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Patient-Drive Payment Model (PDPM) In a Nutshell

  • PDPM or Patient-Driven Payment Model is the new system, replacing the RUG-IV, for calculating reimbursement by Medicare in the skilled nursing setting. 
  • This PDPM model aims to utilize the individual patient’s characteristics and needs based on diagnosis as opposed to the RUG-IV system relying on volume of services. 
  • Let’s breakdown the PDPM model to better understand how reimbursement is determined. 

Maria Theresa D. Dimacali

BST, LVN, RAC-CT, ICP, PA-WCC

July 28, 2022
Simmons University

Skilled Nursing vs Long-Term Care

The long-term care facilities have emerged not only as a permanent home for the elderly during their retirement or post-retirement years but as respite and recuperative facilities even for the younger patients.  

It is for this type of services they offer which also categorize them as skilled nursing and rehabilitation facilities becoming a step-down facility from an acute hospital stay.  

To further understand the difference between long-term care facilities and skilled nursing/rehabilitation facilities, we will focus on the services they offer. 

A long-term care facility provides custodial care requiring supervised, minimal or total dependence in the performance of the activities of daily living (ADLs) such has bed mobility, transfers in and out of bed, walking in the room, walking in the corridor, locomotion on unit peripheral to the patient’s room, locomotion off unit which involves areas farther from the patient’s room such as dining areas, rehabilitation rooms, activity rooms and other administrative offices, toileting, eating, personal hygiene and bathing.  

Custodial care does not require the assistance of a licensed staff. They are assisted by certified nursing assistants (CNAs) and licensed staff assist them during medication administration ordered by the patient’s attending physician in the facility. Other ancillary services include room and board, activity planning, housekeeping, laundry, and maintenance of fixtures/equipment.  

Reimbursement for these services is covered under the State of California’s Medi-Cal program or privately paid by the patient if he/she does not qualify under the Medi-Cal program. 

Skilled Nursing Requirements

Skilled nursing services are covered under the Federal Government’s Medicare program for a limited time or on a short-time basis and must meet the following requirements: 

  1. Patient has Medicare Part A hospital insurance and have eligible days left to use during the benefit period 
  2. Patient has at least three qualifying inpatient days in an acute hospital. Observation services are not covered as part of the inpatient stay. 
  3. Admitted in the Skilled nursing facility (SNF) within a short time (generally 30 days) of leaving the hospital and require skilled services related to hospital stay. 
  4. At the direction of the attending physician, a patient needs skilled care from and/or under the supervision of a skilled nursing or therapy staff daily. 
  5. The skilled services are provided by a Medicare-certified SNF. 
  6. These skilled services are for a medical condition that is a hospital-related medical condition treated during the three-day qualifying inpatient hospital stay (not including the day of discharge from the hospital). It may also include a condition that started while the patient was getting care in the SNF for a hospital-related medical condition such as antibiotic medications via intravenous (IV) route to treat infections even if it was not the reason the patient was admitted to the acute hospital. 

PDPM overview

The Clinician as Financial Analyst

The role of the Minimum Data Set (MDS) nurses has evolved all these years from being a clinician to a financial analytical nurse because the MDS assessments have become the basis for facility reimbursement by the Medicare program. 

With the transition from Resource Utilization Group Version IV (RUG-IV) to the Patient-Driven Payment Model (PDPM) on October 1, 2019, the MDS nurse requires an analytical mind and financial knowledge to determine the highest allowable reimbursement for the facility. 

RUG-IV vs Patient-Driven Payment Model (PDPM)

Prior to October 1, 2019, all SNFs which participate under the Medicare program are paid under the Skilled Nursing Facility (SNF) Prospective Payment System (PPS) based primarily on the type and intensity of therapy services provided to the patients regardless of their acuity, unique characteristics, specific needs, or goals. The RUG-IV consists of two case-mix adjusted components: Therapy which is based on volume of services provided and nursing.  

Classifications from the RUG-IV assign patients to payment classification groups, called RUGs, within the payment components: Rehabilitation Plus Extensive Services, Rehabilitation, Extensive Services, Special Care High, Special Care Low, Clinically Complex, Behavioral Symptoms and Cognitive Performance Problems and Reduced Physical Function. 

The Patient-Driven Payment Model focuses on the patient’s unique characteristics and needs based on diagnosis which arise during inpatient hospital stay. The calculation of payments is based on the five case-mix adjusted components: Physical Therapy (PT), Occupational Therapy (OT), Speech Language Pathology (SLP), Nursing and Non-therapy ancillary (NTA). 

PDPM payment

RUG-IV vs PDPM Overview

RUG-IVPDPM

Patient classification system where patients are grouped according to their care and resource needs. 

Focuses on clinically relevant factors rather than volume-based services or RUG levels. 

Determinant for payment is based on the number of therapy minutes provided regardless of resident’s acuity, diagnosis and other skilled nursing services provided. 

Determinants of payment are based on the patient’s characteristics assigned to six components: 

 

  • Physical Therapy 
  • Occupational Therapy 
  • Speech Language Pathology 
  • Nursing 
  • Non-Therapy Ancillary 
  • Fixed non-case mix rate 

Patients are assigned to classification groups known as RUG Classification Groups based on various characteristics of patients and the intensity of therapy services provided. 

Patients are assigned a clinical category based on the primary diagnosis for SNF stay. The International Code for Diseases, Tenth Revision, Clinical Modification Codes which popularly known as the ICD-10 CM which is coded on Section I0020B of the MDS assessment is mapped to a clinical category which will be part of the determinant of payment for the PDPM components. 

  

The PDPM Clinical Categories are discussed below. 

RUG Classification Groups based on the volume and intensity of therapy provided to patient: 

  • Rehabilitation Plus Extensive Services 
  • Rehabilitation 
  • Extensive Services 
  • Special Care High 
  • Special Care Low 
  • Clinically Complex 
  • Behavioral Symptoms and Cognitive Performance Problems 
  • Reduced Physical Function 

Determinants of Payment for PDPM are summarized below. 

 

The PDPM Rate is derived from the sum of all the PDPM component rates: 

 

PT base rate x PT case mix index (CMI) x VPD adjustment factor 

      Plus 

OT base rate x OT CMI x VPD adjustment factor 

     Plus 

SLP base rate x SLP CMI 

     Plus 

NTA base rate x NTA CMI x VPD adjustment factor 

     Plus 

Nursing base rate x Nursing CMI x 18% Nursing adjustment factor (only for AIDS patients) 

    Plus 

Non-case- mix base rate 

PDPM Components

When RUG classification was used as the basis of reimbursement, all patients with different patient characteristics were classified in the same RUG level based on the volume and intensity of therapy services provided.

With PDPM payment method, the determinants of payment are categorized into the following case-mix adjusted components: 

  • Physical Therapy (PT) 
  • Occupational Therapy (OT) 
  • Speech Language Pathology (SLP) 
  • Nursing Classification 
  • Non-therapy Ancillary (NTA) 
  • Fixed non-case mix rate 

The PDPM rate is adjusted over the course of facility stay by the inclusion of a variable per diem (VPD) adjustment on the following three components: PT, OT and NTA.  

18% of the Nursing adjustment factor is multiplied to the Nursing rate only patients with diagnosis of AIDS. Each component has its case mix index to determine the component rate.  

PDPM system

PDPM Clinical Categories

The Centers for Medicare and Medicaid Services (CMS) have provided the SNFs with a list of ICD-10-CM codes mapping to one of the clinical categories: 

  • Major joint Replacement/Spinal Surgery 
  • Orthopedic Surgery (Except Major Joint Replacement or Spinal Surgery 
  • Non-orthopedic Surgery and Acute Neurologic 
  • Other Orthopedic (non-surgical orthopedics and musculoskeletal) 
  • Medical Management (medical management, acute infections, cancer, pulmonary, cardiovascular/coagulation, acute neurologic) 
  • Acute infections 
  • Cardiovascular and Coagulations 
  • Cancer 
  • Pulmonary 
  • Acute neurologic 

These clinical categories are used as the Primary PDPM diagnosis giving weight to the calculation of PDPM rates for PT, OT, SLP and Nursing components. Other diagnoses will affect the Non-therapy Ancillary (NTA) component. 

Functional Score

The patient’s functional score which is coded on Section GG of the MDS form is derived by assessing the patient’s usual self-performance in the ADL task areas during the first three days of facility stay.  

The functional scoring is based on resident’s performance in eating, oral hygiene, toileting hygiene, sit to lying, lying to sitting on side of bed, sit to stand, chair/bed-to-chair transfer, and toilet transfer assessed on the first three days of admission to the facility with the admission day counted as day 1. Functional scoring is one of the factors used to calculate the PDPM rate for the PT, OT and Nursing components. 

PDPM reimbursement

Determinants of Payment on MDS Assessment

Below is a summary of the determinants of payment and which section on the MDS assessment form they are derived from. 

Physical TherapyOccupational TherapySpeech TherapyNursingNon-therapy Ancillary

Primary reason for SNF care or PDPM diagnosis coded on Section I00200B (ICD-10 code) of the MDS assessment 

      and 

Functional status coded on Section GG of the MDS assessment 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Variable per diem adjustment rate 

Primary reason for SNF care or PDPM diagnosis coded on Section I00200B (ICD-10 code) of the MDS assessment 

      and 

Functional status coded on Section GG of the MDS assessment 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Variable per diem adjustment rate 

Primary reason for SNF care or PDPM diagnosis coded on Section I00200B (ICD-10 code) of the MDS assessment 

    and 

Cognitive Status: BIMS score coded on the Section C of the MDS assessment 

    and 

presence of a swallowing disorder or mechanically altered diet coded on Section K of the MDS assessment 

     and 

other SLP-related comorbidities coded on Section I of the MDS assessment 

Clinical information from SNF stay 

     and 

Functional status coded on Section GG of the MDS assessment 

     and 

Extensive services received coded on Section of the MDS assessment such as Tracheostomy, Ventilator, and Isolation 

     and 

Presence of Depression coded on Section D: PHQ9 on the MDS assessment 

     and 

Restorative nursing services coded on Section O of the MDS assessment 

Comorbidities present coded on  Section I of the MDS assessment 

     and 

Extensive services received coded on Section O of the MDS assessment: Tracheostomy, Ventilator and Isolation 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Variable per diem adjustment rate 

The Calculations

The choice of PDPM diagnosis has become rocket science for MDS nurses as this gives more weight in the calculation of the PDPM rate for the facility. Each patient has a different reimbursement rate as compared to the RUG-IV PPS rate in the past. It is highly recommended for the MDS nurse to make calculations which can determine the highest acceptable reimbursement rate for the facility.  

The MDS software programs such as PointClick Care, Matrix, Net Solutions, to name just a few, automatically calculate the PDPM rates once the MDS assessment is completed. It is highly advisable for MDS nurses to review each assessment to ensure that all skilled services are captured during the assessment period to maximize reimbursement rate for the facility based on the patient’s diagnosis and acuity. 

For the Non-Therapy Ancillary Component, each diagnosis has a corresponding score which is multiplied to the federal NTA case mix index. The higher the score, the higher the NTA rate. 

All PDPM components are assigned an appropriate score to multiply to the federally assigned case mix index group. After the PDPM rate for each component is determined, the sum of the PDPM component rates is added to the fixed non-case mix rate which will be the final reimbursement rate for the patient for the entire skilled nursing facility stay.  

This can be revised if there is a change in a patient’s condition which requires additional skilled services such as IV medications which were not administered initially.

For situations like this, the MDS nurse will choose to complete an Interim Payment Assessment (IPA) to capture such changes and eventually increase the daily reimbursement rate. The MDS nurse should be alert to these changes to ensure timely completion of the required MDS assessment.

PDPM medicare

PDPM Considerations for an MDS Nurse

To assist in ensuring that you can capture all diagnoses and pertinent information to maximize facility reimbursement, I suggest doing the following (which most MDS nurses I am sure are already doing): 

Inquiry Before Admission

Request for Hospital History & Physical, Progress Notes, and consults. 

Request for labs, imaging studies and surgical reports whichever is applicable. 

Upon Admission

Formulate a PDPM group to review the chart and come up with the resident’s primary or principal diagnosis and do the ICD-10 clinical category mapping. Medical records department should already code and map for the clinical category to be able to determine principal diagnosis code and calculate expected daily rate for the facility using either the manual PDPM worksheet or software-generated calculation. 

Section GG Rehab and Nursing Functional Score

Rehab and Nursing staff should complete the Section GG on the MDS form for indicated ADL tasks on Day 1-3 of admission with the admission date as Day 1. 

Re-calculate expected daily rate based on the completed Rehab and Nursing Functional Scores and re-review principal diagnosis. 

 

ENSURE TO CAPTURE EVERYTHING PRIOR TO COMPLETION OF THE 5-DAY MDS ASSESSMENT!

Interdisciplinary Team Members Documentation

(Nursing, Social Services, Dietary and Activity Staff) 

All disciplines should complete all their assessments ON TIME to CAPTURE all skilled services and accurately calculate resident’s daily rate PRIOR TO completion and transmission of the MDS 5-day assessment. 

Nursing

Daily Medicare charting should focus on all possible nursing clinical categories, special care high, special care low, clinically complex, behavioral symptoms and cognitive performance, and reduced physical function. 

Social Services

Conduct interview assessments for the Brief Interview for Mental Status (BIMS), and Mood ON ASSESSMENT REFERENCE DATE (ARD) OR A DAY PRIOR TO ARD.

Dietary Services

Complete Section K ON ARD or a DAY PRIOR TO ARD indicating if resident has a swallowing disorder especially if on a mechanically altered diet (Puree or mechanical soft diet). Coding of these areas will affect the Speech Case Mix Index. 

Training

Continuous training is the key and implementation of what was learned in coordination with the facility team members will ensure success in providing skilled care for the patients and maximizing facility reimbursement. 

Updates

Always be on the lookout for new updates which usually happen every year and usually effective by October 1 of each updated year. This gives you enough time to prepare for their implementation of any changes as MDS assessments are time sensitive. 

Networking

Seek advice from experts, trainers and other MDS nurses when needed to clarify any areas in the MDS assessment or PDPM calculation. You are never alone in this field and resources are available in seminars, webinars, the CMS website, MDS manual, etc.  

Paitence and Preserverence

The saying, “haste makes waste” applies in the completion of MDS assessments and calculation of the maximized PDPM rate for the patient. At first, it took me longer to get used to making calculations in determining the highest allowable rate for the patient.

I believe that this payment method acknowledges not only the skilled rehabilitation services provided to the patient, but also the complexity of skilled nursing services rendered to the patient and appropriately incorporated in the PDPM rate calculation.  

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