time associated with the selected code must be met; the midpoint convention used for some other timed services does not apply.
Document total qualifying time when it is used for code selection. Start and stop times may be used, but a supported total is also recognized in CMS guidance. The record should still explain the service and medical necessity. Time is not a substitute for a clinically meaningful note.
Count qualifying activities once
Qualifying work can include preparing to see the patient, obtaining or reviewing appropriate history, performing a medically appropriate evaluation, counseling, ordering, referring, documenting, and certain care coordination or result interpretation when not separately reported. Use the definitions applicable to the service.
Do not count travel, general teaching, separately reported services, or time performed by staff when the rule counts only the reporting practitioner. Do not double-count simultaneous activities or the same period across services. For shared or split services, follow the separate CMS rules for distinct time and substantive portion.
Choose one supported path for the level
The record may contain both MDM and time information, but the final level should be supportable under the method used. Do not combine a partially supported MDM element with insufficient time to create a level that neither pathway independently meets.
A practical coding note can state “level selected by MDM” or “level selected by total time,” along with any internal review reference. This improves auditability without replacing the clinical record. If neither method supports the proposed code, correct the selection rather than adding boilerplate.
Hypothetical MDM example
A clinician spends a relatively short time on a visit but addresses a problem and makes management decisions that meet the applicable MDM level. If the code family permits MDM selection and the record supports the required elements, the level may be chosen by MDM without stretching the recorded time.
Hypothetical time example
A clinician performs extensive qualifying review, counseling, coordination, and documentation on the encounter date, while MDM alone would support a different level. If the category allows time and the documented qualifying total meets the threshold, time may support the selection. These examples omit details and are not coding determinations.
Handle same-day separately reported services
Exclude time spent performing another separately reported service from E/M time. When an E/M service occurs with a procedure, also determine whether the E/M is separately reportable at all. Modifier 25 does not permit double-counting and does not convert routine procedural work into an E/M service.
Use the Modifier 25 documentation checklist for same-day review. Keep the decision about separate reporting distinct from the decision about E/M level. Both must be supported.
Build a pre-bill audit
- Correct E/M category and eligible reporting professional.
- Medical necessity and service requirements supported.
- Selection method identified as MDM or time.
- Required MDM elements or full qualifying time documented.
- Separately reported work excluded from both pathways as applicable.
- Modifiers, payer edits, and service-specific rules reviewed separately.
Sample services across clinicians and levels, including claims that paid. Compare the selected method with the record and current guidance. Track specific findings—such as counting nonqualifying time or inactive problems—rather than labeling every variance “insufficient documentation.”
Calibrate coders and clinicians with complete cases
Use de-identified or synthetic examples representing different visit families, selection methods, and levels. Have reviewers independently identify the category, method, supporting elements, and unresolved questions, then compare results against current guidance. The purpose is consistent reasoning, not memorizing an answer from one sample.
When reviewers disagree, record the source of the difference. It may involve what problem was addressed, whether data qualifies, how management risk is interpreted, or which time activity counts. Update controlled education only after resolving the issue with an authoritative source. A single payer's payment does not settle the coding question.
Frequently asked questions
Can staff choose whichever method gives the higher code?
Use a method allowed for the category and supported by the actual record. The code must reflect the service and medical necessity. A higher result is not appropriate when its required elements or time are absent.
Does a detailed history increase the E/M level?
For categories using the current framework, history and examination should be medically appropriate but may not determine level. Confirm the specific family and use its current selection rules.
Can procedure time count toward E/M time?
Not when the procedure is separately reported. Exclude separately reported service time and follow the applicable rules for the E/M category and same-day combination.
Make the selection reproducible
FlowClaim's medical coding services and billing audit support can help practices review E/M patterns. Contact FlowClaim to discuss a focused MDM and time audit.