Skilled Nursing Facility Billing Services That Maximize Every PDPM Component Across Every Part A Stay
SNF billing is the most MDS-dependent revenue environment in post-acute care. Under PDPM, a single incorrect ICD-10 diagnosis on the MDS simultaneously reduces the PT, OT, and SLP per diem components for the entire stay. A late assessment generates default payment rates that no amount of clinical complexity can recover. MBC skilled nursing facility billing services, your trusted SNF medical billing company, manage MDS-to-claim accuracy, Medicare Part A and Part B billing, therapy billing for SNF, and long-term care billing services so your facility captures every dollar its resident census earns.
Performance data from MBC-managed skilled nursing facilities and long-term care billing programs nationwide
SNF Billing Losses That Compound Silently Across Every Resident Day
SNF billing losses are not claim denials. They are per diem underpayments that are accepted by CMS at the wrong rate and never generate a rejection. A miscoded MDS diagnosis reduces the per diem by a fixed amount every single day of the stay. Multiplied across 30 residents and 90-day stays, the annual revenue impact of systematic MDS coding errors exceeds the total billing fees for most SNF billing companies.
Current Regulatory Updates Affecting SNF Billing
Three Policy Changes Directly Impacting Skilled Nursing Facility Billing Services Revenue
CMS PDPM Parity Adjustments and FY2026 SNF Prospective Payment Rate Changes
CMS implemented a PDPM parity adjustment to address payment changes observed following the transition from RUG-IV. FY2026 SNF Prospective Payment System updates adjusted base rates and case-mix weights across PDPM components. SNFs that have not reconciled their expected per diem rates against FY2026 published rates are either collecting below the updated allowable rate or identifying potential overpayments. PDPM billing services must incorporate annual rate updates into per diem projection models to maintain revenue integrity across the Part A census.
Medicare Advantage SNF Prior Authorization Requirements and Coverage Policy Expansion
Medicare Advantage plans have significantly expanded prior authorization requirements for SNF admissions and continued stay reviews. Many MA plans now require authorization at admission and again at defined intervals during the stay, often at days 14, 30, and 60. Facilities without systematic MA authorization tracking and continued stay review workflows face mid-stay coverage terminations that generate uncollectible resident days. Post-acute care billing services for MA populations require dedicated authorization management separate from traditional Medicare Part A billing workflows.
RAI Manual Updates and MDS 3.0 Assessment Requirements for PDPM Accuracy
CMS periodically updates the Resident Assessment Instrument (RAI) Manual governing MDS completion requirements. Recent updates have affected item coding guidance for several PDPM-relevant sections including Section GG functional scores, Section I active diagnoses, and Section O special treatments. SNFs that have not updated their MDS completion training to reflect current RAI Manual guidance are coding MDS items under outdated rules, generating PDPM payment inaccuracies that affect every Part A resident's per diem rate across the facility census.
SNF-Specific Billing Challenges
Why Generic Nursing Facility Billing Services Fail High-Census SNF Operations
SNF billing losses are invisible. No denial. No rejection. Just a per diem paid at the wrong rate, every day, for every resident, until someone with PDPM expertise audits the MDS and finds the gap.
PDPM Per Diem Underpayment from MDS Diagnosis Miscoding
Under PDPM, the primary diagnosis coded on the MDS Section I determines the clinical category that drives the PT, OT, and SLP per diem components. When the primary diagnosis is coded to a lower-paying clinical category than the resident's actual condition warrants, all three therapy components are reduced for the entire stay. A resident admitted post-hip fracture coded to a medical management category instead of the surgical hip fracture category loses the higher-paying surgical category rate every day of the stay, and the claim is accepted and paid at the incorrect lower rate with no denial to trigger a review.
Late MDS Assessments Triggering Default Payment Periods
PDPM requires a 5-day assessment with an Assessment Reference Date within days 1-8 of the Part A stay. If the ARD is set outside the required window or the assessment is completed late, CMS assigns default payment rates for the affected payment period rather than the case-mix adjusted rates the resident's clinical complexity would otherwise generate. For a high-acuity resident, the difference between the default rate and the correctly case-mix adjusted rate can exceed $200 per day. A single late 5-day assessment on a 90-day stay generates thousands of dollars in permanent, unrecoverable per diem losses.
Part B Services Billed During Part A Stays Generating Compliance Exposure
Medicare Part A SNF consolidated billing bundles most services into the per diem. Separately billing Part B for services that are included in the Part A consolidated billing is a systematic compliance violation. The most common errors are billing physician E/M visits to Part B during a Part A stay using the wrong payer, billing therapy services to Part B for residents currently in a qualifying Part A stay, and billing laboratory services to Part B that are covered under the Part A per diem. Each generates an overpayment liability when identified in a Medicare audit.
Medicare Advantage Authorization Failures and Mid-Stay Coverage Terminations
Medicare Advantage SNF admissions require prior authorization that many facilities obtain at admission but fail to renew at required continued stay review intervals. When a MA plan terminates coverage mid-stay because the facility did not submit a continued stay review request with updated clinical documentation, the facility has already provided and documented care for the denied resident days. Retroactive denials on high-acuity MA residents represent some of the largest single-claim revenue losses in SNF billing, and they are entirely preventable with systematic continued stay tracking.
Section GG Functional Score Undercoding Reducing Nursing Component
The PDPM nursing component is driven in part by Section GG functional scores on the MDS, which measure the resident's functional independence in self-care and mobility activities. When Section GG scores are coded conservatively, reflecting better function than the clinical record supports, the nursing component per diem is reduced. SNF nursing staff who default to middle-range GG scores rather than accurately scoring the resident's actual functional status are systematically undercoding the nursing component across the facility census, generating per diem losses that never appear as denials.
Non-Therapy Ancillary Component Undercoding from Incomplete Comorbidity Capture
The PDPM Non-Therapy Ancillary (NTA) component is driven by a comorbidity point score based on active diagnoses coded on the MDS. High-cost conditions including HIV, respirator dependence, active infections, parenteral nutrition, and multiple IV medications each add NTA points that increase the per diem. When MDS coders do not capture all qualifying active diagnoses from the clinical record, the NTA score is understated and the NTA per diem is reduced for the entire stay. NTA undercoding is the most consistently missed PDPM revenue opportunity in SNF billing.
Enterprise SNF RCM
Skilled Nursing Facility Billing Services Engineered for PDPM Accuracy and Full Census Revenue Capture
SNF billing is not a claim submission problem. It is a daily per diem accuracy problem that compounds across every resident and every day until someone reconciles the MDS to the clinical record. Learn more about our revenue cycle management services.
PDPM Component Optimization Through MDS Clinical Accuracy
Every admission MDS reviewed against the clinical record before the ARD is locked. Primary diagnosis mapped to the correct PDPM clinical category based on documented primary reason for the SNF stay. Section GG functional scores verified against nursing documentation of actual functional status. Active comorbidities reviewed for NTA point capture. SLP indicators for swallowing disorders, cognitive impairment, and restorative dining confirmed from clinical records before coding. PDPM per diem projected per resident to identify component gaps before the assessment is transmitted.
MDS Assessment Calendar Management and On-Time ARD Compliance
Assessment Reference Date tracking for every Part A resident with alerts triggered before each required assessment window. 5-day, 30-day, 60-day, and 90-day assessments scheduled and completed within required ARD windows. Significant change in condition assessments identified and triggered from clinical change indicators. No Part A stay generates default payment rates because an assessment was completed late. On-time MDS compliance is monitored at the facility level and reported weekly.
Part A and Part B Billing Separation and Compliance Management
Systematic tracking of each resident's Part A status throughout the stay. Part B services billed only for non-Part A residents or for services explicitly excluded from Part A consolidated billing. Physician and NP/PA Part B visit claims routed through the correct billing pathway per resident status. Part B therapy claims for non-Part A residents billed with correct CPT codes, therapy type modifiers, and functional limitation reporting. No Part B claims submitted for services bundled into the Part A per diem.
Medicare Advantage Authorization and Continued Stay Review Management
Pre-admission authorization obtained for every Medicare Advantage SNF admission with clinical documentation matched to MA plan criteria. Continued stay review calendar maintained per resident with submission deadlines tracked against each MA plan's review interval requirements. Updated clinical documentation assembled and submitted before each review deadline. Mid-stay coverage terminations prevented by proactive continued stay management. MA denial rate monitored per plan and reported monthly.
Therapy Billing for SNF Under Medicare Part B
Part B therapy billing for non-Part A residents using correct CPT codes by therapy type: PT (97110, 97530, 97535, 97150), OT, SLP. Therapy type modifiers (GP, GO, GN) applied correctly per discipline. Functional limitation reporting (G-codes) maintained per Medicare requirements. Therapy minutes and clinical justification documented to support medical necessity. KX and CO modifiers applied correctly at therapy cap threshold. No Part B therapy claim submitted without complete documentation of the therapy type, minutes, and clinical justification.
Long-Term Care and Medicaid Billing Accuracy
Medicaid per diem billing with state-specific acuity assessment compliance, coinsurance coordination for dual-eligible residents during Medicare Part A days 21-100, and Medicare Supplement secondary billing for qualifying days. Long-term care billing services maintained for private pay, Medicaid pending, and managed care Medicaid residents under separate billing workflows. Medicaid redetermination tracking to prevent billing gaps when Medicaid eligibility lapses. Every resident payer status verified before claims are submitted.
SNF Billing Code Reference
Mastering Every Billing Code for Skilled Nursing Facility Billing Services
SNF billing codes span PDPM per diem revenue codes, Medicare Part B physician and therapy codes, MDS-driven assessment codes, and long-term care billing categories. Our specialists apply every code correctly across every payer and every resident type.
PDPM Billing Services Medicare Part A: Per Diem Revenue Codes, UB-04 Billing, and Five-Component Case-Mix
| Billing Element | Description | SNF Billing Note |
|---|---|---|
| PDPM Components | Five Case-Mix Components: PT, OT, SLP, Nursing, and Non-Therapy Ancillary Per Diem Rates | Each component has its own case-mix group and per diem rate determined by MDS data. An error in any single MDS item can reduce one or more components for the entire stay. Reconcile each component against the clinical record before the 5-day MDS is transmitted. |
| Revenue Code 0180 | UB-04 SNF Revenue Codes for Part A Consolidated Billing by Service Category | Part A claims use the UB-04 with revenue codes by service type. Room and board, therapy, nursing, and ancillary services are billed under consolidated Part A. Do not separately bill Part B for any service included in the Part A per diem consolidation. |
| Variable Per Diem | PDPM Variable Per Diem Adjustment: Days 1-3 at 100%, Days 4-100 at Adjusted Rates by Component | PT and OT components use variable per diem rates that decrease after day 3. NTA component uses a higher rate for days 1-3 to account for early high-cost services. Verify the correct rate period is applied to each billing day in the stay. |
SNF Billing Medicare Part B: Physician Visits (99307-99310), Therapy CPT Codes, and Part B Drug Billing
| CPT / Code | Description | SNF Billing Note |
|---|---|---|
| 99307-99310 | SNF Subsequent Nursing Facility Care E/M Codes by MDM Complexity: Low (99307) through High (99310) | Bill to Medicare Part B for physician, NP, and PA visits to non-Part A residents. Do not bill 99307-99310 to Part B for residents currently in a qualifying Part A stay; those visits bill under Part A consolidated billing. Select level based on documented MDM complexity. |
| Part B Therapy CPT | PT (97110, 97530, 97535), OT, and SLP CPT Codes for Non-Part A Residents Under Medicare Part B | Bill Part B therapy only for residents NOT in a qualifying Medicare Part A stay. Apply therapy type modifiers: GP for PT, GO for OT, GN for SLP. Document minutes, clinical justification, and therapist credentials on every claim. |
| Part B Drugs / Lab | Medicare Part B Drugs and Laboratory Services Not Bundled into Part A Consolidated Billing | Confirm each drug or lab service is excluded from Part A consolidated billing before submitting to Part B. Most routine lab and pharmacy is bundled under Part A. Only specific categories are separately billable to Part B during a Part A stay. |
SNF Billing MDS Documentation and Billing: Assessment Windows, ARD Compliance, and PDPM-Relevant MDS Sections
| MDS Element | Description | SNF Billing Note |
|---|---|---|
| 5-Day Assessment ARD | Required MDS Assessment with ARD Set Within Days 1-8 of Medicare Part A Stay | The 5-day assessment drives the PDPM payment rate for the entire initial payment period. ARD set outside days 1-8 generates default payment rates. Confirm ARD is set within the required window before the assessment is completed. |
| Section I Diagnoses | MDS Active Diagnoses Driving PDPM Clinical Categories and NTA Comorbidity Point Score | Code all active diagnoses with ICD-10 specificity. The primary diagnosis drives PT/OT/SLP components. Secondary comorbidities drive the NTA score. Missing qualifying active diagnoses directly reduces the NTA per diem. |
| Section GG Scores | Functional Independence Scores for Self-Care and Mobility Driving the Nursing Component | Score based on the resident's actual functional performance, not assumed capacity. Conservative scoring understates functional dependence and reduces the nursing component per diem. Document the basis for each score in the clinical record. |
Therapy Billing for SNF: Part B PT (97110-97535), OT, SLP with Therapy Type Modifiers (GP, GO, GN)
| CPT Code | Description | SNF Billing Note |
|---|---|---|
| 97110 / 97530 | Therapeutic Exercise (97110) and Therapeutic Activities (97530): 15-Minute Timed Codes | Bill in 15-minute units based on documented treatment time. Apply modifier GP for PT, GO for OT. Document the specific exercises or activities performed, minutes, and clinical justification. Bill only for non-Part A residents under Medicare Part B. |
| 97535 / 97150 | Self-Care/Home Management Training (97535) and Group Therapeutic Procedures (97150) | 97535 for ADL training and home management skills. 97150 for group therapy; one unit per group session regardless of session length. Apply correct therapy type modifier per discipline on every claim line. |
| 97129 / 97130 | Therapeutic Interventions for Cognitive Function: Initial 15 Min (97129) and Each Additional (97130) | SLP cognitive rehabilitation codes. Apply modifier GN for SLP. Document the specific cognitive domains addressed and functional impact. Prior authorization required by many commercial payers; confirm coverage before initiating cognitive rehab billing. |
SNF Revenue Architecture
Three Revenue Streams Every Skilled Nursing Facility Billing Service Must Manage
SNF billing revenue flows through three distinct streams, each with different billing forms, payer rules, and documentation requirements. A generalist billing company that manages only one stream leaves the others systematically undercaptured.
PDPM Medicare Part A Per Diem Revenue and Case-Mix Optimization
PDPM billing services Medicare Part A represent the largest and most complex revenue stream in SNF billing. Per diem accuracy depends entirely on MDS clinical coding accuracy across five simultaneous case-mix components. Primary diagnosis mapping, Section GG functional score accuracy, NTA comorbidity capture, and on-time assessment completion each affect per diem rates daily across every Part A resident. The cumulative financial impact of per diem accuracy across a 100-bed SNF with an average Medicare census of 30 residents exceeds the total revenue impact of any other billing variable in the facility.
Medicare Part B and Therapy Billing for SNF Non-Part A Residents
SNF Medicare Part B billing and therapy billing for SNF non-Part A residents represent a second distinct revenue stream requiring separate claim forms, payer routing, and documentation standards. Physician and APP evaluation and management visits, Part B therapy for long-term care residents, and Part B-eligible drugs and diagnostics each generate revenue that is entirely separate from the Part A per diem. Part B compliance requires strict resident status verification to prevent Part B billing for services that should be bundled into an active Part A stay.
Long-Term Care Billing Services, Medicaid, and Medicare Advantage Revenue
Long-term care billing services for Medicaid residents, coinsurance coordination for dual-eligible residents, and Medicare Advantage authorization management represent the third SNF revenue stream. LTC medical billing and post-acute care billing services require state-specific Medicaid rate knowledge, coinsurance billing accuracy across Medicare Part A benefit days, and MA continued stay review management. Each payer type operates under distinct billing rules that cannot be managed under a single uniform billing workflow.
Why Choose MBC for Skilled Nursing Facility Billing Services
When You Outsource SNF Billing, You Need Post-Acute Care Specialists, Not Generalists
Every SNF that chooses to outsource skilled nursing facility billing services to MBC gets a team built exclusively for PDPM accuracy, MDS-to-claim reconciliation, and multi-payer post-acute care revenue management.
Dedicated SNF Billing Specialists
Your facility is managed by billing specialists who work exclusively with skilled nursing facility billing services and LTC medical billing. PDPM component optimization, MDS assessment calendar compliance, Part A and Part B separation, therapy billing for SNF, Medicare Advantage authorization, and Medicaid billing applied to every resident, every payer, every day.
SNF Revenue and PDPM Performance Dashboards
Real-time visibility into PDPM per diem by component per resident, MDS assessment calendar compliance, MA authorization status per resident, Part B therapy billing capture rate, Medicaid billing accuracy, and AR aging by payer. Your administrator sees exactly where per diem revenue is being captured and where MDS coding gaps are generating daily underpayments before they compound into quarterly losses.
RCM Principal with SNF Billing Expertise
Your first engagement is with a senior RCM Principal who understands PDPM case-mix economics, MDS clinical category mapping, Medicare Part A and Part B billing separation, therapy billing for SNF compliance, and Medicare Advantage SNF authorization requirements. Not someone reading from a generic post-acute care billing script.
HIPAA-Compliant EMR and MDS System Integration
Secure integration with your SNF EMR, MDS submission system, and therapy documentation platform. No manual re-entry of MDS data, no charge lag on Part B therapy visits, no missed MA authorization renewals. Every resident's billing status tracked in real time across all payer types before claims are generated.
SNF Compliance Monitoring and Medicare Audit Protection
Part A consolidated billing compliance monitoring, Part B resident status verification before every claim, therapy billing for SNF documentation quality review, PDPM per diem reconciliation against expected rates, and MA authorization audit trails maintained per resident. Compliance issues identified before submission, not after a RAC or MAC audit generates a demand letter.
Quarterly SNF Revenue Integrity Reviews
Strategic reviews covering PDPM component accuracy by resident category, MDS assessment timeliness, MA authorization denial trends, Part B billing compliance, therapy billing capture rates, Medicaid billing accuracy, and payer contract performance. Specific action plans your administrator can implement to improve SNF billing revenue across every payer and every resident type.
Outsource SNF Billing to MBC
Ready to See What Your Skilled Nursing Facility Billing Services Team Is Actually Leaving Behind?
Schedule a 15-minute briefing with one of our SNF RCM Principals. No sales pitch. We will review your PDPM per diem accuracy by component, MDS assessment calendar compliance, MA authorization denial rate, and Part B therapy billing capture, and give your administrator a realistic annual recovery projection specific to your census mix and payer contracts. Explore our full medical billing services for skilled nursing facilities.