SEM Scanning and eCQM HH-PI Documentation

As hospitals prepare for electronic clinical quality measure reporting for Hospital Harm—Pressure Injury (eCQM CMS826), clinical teams are asking an important question:

Can sub-epidermal moisture (SEM) assessment support present on admission documentation?

The answer is YES. SEM assessment has a direct, evidence-based connection to pressure injury documentation and coding when its findings are interpreted within the complete clinical picture, diagnosed and documented by an appropriately qualified clinician.

This distinction matters. Accurate present on admission (POA) documentation requires healthcare providers to differentiate pressure-related tissue damage that existed at admission from pressure injuries that started during the hospital stay. This also improves the quality and consistency of the structured clinical data used for coding, quality reporting, and eCQM measurement.

The pathway for using SEM Delta data for POA documentation is:

• An elevated SEM delta (≥ 0.6) on admission equals objective evidence supporting pressure-induced persistent focal edema.
  • Elevated delta on admission represents a non-visible stage 1¹
  • 3 sequential escalating deltas represent a non-visible DTPI²
• The provider can use the elevated SEM Deltas/persistent focal edema to support documentation of the pressure injury diagnosis, stage, site, and POA status.³
  • POA Y: One elevated delta on admission
  • POA W: Pending three escalating deltas preceding a DTPI
• The coder then assigns the appropriate L89 code, SEM procedure code, and POA status.
  • ICD-10-CM L89.9: (Stage 1) pressure injury includes pre-ulcer skin changes limited to persistent focal edema.⁴
  • ICD-10 PCS XX2KXP9: Monitoring of Interstitial Fluid Volume, Sub-Epidermal Moisture using Electrical Biocapacitance, External Approach, New Technology Group 9⁵

(1. Brunetti et al, 2023; 2. Lustig et al, 2022; 3. CMS, 2026; 4. CDC, 2026; 5. AAPC, 2026)

This documentation and coding pathway is specific to SEM scanning and does not apply to other noninvasive technologies. SEM measures a validated pressure injury biomarker (SEM or persistent focal edema) and is supported by regulatory authorization, clinical evidence, validated criteria, standardized labeling, and coding recognition that are specific to pressure injury management.

Here’s Dr. Rhonda Sullivan explaining the details in a short video:

Why visible skin assessment may not tell the whole story

Traditional skin assessment relies heavily on changes that clinicians can see or feel. Pressure-related tissue damage, however, can begin beneath intact skin before visible signs appear.

SEM assessment measures changes associated with pressure-induced persistent focal edema. By detecting these physiological changes at a specific anatomical site, SEM scanning can provide objective information about tissue health even when the skin’s surface appears intact.

This creates an important opportunity at admission. Rather than waiting for visible deterioration, clinicians can identify evidence consistent with developing pressure-related damage, evaluate it alongside the patient’s history and condition, and document their clinical conclusions promptly.

SEM assessment does not replace clinical judgment. It strengthens that judgment by adding an objective, site-specific data point to the assessment.

The significance of the SEM Delta

The SEM Delta represents the difference between tissue measurements collected around an anatomical location. An elevated result indicates a localized variation in sub-epidermal moisture consistent with persistent focal edema.

According to the pathway discussed in the presentation, an admission SEM Delta of 0.6 or greater provides objective, site-specific evidence of pressure-induced persistent focal edema.

The pattern of results can support different clinical documentation decisions:

• A single elevated SEM Delta may support documentation of a non-visible Stage 1 pressure injury when the result is consistent with the complete clinical assessment.
• Three sequentially escalating SEM Delta values may support documentation of a deep tissue pressure injury when interpreted within the broader clinical picture.

These findings should not be treated as isolated, automatically generated diagnoses. The clinician must consider the SEM results alongside factors such as the patient’s history, pressure exposure, mobility, perfusion, skin and tissue assessment, anatomical location, and other relevant findings.

The central principle is straightforward: SEM supplies objective evidence, while the permitted clinician interprets that evidence and establishes the diagnosis.

HH-PI POA documentation windows are tight

For Stage 2, Stage 3, Stage 4, and unstageable pressure injuries must be documented within 24 hours.

Deep tissue pressure injuries have a window of 72 hours.

For example, if a patient arrived through the emergency department and was admitted to inpatient status within one hour of ED discharge, the clock does not start at inpatient admission, it reverts to the beginning of the ED encounter. A patient who boarded in the ED for nine hours leaves the receiving unit with fifteen hours, not twenty-four, for documentation.

A practical documentation and coding pathway

The pathway from an admission SEM assessment to structured eCQM data can be understood as a series of connected clinical and administrative steps.

1. Conduct the admission assessment

The patient receives a comprehensive skin and tissue assessment as part of the admission process. SEM scanning is performed at the applicable anatomical sites in accordance with the device’s instructions and the organization’s clinical protocol.

Performing the scan early is important because the timing of the assessment helps establish whether evidence of tissue damage was present at the beginning of the encounter.

2. Review the SEM findings

The clinician reviews the site-specific SEM Delta values. An elevated SEM Delta can provide objective evidence of persistent focal edema before visible skin changes develop.

The clinician should consider both the value itself and, when multiple assessments are available, the pattern of change over the next few days.

3. Interpret the complete clinical picture

SEM findings are evaluated together with the rest of the patient assessment. Relevant information may include:

• The condition of the skin and underlying tissue
• The anatomical location of the finding
• Recent immobility or sustained pressure exposure
• Perfusion and circulatory status
• Moisture, temperature, and tissue consistency
• Existing wounds or areas of discoloration
• Relevant diagnoses, comorbidities, and risk factors
• The timing and trend of SEM results

This step connects the objective measurement to a defensible clinical conclusion.

4. Document the diagnosis and POA status

A provider or another clinician permitted to establish the diagnosis under applicable coding guidance documents the relevant clinical details.

Complete documentation should clearly identify:

• The pressure injury diagnosis
• The stage
• The anatomical site and laterality, when applicable
• Whether the condition was present on admission
• The clinical findings supporting the conclusion

SEM results can form an important part of this supporting evidence, particularly when the pressure-related tissue damage is not yet visible.

5. Assign the appropriate code

The coding professional reviews the clinician’s documentation and assigns the applicable L89 pressure injury code and POA indicator.

The coder does not independently interpret the SEM result or establish the diagnosis. Coding follows the diagnosis documented by the authorized clinician.

This separation of responsibilities is essential: SEM provides objective clinical information, the clinician documents the diagnosis, and the coder translates that documentation into the appropriate coded data.

How SEM data can support eCQM HH-PI reporting

One of the operational advantages of connected SEM scanning is that SEM Delta data can be transferred into discrete fields within the electronic health record.

Discrete data is much easier to search, retrieve, and analyze than information buried in narrative notes or scanned documents. When implemented effectively, structured SEM data can help an organization:

• Locate admission assessments more efficiently
• Review SEM results by patient, anatomical site, unit, or date
• Connect objective findings to clinical documentation
• Support POA and hospital-acquired pressure injury reviews
• Examine adherence to assessment protocols
• Prepare evidence for quality and coding audits
• Query relevant information for eCQM workflows
• Identify patterns and opportunities for clinical improvement

Structured data does not eliminate the need for complete clinical documentation. Instead, it makes the supporting evidence more consistent and gives quality, informatics, clinical, and coding teams a shared source of objective information.

Why present-on-admission documentation matters

For eCQM HH-PI, the distinction between a pressure injury that was already present when the patient entered the hospital and one that developed during the encounter is consequential.

If early tissue damage is not visible or is not documented until visible deterioration occurs, the timing of that injury may become difficult to establish. This can create uncertainty during coding reviews, quality investigations, and performance reporting.

Admission SEM scanning can help close this information gap by creating an objective, time-stamped record of site-specific tissue findings. When those findings are assessed and documented appropriately, they can help the care team establish that pressure-related tissue changes existed at admission, even if the skin had not yet visibly deteriorated.

This supports more than reporting accuracy. Earlier recognition gives clinicians an opportunity to intensify prevention measures before the injury progresses.

POA documentation specific to SEM assessment

The documentation and coding pathway described here is specific to SEM assessment. It should not automatically be applied to every technology that examines skin or underlying tissue noninvasively.

SEM measures a validated biomarker associated with developing pressure injury: sub-epidermal moisture related to persistent focal edema. Its role is supported by device-specific regulatory authorization, established assessment criteria, clinical evidence, standardized labeling, and pressure injury–related coding recognition.

Other noninvasive technologies may measure different properties or produce different forms of information. Unless a technology has comparable authorization, validated criteria, supporting evidence, and relevant coding recognition, its results should not be assumed to support the same pathway.

The distinction is not simply that SEM provides another image or observation. It provides a standardized measurement of a physiological biomarker associated with pressure-related tissue damage beneath intact skin.

Building an implementation-ready workflow

Hospitals seeking to use SEM data in support of eCQM HH-PI documentation should bring clinical, coding, informatics, and quality teams together. A reliable workflow should define:

1. Which patients and anatomical sites will be scanned at admission
2. How soon after arrival the assessment must be completed
3. Where SEM values will appear in the EHR
4. Which findings require clinical escalation or reassessment
5. Who is authorized to document the pressure injury diagnosis
6. How stage, site, laterality, and POA status must be recorded
7. How coders will locate the supporting clinical documentation
8. How quality teams will retrieve structured data for eCQM review
9. How documentation completeness and protocol adherence will be audited

Education should extend beyond operating the scanner. Clinicians need to understand how to interpret SEM findings within the clinical picture and document their conclusions clearly. Coders need to understand where the supporting documentation resides. Informatics teams need to ensure that results flow into usable fields. Quality leaders need a repeatable method for validating the data.

Organizations should also align their workflows with current device labeling, official coding guidance, payer requirements, and internal policies.

From early detection to defensible documentation

SEM scanning can connect three priorities that have too often been addressed separately: early detection, pressure injury prevention, and documentation quality.

At admission, SEM can reveal objective evidence of pressure-related tissue changes before visible breakdown occurs. When a qualified clinician interprets those findings alongside the complete assessment and documents the diagnosis, stage, site, and POA status, the information can support the coding process. When SEM results are also captured in discrete EHR fields, they become accessible for quality review and eCQM workflows.

The result is a clearer chain of evidence:

Objective admission assessment → clinical interpretation → complete diagnosis and POA documentation → accurate coding → accessible eCQM data

For hospitals preparing for eCQM HH-PI reporting, the opportunity is not merely to add another assessment tool. It is to build a more objective and connected system for recognizing pressure-related tissue damage, acting earlier, documenting what was present when the patient arrived, and most importantly to eliminate preventable patient harm.

This article is intended for general educational purposes. Healthcare organizations should confirm documentation and coding practices against current official guidance, applicable regulations, device labeling, and organizational policy.