If you have been doing home health assessments for more than a few years, you remember when Section GG felt like something borrowed from the SNF world that nobody quite knew what to do with. That is no longer the case.

In OASIS-E2, the GG items — GG0130 (Self-Care) and GG0170 (Mobility) — are doing double duty: they directly determine the functional impairment level in your PDGM case-mix group, and they drive the Discharge Function Score, which carries 15% of your agency’s Total Performance Score (TPS) under the expanded HHVBP model. In short, how you score a patient’s ability to transfer, dress, and walk – now has a direct line to your agency’s Medicare payment rate.

GG Item Tip Sheet – 6-pages of much needed information

The GG items are among the most financially consequential questions on the entire OASIS instrument — and yet they are frequently rushed, misunderstood, or scored from habit rather than clinical observation.

This article covers what the GG items measure, how they connect to payment and quality scores, where the most costly mistakes happen, and what you can do right now. If you are an RN doing home health assessments, this is your section of the OASIS. Own it.

What Are the GG Items, Exactly?

GG0100 – Prior Functioning: Everyday Activities (assessed on SOC and ROC)

• A – Self Care
• B – Indoor Mobility (Ambulation)
• C – Stairs
• D – Functional Cognition

GG0110 – Prior Device Use – check all that apply (assessed on SOC and ROC)

• A – Manual Wheelchair
• B – Motorized Wheelchair and/or Scooter
• C – Mechanical Lift
• D – Walker
• E – Orthotics/prosthesis
• Z – None of the above

GG0130 – Self-Care covers seven Self-Care activities. (assessed on SOC, ROC, Follow-up, and DC). Those activities are:

• A — Eating –
• B — Oral Hygiene
• C — Toileting Hygiene
• E — Shower/Bathe Self
• F — Upper Body Dressing
• G — Lower Body Dressing
• H — Putting On/Taking Off Footwear

Note: GG0130D is not used in home health.

GG0170 (Mobility) covers 18 Mobility items. Those items include:

• A — Roll Left and Right
• B — Sit to Lying
• C — Lying to Sitting on Side of Bed
• D — Sit to Stand
• E — Chair/Bed-to-Chair Transfer
• F — Toilet Transfer
• G — Car Transfer
• I — Walk 10 Feet
• J — Walk 50 Feet with Two Turns
• K — Walk 150 Feet
• L — Walking 10 Feet on Uneven Surfaces
• M — One Step Curb
• N — Twelve Steps
• P — Picking Up Object from Floor
• Q–S — Wheelchair Mobility (if applicable)

Both GG0130 and GG0170 are completed at SOC/ROC and again at Discharge. The SOC/ROC scores drive PDGM payment grouping; the comparison between SOC/ROC and Discharge scores drives HHVBP quality outcomes. The scoring scale runs from 01 (Dependent) through 06 (Independent), with additional codes for activity not attempted — 07, 09, 10, and 88 — each with a precise clinical meaning that affects accuracy and quality calculations.

The Golden Rule of GG Scoring: Usual Performance, Not Best Performance

The single most important rule in GG scoring: you are documenting what the patient usually does — not what they demonstrated on their best day, not what you hope they will achieve. CMS defines “usual performance” as what the patient typically does across the first three days of care.

In practice, this means you may need to observe on more than one visit, speak with family or caregivers before finalizing scores, and document your sources. A single-visit snapshot is rarely sufficient, particularly for patients with variable function across the day or week.

This rule creates one of the most common and financially damaging GG errors in home health. A clinician observes a patient complete a transfer independently on assessment day and scores 06 (Independent). But the family reports the patient cannot get up without help any other day of the week.

The accurate score is not 06 — it reflects what the patient usually does, which is closer to 02 or 03. Scoring 06 instead of 02 can shift the entire functional impairment level from High to Medium — a difference of $300 to $700 per 30-day period the agency earned but will never collect.

Setup vs. Supervision: The Distinction That Trips Everyone Up

No single distinction causes more GG errors than the difference between code 05 (Setup/Cleanup Assistance) and code 04 (Supervision/Touching Assistance). They sound similar. They are not.

Code 05 (Setup) means the helper is entirely finished before the activity begins — clothes laid out, shower chair positioned, toothbrush ready — and then they leave. The patient completes the activity alone with no one present. This indicates less impairment and produces lower reimbursement.

Code 04 (Supervision/Touching Assistance) means the helper is present and actively involved during the activity — cueing, steadying, or maintaining contact for safety. The helper stays for the entire activity. This indicates more impairment and produces higher reimbursement.

A caregiver who stands at the patient’s side during every transfer — cueing and ready to catch — is a 04, not a 05. Many clinicians score this as 05 because the patient is “doing it themselves.” But someone present and actively engaged throughout is Supervision, not Setup. If the caregiver is present, watching, cueing, or steadying at any point during the activity, the correct code is 04. This single error repeated across multiple GG items can silently drop a patient’s functional impairment level from High to Medium without anyone flagging it.

GG Items and PDGM: Where Functional Scoring Meets Payment

Under PDGM, every 30-day payment period is assigned a functional impairment level — Low, Medium, or High — based primarily on GG0130 and GG0170 scores, along with legacy M-items M1800 through M1860. A High functional impairment level adds the greatest weight to the case-mix calculation and produces the highest reimbursement. The difference between High and Low can represent hundreds of dollars per period — compounded across a full caseload, that is tens to hundreds of thousands of dollars annually.

The GG scores you enter at SOC or ROC are locked in for that entire 30-day period. There is no mid-period correction. Once the period begins, payment is calculated and will not change regardless of what happens clinically over the next 30 days. Accuracy beginning day one is a financial decision that affects your agency’s revenue for the entire episode — score what you observe, document it precisely, and own it.

GG Items and HHVBP: Now 40% of Your Agency’s Total Performance Score

The Home Health Value-Based Purchasing (HHVBP) model is now fully expanded nationally and in its fourth performance year for CY 2026. Payment adjustments range from -5% to +5% of total Medicare reimbursement — a full 10-point swing between best and worst performers. For CY 2026, OASIS-based measures account for 40% of the Total Performance Score (TPS), meaning nearly half of your agency’s value-based payment adjustment rides on the accuracy of your clinical team’s OASIS assessments.

The most heavily weighted GG-based measure is the Discharge Function Score, carrying 15% of TPS for larger-volume agencies. It compares the patient’s functional status at discharge to what was statistically expected given their admission profile, using GG0130 and GG0170 at both SOC/ROC and Discharge. The Discharge GG assessment is just as important as the admission GG — an inaccurate or incomplete score at either end undermines the measure for that entire episode.

Three additional ADL improvement measures were added to the HHVBP measure set for CY 2026:

• M1830 — Improvement in Bathing
• M1810 — Improvement in Upper Body Dressing
• M1820 — Improvement in Lower Body Dressing

These use M-items rather than GG items, but the principle is the same: functional improvement from admission to discharge is now a payment driver, not just a clinical goal. CY 2026 performance determines CY 2028 payment adjustments — the decisions made today have a two-year financial runway attached to them.

GG Items Tip Sheet – 6 pages of important information

The Six GG Mistakes That Cost Agencies the Most

After years of home health documentation education, the same errors surface again and again — not because clinicians are careless, but because GG scoring is genuinely nuanced and most agencies have not invested enough time in teaching it well. Here are the five that carry the heaviest financial and compliance consequences.

Mistake 1 — Scoring “Can Do” Instead of “Usually Does”

Scoring what the patient demonstrated on one assessment visit rather than their typical daily performance is the single most common GG error in home health. If the family or caregiver describes a very different functional picture than what you observed during your visit — and this happens frequently — that discrepancy is clinically significant and must be investigated. Document what you heard from caregivers, reconcile it with your observation, and score based on usual performance. What the patient did once for you is data. What they do every day is the score.

Mistake 2 — Confusing Setup (05) with Supervision (04)

If a helper is present during the activity — cuing, steadying, or maintaining physical readiness to assist — that is Supervision: code 04, not 05. Code 05 applies only when the helper has completed everything before the patient begins and has physically left the scene. This is one of the most consistently miscoded distinctions in home health GG scoring, and it silently reduces the functional impairment level on case after case. When in doubt, ask yourself: was the helper present and actively engaged at any point during the activity? If yes, that is a 04.

Mistake 3 — Dashing GG Items Without a Valid Clinical Reason

Dashing a GG item means marking it as not attempted or not applicable without a documented clinical reason supporting that decision. Dashes in GG0130 or GG0170 create gaps in the HHVBP Discharge Function Score calculation, and they can count as non-compliance under the Home Health Quality Reporting Program (HHQRP) — which risks a 2% reduction in the Annual Payment Update. If a patient can safely attempt an activity, assess it, even if their performance is at the lowest end of the scale. A score of 01 is far more valuable — clinically and financially — than a dash.

Mistake 4 — Separating the OASIS from the Visit Note

This is one of the most common audit findings nationally, and it is one of the most damaging: the OASIS scores an activity one way, and the same-day visit narrative describes something clinically inconsistent. When auditors and RAC reviewers see a disconnect between what the OASIS says and what the note says, the higher-scoring response is thrown out — meaning the agency loses the reimbursement it earned. Your OASIS responses and your narrative documentation must tell exactly the same clinical story. If the OASIS says GG0170E — Chair/Bed-to-Chair Transfer is a 03, your visit note should describe the type and amount of assistance you or the caregiver provided during that transfer.

Mistake 5 — Neglecting the Discharge GG Assessment

Because the Discharge Function Score compares SOC/ROC GG scores to Discharge GG scores, an inaccurate or incomplete Discharge GG directly undermines your agency’s HHVBP performance — even when the admission GG was done with perfect precision. Both endpoints matter equally for this measure. The discharge assessment deserves the same level of clinical rigor, direct observation, and caregiver input as the admission assessment. It is not a formality. It is half of the most heavily weighted quality measure in HHVBP.

Mistake 6 — Ignoring Physician-Ordered Activity Restrictions

When a physician order restricts a patient from performing a specific activity — such as prohibiting rolling onto one side post-surgery — that GG item must be coded 88 (Not Attempted Due to Medical Condition or Safety Concerns), not a functional score. This applies even if the patient could physically perform a modified version of the activity. The physician restriction removes the item from functional scoring entirely. This was confirmed by CMS in the July 2026 Quarterly Q&A for GG0170A — Roll Left and Right.

A Word About AI and OASIS-E2

CMS has been explicit: no AI tool may generate or finalize an OASIS response — including EHR pre-population tools, ambient documentation software, or any AI-assisted scoring suggestion. The clinician must independently assess and confirm every GG item through direct observation; AI output cannot stand on its own. A score entered because the system suggested it, without independent clinical judgment to support it, is a compliance risk that falls on the clinician who signed the assessment. The rule is simple: you assessed it, you score it, you own it.

The Bottom Line

GG items are no longer background noise on the OASIS — they are one of the most financially and clinically consequential sections of the entire assessment instrument. They shape PDGM payment at admission, HHVBP performance at discharge, and your agency’s public quality scores in between. Scoring them accurately, consistently, and with genuine clinical observation is not extra work layered on top of your real job. It is the job. And it is the clearest, most direct way a home health RN can protect both patient outcomes and agency revenue at the same time — one assessment at a time.

GG Items Tip Sheet – 6 pages of important information

This article is intended for educational purposes and does not constitute legal, billing, or compliance advice. Always consult current CMS guidance and your agency’s compliance team for policy decisions.
— BHealthyRN.com