CPT 99305 vs. 99306: Complete Nursing Facility Billing & Coding Guide for 2026
Billing teams see this question constantly: a patient is admitted to a nursing facility, the note is solid, and the coder still has to decide between CPT 99305 and CPT 99306. The two codes sit right next to each other in the initial nursing facility care family, and the gap between "moderate" and "high" medical decision-making isn't always obvious from a quick read of the chart. This guide walks through how that decision actually gets made — not by counting diagnoses, but by weighing the problems addressed, the data reviewed, and the risk involved, the way current E/M guidance requires.
Quick Answer: CPT 99305 vs. 99306
Both codes report initial nursing facility care — the first evaluation at admission, billed once per admission. CPT 99305 applies when the encounter reflects moderate medical decision-making (or a corresponding amount of total time). CPT 99306 applies when the encounter reflects high medical decision-making (or more total time). The distinction depends on the number and complexity of problems addressed, the data reviewed and analyzed, and the risk of the management decisions made — all of which must be clearly supported in the documentation, not just implied by diagnosis count.
What Are CPT 99305 and 99306?
CPT 99305 and 99306 both fall inside the initial nursing facility care code set (99304-99306), used for the practitioner's first evaluation of a patient entering a skilled nursing facility (SNF) or nursing facility (NF). Since the 2023 E/M guideline changes, these codes are leveled using either the total medical decision-making involved or the total time spent by the practitioner on the date of the encounter — not by scoring history and exam as separate components. A medically appropriate history and exam are still expected, but they no longer drive the code selection on their own.
99305 sits in the middle of the initial-care range and reflects moderate-complexity decision-making. 99306 sits at the top and reflects high-complexity decision-making. Because both are billed once per admission, choosing the wrong one isn't a small issue — it affects the entire claim for that admission, not just a single day.
CPT 99305 vs. 99306: Side-by-Side Comparison
How to Determine Whether 99305 or 99306 Is Supported
Code selection under current E/M guidance comes down to three MDM elements, plus medical necessity and documentation. None of them should be evaluated in isolation.
1. Review the Patient's Problems
Start with what's actually being addressed at this encounter — not the patient's full problem list. A patient with five chronic diagnoses that are all stable and unchanged doesn't automatically support a higher level than a patient with two problems, one of which is acute and unstable. Severity and status (stable vs. worsening vs. undiagnosed) matter more than the raw count.
2. Evaluate Data Reviewed and Analyzed
This includes labs, imaging, prior records reviewed, independent interpretation of tests, and discussions with other treating providers. A moderate level typically reflects a moderate amount of data reviewed; a high level typically reflects more extensive review, independent interpretation, or discussion with an external source about the patient's management.
3. Assess Risk of Patient Management
Risk looks at the management decisions themselves — starting or adjusting medications with monitoring requirements, decisions about hospitalization or escalation of care, or major changes to the care plan. Moderate risk generally involves routine adjustments with manageable monitoring; high risk generally involves decisions with more significant potential consequences.
4. Confirm Medical Necessity
Medical necessity should be evident from the clinical picture, not just asserted. The note should make clear why this level of decision-making was required for this patient on this date — not simply that a comprehensive workup was performed out of habit.
5. Make Sure the Documentation Supports the Reported Level
All three MDM elements should be traceable in the note. If the chart shows high-complexity problems but the documented data review and risk discussion look minimal, the note may only support a moderate level — regardless of how complex the patient seems on paper.
Audit risk note: Payers and auditors look for exactly this kind of mismatch — a diagnosis list that looks severe next to an assessment and plan that doesn't explain the reasoning behind it. Diagnosis count alone has never been sufficient to justify 99306. |
CPT 99305 Documentation Checklist
☐ Problems addressed are clearly identified, with status (stable, worsening, new)
☐ Data reviewed (labs, imaging, prior notes) is documented, not just referenced
☐ Moderate-risk management decisions are explained, including monitoring plans
☐ Assessment and plan connect logically to the problems and data discussed
☐ Medically appropriate history and exam are documented
☐ Total time is documented if time is being used to support the level
CPT 99306 Documentation Checklist
☐ At least one problem is documented as severe, unstable, or posing a threat to life or bodily function
☐ Extensive data review is documented, including independent interpretation or external discussion where applicable
☐ High-risk decisions are clearly explained (e.g., significant medication changes, escalation of care)
☐ The reasoning for high-complexity decision-making is explicit, not assumed from diagnosis count
☐ Modifier AI is applied if this practitioner is the principal physician of record
☐ Total time is documented if time is being used to support the level
Documentation Elements Billing Teams Should Check
99305 vs. 99306 Coding Examples
These scenarios are educational illustrations only. Actual code selection always depends on the complete medical record and the applicable coding guidelines in effect at the time of service.
Example 1 — Likely 99305 Situation: A patient is admitted with well-documented but active type 2 diabetes and hypertension, both requiring medication adjustment at admission. Documentation: Notes describe current control status, medication changes with monitoring plans, and review of recent labs. Coding consideration: Multiple stable-to-moderate problems with routine data review and moderate-risk medication management. Likely level: 99305. Why: The problems and risk reflect moderate complexity — active management, but not severe or unstable. |
Example 2 — Likely 99306 Situation: A patient is admitted post-hospitalization with an unstable cardiac arrhythmia requiring close monitoring and a significant medication regimen change. Documentation: Notes describe the acute instability, extensive review of hospital records and recent test results, and a detailed discussion of the risk associated with the new regimen. Coding consideration: A severe, unstable problem with extensive data review and high-risk management. Likely level: 99306. Why: The problem's acuity, the depth of data reviewed, and the risk of the management plan all point to high complexity. |
Example 3 — Documentation Doesn't Support the Higher Level Situation: A patient has multiple chronic diagnoses listed on admission, but the note offers only a brief summary with no discussion of data reviewed or the reasoning behind the plan. Documentation: Problem list is long; assessment and plan are short and generic. Coding consideration: Diagnosis count alone doesn't establish MDM complexity. Likely level: Documentation as written may only support 99304, regardless of how the problems look on the surface. Why: Without documented data review and risk reasoning, a higher level isn't supported — even if the patient is genuinely complex. |
Common CPT 99305 and 99306 Billing Errors
Common Error | Why It Happens | Consequence | Prevention |
Selecting 99306 by diagnosis count alone | Assumption that more diagnoses means higher complexity | Downcoding or denial on review | Confirm all three MDM elements are documented |
Copy-forward documentation | Reusing prior notes to save time | Note doesn't reflect this encounter's decision-making | Require encounter-specific updates |
Unsupported MDM level | Level selected before documentation is reviewed | Audit exposure, clawback risk | Internal coding review before submission |
Missing medical necessity | Workup performed routinely, not tied to need | Denial for lack of necessity | Document why this level was clinically required |
Inconsistent assessment and plan | Plan doesn't follow documented problems/data | Level appears unsupported | Ensure plan ties back to problems and data |
Overlooking payer-specific rules | Assuming Medicare rules apply universally | Denials from commercial/MA payers | Verify current payer policy before submission |
Seeing 99305/99306 denials or downcoding on review? Our revenue cycle team can help identify whether the pattern is coming from documentation gaps, coding selection, or payer-specific requirements. |
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How Documentation Can Prevent Nursing Facility Billing Denials
Denials on 99305 and 99306 rarely start at the claim submission stage — they start with documentation that doesn't clearly support the level being reported. Following the chain from encounter to payment shows where the risk actually builds.
1. Documentation captures problems, data, and risk at the point of care
2. Coding reflects what the documentation actually supports
3. Claim submission includes accurate provider, modifier, and encounter data
4. Payer review checks the claim against coverage and documentation rules
5. Payment reflects a level the documentation can actually defend
Billing team tip: A short internal coding review — checking that the level matches the documented MDM before the claim goes out — catches most 99305/99306 mismatches before they ever reach the payer. |
Nursing Facility Billing Workflow for 99305 and 99306
1. Clinical Encounter
2. Documentation
3. Code Selection
4. Internal Coding Review
5. Claim Submission
6. Payer Adjudication
7. Denial/Appeal Management
8. Payment Posting
9. A/R Follow-Up
CPT 99305 vs. 99306: Quick Decision Framework
This is a documentation-review framework, not an automated coding tool — final code selection always requires professional coding judgment applied to the complete record.
1. Is this an initial nursing facility service, not a follow-up visit?
2. Does the documentation clearly support the medical decision-making level being considered?
3. Are the problems addressed at this encounter clearly documented, including severity and status?
4. Is the data reviewed and analyzed specifically documented, not just referenced?
5. Is the risk of the management decisions documented and clinically supported?
6. Does medical necessity support the level of service reported?
7. Have payer-specific requirements for this claim been verified?
Key takeaway: If the documentation does not support the higher level, do not report it simply because it may reimburse at a higher rate. |
How Medical Billing Companies Can Help Nursing Facilities
Getting 99305 vs. 99306 right consistently, across every provider and every admission, is a workflow problem as much as a coding one. MedCloudMD supports nursing facility organizations with coding review, claim submission, documentation-related billing issue resolution, denial management, A/R follow-up, eligibility verification, payment posting, and ongoing revenue cycle reporting.
Our approach pairs AI-assisted monitoring — flagging denial patterns, prioritizing A/R, and surfacing claims that may need documentation follow-up — with human billing specialists who review the actual record before anything is submitted or appealed. The technology speeds up pattern recognition; it doesn't replace professional coding judgment, and it never determines compliant coding on its own.
Frequently Asked Questions
What is the difference between CPT 99305 and 99306?
99305 reflects moderate medical decision-making at an initial nursing facility visit; 99306 reflects high medical decision-making. The difference is based on the problems addressed, data reviewed, and risk of management — not simply the number of diagnoses.
Is 99306 always used for more complex patients?
Not automatically. 99306 is appropriate when the documentation supports high-complexity MDM or a corresponding amount of time — a patient can have several diagnoses and still document only moderate complexity if the problems are stable and routinely managed.
What documentation is needed for 99305?
The note should identify the problems addressed and their status, the data reviewed, and the moderate-risk reasoning behind the management plan, along with a medically appropriate history and exam.
What documentation supports 99306?
The note should clearly show at least one severe or unstable problem, extensive data review, and high-risk management decisions, with reasoning explicit enough to stand up to payer review.
Can a provider choose 99306 because the patient has multiple diagnoses?
No. Diagnosis count alone doesn't establish MDM complexity. The problems' severity and status, the data reviewed, and the risk of management decisions all have to be documented and support the level reported.
Are 99305 and 99306 initial nursing facility care codes?
Yes. Both are part of the initial nursing facility care family (99304-99306), billed once per admission by the evaluating practitioner.
What role does MDM play in nursing facility coding?
Since the 2023 E/M guideline update, MDM (or total time) is the primary basis for leveling nursing facility E/M codes, rather than scored history and exam components.
Can payer requirements differ between 99305 and 99306?
Yes. While Medicare's coding framework is well documented, commercial and Medicare Advantage payers may apply their own documentation expectations or claim edits. Payer-specific policy should always be verified.
What are common nursing facility billing errors involving these codes?
Frequent issues include selecting a level based on diagnosis count, copy-forward documentation, unsupported MDM, missing medical necessity, and assessment/plan language that doesn't connect back to the problems and data discussed.
How can billing teams reduce nursing facility claim denials?
An internal coding review that checks documentation against the reported level before submission — plus ongoing tracking of denial patterns — catches most 99305/99306 mismatches before they reach the payer.
Sources and References
• Centers for Medicare & Medicaid Services (CMS) — Medicare Claims Processing Manual, Chapter 12, Nursing Facility Services
• CMS — Evaluation and Management Services guidance, Medicare Learning Network (MLN)
• CMS — Physician Fee Schedule Final Rule, current calendar year
• American Medical Association (AMA) — CPT Code Book, Nursing Facility Services section
Disclaimer
This article is for educational and informational purposes only and is not legal, coding, billing, or compliance advice. CPT codes, CMS policy, and payer requirements can change, and coding should always be based on the services actually performed and the documentation available for each encounter. Payer-specific requirements may differ from Medicare's framework. Providers and billing organizations should verify current official guidance from CMS, the AMA CPT code book, and applicable payer policy, and should consult qualified coding, billing, or legal professionals for guidance on specific situations. MedCloudMD does not provide legal advice.
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