The GV and GW modifier in medical billing are two of the most misapplied hospice codes in Medicare claims. One wrong modifier on a single claim line and the denial lands with provider liability attached. That means the provider absorbs the cost, not the payer.
Hospice modifiers exist because Medicare needs to know two things when a hospice patient receives care. Who is treating them, and whether the service connects to their terminal condition. The answer to those two questions determines which modifier goes on the claim.
What Hospice Modifiers GV and GW Actually Do
Both modifiers apply exclusively to Medicare claims for patients who have elected hospice benefits. They signal to Medicare that a non-hospice service is being billed separately and why that separate billing is legitimate.
Without one of these modifiers on the claim, Medicare presumes the service falls under the hospice benefit and denies the separate bill. According to CMS Claims Processing Manual Chapter 11, claims missing the required modifier are denied and provider liability is assigned.
When and How to Use GV Modifier in Medical Billing
The GV modifier identifies the attending physician as someone not employed or paid by the hospice agency. It applies when that physician treats the patient for a condition related to the terminal illness.
Two conditions must both be true to use GV:
- The treating physician is not employed or contracted by the hospice provider
- The service is related to the patient’s terminal diagnosis
A pulmonologist managing respiratory decline in a terminal lung cancer patient is a clean GV scenario. The service connects to the terminal condition, and the pulmonologist has no employment relationship with the hospice agency.
When and How to Use GW Modifier in Medical Billing
The GW modifier applies when the service has no connection to the terminal condition. It does not matter whether the provider is affiliated with the hospice or not. The modifier follows the service, not the provider relationship.
A hospice patient with terminal cancer who sees a dermatologist for a fungal skin infection unrelated to the cancer diagnosis is a GW scenario. The dermatologist appends GW to indicate the service sits entirely outside the hospice plan of care. Medicare then processes it as a standard Part B claim.
GV vs GW Modifier: The Difference That Decides the Claim
The distinction between GV and GW comes down to one question: is this service related to the terminal condition?
| Factor | GV Modifier | GW Modifier |
| Service related to terminal illness | Yes | No |
| Provider must be non-hospice employee | Yes | No requirement |
| Who can use it | Attending physician or NP not employed by hospice | Any provider billing for unrelated service |
| Claim form placement | Box 24D, CMS-1500 | Box 24D, CMS-1500 |
| Institutional claim equivalent | Not applicable | Condition Code 07 on UB-04 |
| Can both appear on same claim line | No, mutually exclusive | No, mutually exclusive |
The One Rule That Separates GV from GW
GV follows the provider. GW follows the service. If the attending physician is independent of the hospice and the service ties to the terminal diagnosis, GV applies. If the service has no connection to the terminal diagnosis regardless of who provides it, GW applies.
Providers who understand this distinction stop second-guessing modifier selection on every hospice claim.
Why GV and GW Are Mutually Exclusive
A single service cannot be both related and unrelated to the terminal condition. Appending both modifiers to the same claim line tells Medicare contradictory information and the claim will be denied. CMS is explicit on this point. GV and GW never appear together on the same service line.
Condition Code 07 and Modifier Placement Rules
Modifier selection is only part of the compliance picture. Where the modifier sits on the claim and when to substitute condition code 07 instead also affect whether the claim pays.
When to Use Condition Code 07 Instead of GW
Condition code 07 is the institutional claim equivalent of the GW modifier. When billing on a UB-04 or submitting an 837I electronic claim for services unrelated to the terminal illness, condition code 07 goes in the condition code field at form locators 18 through 28. The GW modifier is for CMS-1500 professional claims only.
Using GW on a UB-04 instead of condition code 07 is a common error that results in a denial. The format of the claim determines which one applies, not the nature of the service.
Does Modifier GW Go Before Modifier 25
No. When GW and modifier 25 appear together on the same claim line, modifier 25 goes first. Medicare modifier sequencing places payment-affecting modifiers before informational modifiers. Modifier 25 affects the payment determination. GW is informational, telling Medicare the service is unrelated to the terminal condition. The correct sequence is 25 then GW, in that order.
The same logic applies to GV. If modifier 25 and GV appear together, 25 is listed first.
Common Hospice Modifier Billing Errors and How to Prevent Them
Most hospice modifier denials trace back to a short list of mistakes that repeat across practices billing Medicare for hospice patients.
What the 2025 CMS Update Changed
CMS Change Request 13074, effective April 1, 2025, tightened the rules around missing hospice modifiers. Claims for non-terminal services submitted without GW or condition code 07 are now denied with provider liability assigned. Previously, some contractors allowed post-submission corrections. That flexibility is significantly reduced under the updated guidance.
This makes getting the modifier right on first submission more important than it has ever been.
Common errors to eliminate before submission:
- Submitting a claim for a hospice patient with no modifier at all
- Using GW on a UB-04 instead of condition code 07
- Appending both GV and GW to the same service line
- Using GV when the provider is contracted with the hospice agency
- Listing GW before modifier 25 when both appear on the same line
- Failing to document why the service is unrelated to the terminal diagnosis in the clinical record
Delaware Medical Billing’s medical billing services include hospice modifier review as part of the claim preparation process, so GV and GW errors are caught before the claim reaches Medicare. For practices with consistent hospice patient volume, a structured pre-submission review is what keeps provider liability off the table. Delaware Medical Billing’s medical coding services also verify that the correct modifier is matched to the correct service line before anything goes out, which removes the guesswork entirely.
Hospice Modifier Errors Are Preventable With the Right Billing Process
GV and GW errors are not complicated to fix. They are just easy to make without a structured review step in place. The wrong modifier, the wrong sequence, or a missing condition code 07 all produce the same result: a denied claim with provider liability that takes time and documentation to challenge.
Practices that build hospice modifier compliance into their pre-submission workflow stop absorbing costs that should never have been their liability. If hospice claim denials are a recurring problem, reach out to our team and we will identify exactly where the modifier errors are happening.
FAQs
What is the difference between GV and GW modifier for hospice?
GV is used when an attending physician not employed by the hospice treats a patient for a condition related to the terminal illness. GW is used when any provider treats a hospice patient for a condition unrelated to the terminal diagnosis. The key difference is whether the service connects to the terminal condition.
Does modifier GW go before modifier 25?
No. Modifier 25 goes first because it affects payment determination. GW is informational and follows modifier 25 when both appear on the same claim line.
When should condition code 07 be used instead of GW?
Condition code 07 is used on institutional claims submitted on a UB-04 or 837I electronic format. GW applies to professional claims on the CMS-1500. The claim format determines which one is correct, not the type of service.
Can GV and GW be billed on the same claim line?
No. GV and GW are mutually exclusive. A service is either related to the terminal condition or it is not. Appending both to the same line contradicts the claim and results in a denial.
