PDPM Diagnosis and SLP Coding: When the Assessment Outruns the Clinical Record

SNF PDPM diagnosis upcoding means knowingly using unsupported diagnoses or assessment entries to obtain a higher Medicare payment. The diagnosis reaches the Minimum Data Set, the assessment produces a payment classification, and the facility bills from that classification. Taxpayers fund the higher payment for a condition the resident’s records do not support. If you are asked to add aphasia, change a swallowing assessment or replace the primary diagnosis, the clinical record should explain why. When the instruction comes from a reimbursement target instead, the person who saw the original assessment may know exactly where the story changed.

How a Primary Diagnosis Reaches the Claim

The primary diagnosis identifies the main reason for the resident’s Medicare Part A skilled nursing facility stay. Its ICD-10 code goes in MDS item I0020B and maps to a clinical category used in payment classification.

The Patient Driven Payment Model replaced the RUG-IV system for covered Part A stays on October 1, 2019. Patient characteristics and clinical needs took the place of therapy-minute groups. PDPM classifies residents separately for physical therapy, occupational therapy, speech-language pathology, nursing and nontherapy ancillary services, then adds a component for costs outside those resident-specific groups.

That change moved the financial incentive. The California Research Bureau’s 1997 report on health care payment, Fraud and Abuse in the Health Care Market of California, contrasted the incentive to provide more services under fee-for-service payment with the incentive to curtail care under capitation. Under PDPM, the assessment of the resident’s condition carries the classification that therapy minutes once supplied.

The diagnosis has to describe the reason for skilled nursing facility care. The October 2025 CMS assessment manual points to physician progress notes, transfer documents, discharge summaries and the history and physical. It also explains that a resident often enters the facility for an aftereffect of a disease or injury. The hospital’s original acute diagnosis and the condition driving the skilled nursing facility stay can describe different stages of care.

The applicable mapping matters too. CMS publishes year-specific diagnosis mappings. A code marked Return to Provider cannot serve as the primary reason for the stay. For some diagnoses, a qualifying operation during the preceding hospital admission can change the default clinical category. The diagnosis, procedure history and mapping version all belong beside the assessment being examined.

Secondary diagnoses also affect nontherapy ancillary payment. The NTA component assigns points to specified conditions and services, then uses the total to place the resident in a payment group. An unsupported diagnosis can raise that score and move the resident into a higher-paying group.

The MDS then produces the HIPPS classification used on the bill. A diagnosis change reaches the money through that chain: the changed assessment, the affected component, the HIPPS code and the paid claim. The clinical record explains whether the resident belonged in the group that Medicare paid for.

What SLP Coding Adds to the Payment

Speech-language pathology classification combines the acute neurologic category, SLP-related comorbidities and cognitive impairment with separate swallowing and diet inputs. Aphasia is one of the listed comorbidities. Others include stroke, traumatic brain injury and certain speech, language and swallowing conditions.

The classification considers whether the resident has any SLP-related comorbidity, alongside the neurologic and cognitive indicators. It then considers whether the resident has a swallowing disorder, a mechanically altered diet, both or neither. Those combinations determine the SLP group. The assessment can therefore change speech-language payment through several different entries.

SLP Comorbidities Added to MDS Without Supporting Physician Records

SLP comorbidities added to MDS without supporting physician records raise a specific question: who documented the diagnosis, and what made it active for this assessment?

For Section I diagnoses such as aphasia, the October 2025 manual requires a diagnosis documented within the preceding 60 days by a physician or an eligible practitioner permitted under state law. Active status depends on its relationship to the resident’s function, cognition, mood or behavior, treatment, nursing monitoring or risk of death during the seven-day look-back period.

A physician-confirmed problem list can identify the diagnosis. Progress notes, care plans, orders and nursing assessments establish its current effect. Copying a condition forward leaves that second question unanswered. An MDS coordinator who sees a new comorbidity should be able to connect it to both the diagnosing practitioner and the resident’s condition during the relevant period.

Swallowing Assessments and Mechanically Altered Diet Payment

An altered swallowing assessment in a nursing home can change SLP payment, as can a mechanically altered diet entry. The records behind those entries describe different things: symptoms the resident experienced and the food or liquids the resident actually received.

In the October 2025 manual, K0100 captures swallowing signs such as coughing or choking, food remaining in the mouth, and complaints of difficulty or pain with swallowing. The assessment draws on mealtime observation and nursing, physician, dietary and speech-language notes. K0520C3 captures a mechanically altered diet while a resident, including changes in texture such as pureed food or thickened liquids.

The distinction matters when a modified diet successfully controls the symptoms. CMS directs assessors to code the swallowing item from symptoms during its look-back period, while the altered diet has its own entry. The SLP calculation expressly distinguishes either condition from both. A diet order, a swallowing evaluation and the meal record let us examine each entry on its own terms.

PDPM Aphasia Diagnosis With No Current Speech Therapy

In the HHS Office of Inspector General audit of Pinnacle Multicare Nursing and Rehabilitation Center, the aphasia dispute turned on whether the diagnosis was active. Current speech therapy was one possible indication of active status, rather than a universal requirement for coding aphasia.

In its November 2025 audit, the inspector general described a resident whose screening note listed aphasia but said no speech therapy intervention was indicated. The inspector general found that the documentation failed to show the diagnosis affecting the resident’s function, treatment or nursing monitoring.

Pinnacle disputed the audit findings and recommendations, including that conclusion. It argued that a documented diagnosis and its continuing relevance to the resident’s condition could support classification even without active therapy. The inspector general’s response accepted that the resident had an aphasia diagnosis, but maintained that the clinical record did not support its active status. The diagnosis on the chart needed a documented effect during the assessment period.

The inspector general calculated an $18,010 reduction for the claim, also correcting three other payment components.

What Evidence Is Needed to Prove Fraud?

The evidence needs to connect the unsupported clinical entry to the assessment, the payment and the people who knew or directed what went into the claim. A therapist’s observation, a physician’s diagnosis and a billing record each answer a different part of that question.

If an SNF primary diagnosis was changed to increase the PDPM clinical category, we examine the original and changed assessments alongside the clinical reason offered for the change. We look for the clinical explanation in the diagnosis, hospital record or physician order. An instruction to reach a reimbursement target supplies evidence about the decision. The resulting HIPPS code and paid claim show what the change accomplished.

The assessment draws on a healthcare team. A registered nurse conducts or coordinates the assessment, and contributors certify the accuracy of their portions. Physicians and eligible practitioners supply diagnoses and orders. Nursing staff and therapists document the resident’s condition and care. The completed assessment depends on those contributions, which is why the underlying notes matter alongside the final form.

The original entry, its revision, the person making the change and the instruction behind it can connect an otherwise unexplained code to a deliberate choice. Billing software carries that choice forward. We compare its output with the clinical observations that were available when the assessment was completed.

The assessment event and the payment dates show which claims a diagnosis change affected. We trace that connection to build the whistleblower case. A whistleblower case under the False Claims Act can pay 15% to 30% of what the government recovers.

What the Swallowing Complaints Describe

A complaint against Strauss Ventures, doing business as The Grand Healthcare System, alleged a direct instruction to change a patient’s swallowing status. The therapist said the patient was already drinking thin liquids without difficulty. Management allegedly wanted therapy to work toward an ability the patient already had:

The complaint dates that episode to April 2018, before PDPM began. Management allegedly wanted a record that contradicted what the therapist observed.

Family observations supplied a different comparison in a complaint against Myocare Nursing Home and Westpark Healthcare. The family alleged that Westpark’s records described a resident as mute even though he regularly spoke with his daughters in English and Italian. They also alleged that records claimed he could not swallow while family members watched him eat sandwiches and other food.

The family tied those allegations to billing records for speech therapy in 2017 and swallowing tests in 2018 that they said were nonexistent or unnecessary. For a PDPM claim, we connect that kind of contradiction to the swallowing or diet entry, the SLP group and the payment.

What the Pinnacle Audit Shows About PDPM Coding

The inspector general found unsupported HIPPS codes in 95 of 100 sampled Pinnacle claims for services in 2020 and 2021. The SLP group was unsupported in 63 claims, with errors overlapping across payment components.

The primary diagnosis also mattered. In one example, the inspector general said the clinical documentation supported major depressive disorder as the reason for skilled services rather than the osteoarthritis diagnosis used for the PT and OT classification. The inspector general calculated that the supported classification would have reduced reimbursement by $216. The comparison was between the documented reason for care and the category the facility billed.

Across its broader review of coding, skilled need and documentation, the inspector general recommended an extrapolated refund of $31,227,884. The resident-level comparisons trace what the record showed, what the MDS said and how the difference affected payment.

CMS has also addressed the issue at the payment-policy level. Its July 2026 fact sheet on the fiscal year 2027 final rule says a request for information focused on potential PDPM updates and observed case-mix upcoding. CMS said it would consider the comments in future rulemaking. The practical question inside a facility remains concrete: what clinical information supports the classification it submitted?

When You Know Why the Assessment Changed

If you are the MDS coordinator or therapist who saw a diagnosis added or a swallowing record changed to reach a payment target, speak with our whistleblower experts about the assessment and the instruction behind it. We work with you to connect the clinical contradiction to the Medicare claim and build your strongest skilled nursing facility whistleblower case. We bring in Medicare fraud whistleblower lawyers who understand assessment coding and stay beside you throughout the case.