Home Health Agencies: Here's Why PDGM Payments Keep Falling Short

Home health agencies can provide the right care, submit claims on time, and still see Medicare reimbursement come in lower than expected.

The reason is often not simply a billing error. Under the Patient-Driven Groupings Model (PDGM), reimbursement depends on several factors, including the patient's clinical characteristics, functional needs, comorbidities, timing of the period, and whether the period meets the requirements for a full 30-day payment.

For 2026, CMS also finalized changes to PDGM case-mix weights, functional impairment levels, comorbidity adjustment subgroups, and Low-Utilization Payment Adjustment (LUPA) thresholds. CMS also finalized permanent and temporary payment adjustments for home health.

That means a reimbursement drop deserves more than a quick review of the claim amount.

The real question is: What changed between the care provided and the payment received?

How PDGM Determines Home Health Payment

PDGM uses a 30-day period of care rather than the older 60-day episode structure. Each period is assigned to one of 432 case-mix groups based on patient and care characteristics.

CMS explains that PDGM payment categories consider clinical characteristics and resource needs. The case-mix weight assigned to a period affects the payment amount, while geographic wage differences also affect the final payment.

Several factors can therefore influence reimbursement:

• Admission source
• Timing of the period
• Clinical grouping
• Functional impairment
• Comorbidity adjustment
• Case-mix weight
• LUPA status
• Wage index
• Outlier payment rules
• Documentation and coding accuracy

If one of these elements is different from what the agency expected, the payment can also be different.

1. Your Patient's Case-Mix Assignment May Be Different

One of the first areas to review when reimbursement falls is the PDGM case-mix assignment.

A patient may appear clinically similar to previous patients, but the claim can still fall into a different payment category because of differences in diagnosis coding, clinical grouping, functional impairment, or comorbidities.

For example, an agency may expect a certain payment based on the patient's overall condition, while the final claim reflects a different combination of coded diagnoses or functional characteristics.

This is why comparing only the total reimbursement amount is not enough.

The agency should compare the expected and actual PDGM grouping and determine what specifically changed.

For a deeper look at this issue, see why home health PDGM reimbursement can drop even when patient acuity has not changed.

2. 2026 PDGM Changes Can Affect Your Expected Payment

Home health agencies also need to account for the payment changes that became effective in 2026.

CMS finalized recalibrated PDGM case-mix weights and updated LUPA thresholds, functional impairment levels, and comorbidity adjustment subgroups for CY 2026.

CMS also finalized a 2.4% payment update, along with a -1.023% permanent adjustment and a -3.0% temporary adjustment to the 2026 home health payment rate. CMS estimated that Medicare payments to home health agencies would decrease in aggregate by approximately 1.3%, or $220 million, compared with 2025 under the finalized policies.

This matters because an agency may see lower reimbursement even when its overall patient population and volume have not changed dramatically.

However, a broad payment-policy change should not be used to explain every individual payment reduction.

If one agency's payment is consistently lower than expected, claim-level analysis is still necessary.

3. LUPA Can Reduce the Expected Payment

LUPA is another important reason a home health payment may fall short.

CMS states that home health agencies receive a 30-day period payment when the period meets the applicable visit threshold. Periods that do not meet the threshold are paid using per-visit rates instead.

This creates a practical revenue risk.

If an agency expects a full 30-day payment but the period becomes subject to LUPA, the final reimbursement can be significantly different from the expected amount.

Agencies should therefore monitor:

• Visits planned versus visits completed
• LUPA thresholds
• Changes in patient condition
• Missed or cancelled visits
• Start-of-care timing
• Documentation supporting the services provided

A recurring LUPA pattern may point to an operational issue rather than an isolated billing problem.

4. Documentation and Coding Can Change the Payment Picture

PDGM depends heavily on the information reported for the patient.

If documentation does not clearly support the diagnoses, functional status, comorbidities, or clinical circumstances reported on the claim, the agency may have difficulty supporting the payment it expected.

Coding should therefore not be treated as a simple administrative step.

The billing team should compare the clinical documentation with the codes submitted and the resulting PDGM grouping.

Common areas to review include:

• Primary diagnosis selection
• Secondary diagnoses
• Clinical grouping
• Comorbidity coding
• Functional impairment information
• Timing and admission source
• Plan of care documentation
• Face-to-face documentation

The goal is not to add diagnoses simply to increase reimbursement. The goal is to make sure the claim accurately represents the patient's documented condition and the services provided.

5. Timing Can Also Affect Reimbursement

PDGM distinguishes between early and later periods of care.

That means the timing of a period can affect how it is grouped and paid.

Agencies should pay attention to whether a patient is entering a new period, whether the period is considered early or later, and whether the claim information accurately reflects the patient's episode history.

A timing-related error can be easy to miss when the billing team focuses primarily on the claim's dollar amount.

Reviewing the PDGM grouping information alongside the patient's episode history can help identify these problems.

6. Wage Index and Geographic Factors Matter

Home health payment is also adjusted for geographic wage differences.

This means two agencies providing similar services to similar patients may not necessarily receive the same payment amount if they operate in different wage areas.

For agencies with multiple locations, changes in geographic payment factors should be considered when comparing reimbursement across branches.

A sudden difference between locations does not automatically mean that one branch has a billing problem. The agency should first determine whether the difference is related to payment methodology, patient mix, coding, LUPA, or another operational factor.

7. Outlier and Partial-Period Payments Need Review

Not every home health period follows the standard payment pattern.

Certain situations can result in different payment calculations, including outlier situations and partial-period circumstances.

CMS continues to update the factors used in the home health payment system, including the fixed-dollar loss ratio used for outlier payments.

If an agency regularly treats patients with complex or high-cost needs, it should understand how these payment rules affect the reimbursement it actually receives.

Otherwise, management may assume that a lower payment is simply a payer problem when the underlying reason is a payment-methodology issue.

What Should a Home Health Agency Audit When Payments Fall?

When PDGM reimbursement starts falling, agencies should avoid reviewing claims one at a time without looking for patterns.

A better approach is to compare several periods and identify where the variance begins.

A useful review can include:

Compare Expected vs. Actual Payment

Look at the expected reimbursement against the final Medicare payment and identify the dollar variance.

Review PDGM Grouping

Determine whether the patient was assigned to the expected clinical group, functional level, and comorbidity category.

Check LUPA Frequency

Look for an increase in LUPA periods by clinician, branch, referral source, or patient population.

Review Coding and Documentation

Check whether the diagnosis coding and supporting documentation accurately reflect the patient's condition.

Analyze Denials and Adjustments

Review remittance information to determine whether payments were reduced because of denials, adjustments, missing information, or other claim issues.

Look for Branch-Level Patterns

For agencies with multiple locations, compare reimbursement trends between branches to identify unusual differences.

Where Home Health Billing Support Can Help

PDGM reimbursement problems can become difficult to manage when clinical, coding, billing, and payment information sits in different systems or is reviewed by different teams.

A specialized home health billing services team can help agencies review claims, identify payment variances, monitor A/R, analyze denials, and determine whether reimbursement problems are related to coding, documentation, LUPA, payer processing, or other billing issues.

The value is not simply in submitting claims.

The bigger goal is understanding why expected revenue is not turning into collected revenue.

A PDGM Payment Drop Should Trigger an Investigation

A lower PDGM payment does not automatically mean the payer made a mistake.

It may be related to a change in case-mix assignment, LUPA, coding, documentation, timing, wage adjustment, outlier methodology, or the broader Medicare payment rules.

For 2026, CMS has made several changes to the home health payment system, including recalibrated case-mix weights and updated LUPA thresholds.

That makes it even more important for home health agencies to understand the reason behind payment changes rather than simply tracking the total reimbursement number.

A good PDGM revenue review should answer three questions:

What did we expect to be paid?

What were we actually paid?

What caused the difference?

Once those questions are answered consistently, an agency can determine whether the problem is related to clinical documentation, coding, billing operations, payer processing, or the PDGM payment methodology itself.

Final Thoughts

PDGM reimbursement is influenced by more than the number of visits provided.

Case-mix assignment, clinical grouping, comorbidities, functional impairment, LUPA, timing, wage adjustments, documentation, and 2026 payment changes can all affect what a home health agency ultimately receives.

If payments are consistently falling below expectations, the answer is not necessarily to submit more claims or simply follow up with the payer more often.

The first step is to understand where the payment variance is coming from.

Once the agency identifies the cause, it can address the specific problem instead of treating every reimbursement reduction as a general billing issue.

Frequently Asked Questions

Why did my home health PDGM payment decrease?

A PDGM payment can decrease because of changes in case-mix assignment, coding, clinical grouping, comorbidity adjustment, functional impairment, LUPA, timing, wage adjustments, or other payment factors.

Does LUPA reduce home health reimbursement?

Yes. When a 30-day period does not meet the applicable visit threshold, CMS uses per-visit payment rather than the full 30-day period payment.

Did Medicare change PDGM payments in 2026?

Yes. CMS finalized several CY 2026 home health payment changes, including recalibrated case-mix weights, updated LUPA thresholds, and permanent and temporary payment adjustments.

Can coding affect PDGM reimbursement?

Yes. Diagnosis coding and other patient information are used in PDGM classification. Incorrect or unsupported coding can therefore affect the resulting payment category.

What should a home health agency do when reimbursement keeps falling?

The agency should compare expected and actual payment, review PDGM grouping, check LUPA patterns, examine coding and documentation, review remittance adjustments, and look for recurring patterns across patients, payers, clinicians, and branches.