Prior authorization: document indication and inpatient need

Document the surgical indication (confirmed by the appropriate specialist) and that inpatient level of care is required (expected post‑operative recovery ≥2 midnights) when submitting prior authorization for CABG/valve procedures; automated approvals may be used but denials require licensed clinician review.

• Include listed CPT/ICD-10-PCS/CPT ranges when applicable per payer rules (see coding tables).

MS‑DRG crosswalks & revenue codes (informational)

MS-DRG crosswalks and revenue code groupings are provided for reference to support coding and billing (e.g., DRG 216‑219 and DRG 266‑267 for valve procedures; DRG 023‑025 and 026‑027 for craniotomy). These are informational and do not replace plan-specific prior authorization rules.

• Use the MS‑DRG listings to confirm expected inpatient assignment and revenue coding during claims processing.

Admission justification: document SI and IS criteria

For inpatient admission, document that the patient meets at least one Severity of Illness (SI) and/or one Intensity of Service (IS) criterion — e.g., specialist‑confirmed surgical indication, optimized comorbidities, and expected inpatient recovery ≥2 midnights.

• Confirm surgical indication by appropriate specialist and include evidence (clinical/lab/imaging).
• Document expected post‑operative recovery requiring ≥2 midnights when applicable.

Prior authorization: inpatient surgical CPTs require admission/intensity justification

When requesting prior authorization for listed inpatient surgical CPTs (examples include Whipple and nephrectomy CPTs), ensure the request demonstrates that admission and intensity criteria are met; follow payer rules for inpatient surgical admissions.

• Attach operative plan and evidence of need for inpatient post‑op recovery and monitoring.
• List the CPTs cited (e.g., Whipple CPTs 48150–48154; nephrectomy CPTs 50220, 50225, 50230, 50240, 50543–50548).

Prior authorization required for nephrectomy inpatient admission

Nephrectomy procedures require inpatient admission/authorization when the clinical presentation and IS/SI criteria are met; include the nephrectomy CPTs/PCS codes and documentation supporting inpatient recovery needs.

• CPTs: 50220, 50225, 50230, 50240, 50543–50548; ICD‑10‑PCS resection/excision codes also listed.
• Document specialist confirmation of surgical indication and expected ≥2 midnights when applicable.

Inpatient procedures: esophagectomy and liver resection require inpatient justification

Esophagectomy and liver resection are designated inpatient procedures — prior authorization and inpatient admission justification must show SI/IS criteria are met and that observation/ASC settings are not appropriate.

• Esophagectomy: include relevant CPT/PCS (e.g., CPT 43107–43113, 43116, 43287–43288; PCS 0DT10ZZ–0DT50ZZ) and evidence of need for inpatient post‑op recovery.
• Liver resection: include CPTs (e.g., 47120, 47122, 47125–47130) or ICD‑10‑PCS (0FT00ZZ, 0FB00ZZ–0FB04ZZ) and rationale for inpatient care.

AAA repair: always inpatient — document severity/intensity

Inpatient AAA repair (open or EVAR) is always inpatient — prior authorization must document surgical indication and severity/intensity of service supporting inpatient admission.

• CPT ranges for EVAR/open repair (e.g., 34701–34708, 35081–35082) and ICD‑10‑PCS patterns (04R00xx, 04V00xx, 04U0xxx) are listed for reference.
• Document expected post‑operative recovery and any ICU/step‑down needs when applicable.

Use inpatient authorization pathways for ALWAYS INPATIENT procedures

Use inpatient authorization pathways for procedures designated ALWAYS INPATIENT rather than observation or ASC billing; confirm inpatient status in the prior authorization request and documentation.

• Examples of ALWAYS INPATIENT procedures are listed in the decision matrix — do not submit as observation/ASC unless same‑day discharge exceptions clearly apply.
• Document SI/IS criteria and expected ≥2 midnights when applicable to support inpatient admission.

Complex/oncologic hysterectomy: document SI/IS for inpatient admission

Complex/oncologic hysterectomy requires documentation that SI/IS criteria are met for inpatient admission; these procedures are designated ALWAYS INPATIENT in the decision matrix.

• Provide specialist‑confirmed surgical indication, pre‑op optimization, and expected inpatient recovery when requesting admission authorization.
• Do not bill as observation/ASC for procedures designated ALWAYS INPATIENT.

Provider action: include SI/IS evidence and referenced codes in authorization requests

Follow the policy guidance in the cited sections when preparing authorization requests and concurrent review documentation — include SI/IS elements, expected recovery, and applicable code sets referenced in the policy.

• Ensure prior authorization submissions reference the procedure‑specific code groups and contain specialist confirmation of indication and inpatient need.

Provider action: follow full policy for authorization details

Refer to the full inpatient surgical procedures section for plan‑specific prior authorization expectations and required documentation when a specific chunk is not otherwise cited here.

• When in doubt, include specialist confirmation of surgical indication, pre‑op optimization, expected ≥2 midnights, and the relevant CPT/PCS codes.

Admission justification: document ≥1 SI and ≥1 IS

For admission justification, document at least one SI and one IS element — e.g., specialist‑confirmed indication plus need for post‑operative monitoring/ICU or procedure listed on CMS Inpatient‑Only list.

• SI examples: specialist confirmation, condition requiring surgery, optimized comorbidities, expected ≥2 midnights.
• IS examples: procedure requiring inpatient recovery, vital sign/drain management, IV antibiotics, ICU/step‑down needs.

Document extended‑stay triggers and evidence when LOS exceeded

When goal length of stay (LOS) is exceeded, document the specific extended‑stay trigger(s) and supporting clinical evidence to justify continued inpatient days per the policy examples (e.g., anastomotic leak, prolonged ileus, persistent air leak).

• State the trigger, cite imaging/lab findings or interventions, and include a targeted intervention plan (e.g., drainage, reoperation, NG decompression, TPN).

Provider action: include specialist confirmation and expected inpatient recovery for nephrectomy

For single‑item admissions (e.g., nephrectomy examples), include the specialist confirmation of indication and the expected inpatient recovery needs (≥2 midnights) in the authorization request.

• Cite the nephrectomy CPTs/PCS codes and clinical rationale for inpatient monitoring and services.

Provider action: confirm procedure codes and inpatient justification

For listed inpatient surgical procedures, confirm the procedure codes in the authorization and that SI/IS criteria are met to support inpatient admission; do not substitute observation/ASC billing when policy designates ALWAYS INPATIENT.

• Include both CPT and ICD‑10‑PCS codes when applicable and document the need for inpatient post‑operative services/monitoring.

Admission requirements: meet IS and SI elements

Providers must document that admission meets intensity‑of‑service elements (post‑op monitoring, IV therapies, ICU/step‑down if indicated) and severity‑of‑illness criteria (specialist‑confirmed indication, pre‑op optimization, expected ≥2 midnights) to justify inpatient admission.

• List specific IS elements expected (vitals q4h, drain management, IV antibiotics, PT/OT).
• Document SI elements including specialist confirmation and optimization status.

Provider action: include chunk‑126 SI/IS specifics in documentation

Refer to the admission section (chunk 126) for specifics on required SI/IS documentation when admitting patients for bariatric and other major procedures; include those elements in authorization and admission notes.

• Include specialist confirmation, pre‑op clearance, expected recovery length, and planned post‑operative services in the submission.

Step therapy: not applicable

Step therapy: Not applicable within this inpatient surgical procedures section.

Required clinical documentation: indication, pre‑op optimization, and triggers

Document the surgical indication by an appropriate specialist, pre‑operative optimization/clearance, and list specific medical‑necessity triggers when goal LOS is exceeded (e.g., mediastinal bleeding, respiratory failure, AKI requiring dialysis).

• Attach specialist consultation notes, pre‑op clearance documentation, and any imaging/lab evidence supporting extended stay triggers.

Extended‑stay documentation: trigger, evidence, intervention plan

When goal LOS is exceeded, document the trigger(s), supporting clinical evidence (labs, imaging, cultures), and a targeted intervention plan (e.g., drain placement, re‑operation, NG decompression, TPN) to justify continued inpatient days.

• Provide daily progress notes and planned interventions; reference guideline‑based sources where available.

Extended stay: document triggers, evidence, and intervention plan

For extended stays beyond goal LOS, document the specific trigger(s), supporting evidence, and a targeted intervention plan (one or more triggers required) — examples include anastomotic leak, prolonged ileus >5 days, wound infection, bile leak, persistent air leak.

• Include imaging reports, drain outputs, culture results, and consultant recommendations in the clinical record.

Discharge documentation checklist: document milestones for safe transition

At discharge, document attainment of milestones: stable vital signs ≥24 hours, pain controlled on oral analgesics, tolerating adequate oral diet (or documented NPO plan), wound status and drain plan, ambulation level, DVT prophylaxis plan, and scheduled surgeon follow‑up.

• Ensure discharge education and return‑to‑ED criteria are documented in the chart.

Extended‑stay documentation requirement: triggers, evidence, plan

When goal LOS is exceeded, document the trigger(s), the clinical evidence supporting them, and a targeted intervention plan (examples: anastomotic leak, prolonged ileus, wound infection). Include daily notes showing the planned and performed interventions.

• Document communication with consultants and specific temporizing or definitive procedures planned/performed.

Concurrent review: daily surgical team review and documentation required

Daily surgical team review and documentation of post‑operative progress, barriers, and plans are required for continued‑stay justification; include post‑op day assessments and rationale for ongoing inpatient care.

• Document daily assessments of pain control, diet tolerance, ambulation, wound/drain status, and explicit barriers to discharge.

Required documentation for authorization and continued stay

For authorization and continued stay, document: specialist‑confirmed surgical indication, pre‑operative optimization/clearance, expected need for ≥2 midnights when applicable, daily surgical team reviews, and specific clinical triggers justifying extended stay with a targeted plan.

• Include operative reports, consultant notes, and daily progress toward discharge milestones in the authorization/continued‑stay submission.

Extended‑stay example: document listed medical‑necessity triggers when LOS exceeded

When goal LOS is exceeded, document one or more specific medical‑necessity triggers (examples: persistent air leak >5 days, anastomotic leak, pneumonia/empyema, AF requiring IV control) with the clinical evidence and a targeted intervention plan to justify continued inpatient care.

• Provide objective data (chest tube output, imaging, cultures, ventilator settings) and a plan for definitive or temporizing management.

Admission documentation: show ≥1 SI criterion is met

For admission, document that the patient meets at least one Severity‑of‑Illness criterion (e.g., specialist‑confirmed surgical indication, condition requiring surgery, optimized comorbidities, expected ≥2 midnights) to justify inpatient status.

• Include evidence such as specialist notes, pre‑op clearance, and rationale for inpatient recovery rather than observation/ASC.

Concurrent review routine: daily reviews and documented justification for continued stay

Daily surgical team reviews are required during continued stay; document progress toward discharge milestones and any complications or functional needs that justify ongoing inpatient care.

• Record daily post‑op assessments and explicit barriers to discharge with planned interventions.

Required discharge documentation: document attainment of discharge criteria

At discharge, document stable vital signs for ≥24 hours, pain controlled on oral analgesics, tolerating diet (or documented NPO plan), wound status, drain plan, ambulation, DVT prophylaxis, scheduled surgeon follow‑up, and discharge education.

• Ensure documentation includes who provided discharge education and the follow‑up appointment date/time.

Extended‑stay examples: document listed triggers with evidence and plan

Examples of extended‑stay medical‑necessity triggers include anastomotic leak, prolonged ileus >5 days, wound infection, biliary leak, persistent air leak >5 days — document these triggers with evidence and an intervention plan when LOS is exceeded.

• Attach imaging, operative findings, drain outputs, and consultant recommendations to support continued stay.

Provider actions summary: document indication, clearance, expected recovery, and triggers

Summarize and document the surgical indication, pre‑operative clearance/optimization, expected post‑op recovery (including anticipated LOS ≥2 midnights when applicable), and when LOS is exceeded document one or more extended‑stay triggers with supporting evidence and a targeted intervention plan.

• Use daily progress notes and discharge planning documentation to demonstrate active management toward safe transition.

Extended Stay: document triggers, evidence, and targeted intervention plan

For extended stays, document the trigger(s), supporting clinical evidence, and the targeted intervention plan; at least one medical‑necessity trigger must be present to justify days beyond goal LOS.

• Examples and required documentation formats are provided in the extended‑stay guidance sections.

Concurrent review documentation: daily team review and documented progress/barriers

Daily surgical team review is required for concurrent review; document progress toward discharge milestones and explicitly note complications or functional barriers that justify continued inpatient care.

• Include multidisciplinary notes (PT/OT, case management) when placement or functional needs influence disposition.

Denial risk: admission/continued stay lacking medical justification

If admission or continued stay lacks medical justification (e.g., admission for non‑medical pre‑op reasons, continued stay when discharge criteria are met, or stay extended without documented clinical reason), the case risks denial or non‑approval.

• Avoid billing inpatient days when only social/placement delays or awaiting elective testing are the reason for continued stay.
• Ensure documentation specifically addresses medical necessity for each inpatient day.

Denial risk: continued stay beyond goal LOS without documented triggers

Continued inpatient days beyond goal LOS without documentation of one or more listed medical‑necessity triggers (e.g., mediastinal bleeding, respiratory failure >48 h, AKI requiring dialysis) may result in denial of extended stay coverage.

• When submitting continued‑stay requests, clearly identify the trigger, provide objective evidence, and describe the intervention plan.

Denial risk: neurosurgical extended stay without documented triggers

Extended stays lacking documentation of neurosurgical triggers (e.g., EVD not yet weaned, persistent cerebral edema requiring hyperosmolar therapy) may trigger denial of continued inpatient days for neurosurgical patients.

• Include daily neuro assessments, ICP/EVD parameters, and consultant recommendations when applicable.

Denial risk: inappropriate continued stay when discharge criteria met

Continued post‑operative stay when all discharge criteria are met or extending stay beyond expected LOS without documented medical justification is considered inappropriate and may be denied.

• Document why discharge criteria are not yet met or provide evidence of a listed extended‑stay trigger to justify additional days.

Denial risk: insufficient documentation for extended stay

Failure to document daily surgical team review and lack of documented medical justification for extended stay after goal LOS may risk concurrent review denial — include daily notes and explicit justification for each extra inpatient day.

• Ensure daily progress notes reference barriers to discharge and planned interventions; include consultant input as needed.

Denial risk: observation/ASC billing for ALWAYS INPATIENT procedures

Billing as observation or ambulatory when the policy designates a procedure as ALWAYS INPATIENT (e.g., esophagectomy, liver resection, nephrectomy) may trigger denial; use inpatient billing and authorization pathways for these procedures.

• Confirm site‑of‑service coding aligns with the policy decision matrix before submission.

Denial risk: continued stay without documented medical justification (e.g., awaiting placement)

Continued inpatient stay without documented medical justification (e.g., solely awaiting placement or elective testing when medically ready) may be denied; activate case management for placement delays and document medically necessary reasons for continued stay.

• Document efforts to arrange placement and the medical reasons preventing discharge.