Every Friday afternoon, the medical assistant at an internal medicine practice we work with puts a folder on the physician's desk. Inside are eight or nine home health plans of care, faxed by three different agencies, each waiting for a signature. The physician reads them, signs them, and the folder goes back to the fax machine. Nothing is billed. When we asked why, the office manager said she thought signing forms was part of the visit.
It is not. Certifying a Medicare patient for home health, recertifying at 60 days, and supervising the plan of care month after month are separately payable physician services with their own HCPCS codes. A primary care practice with 40 patients on home health at any given time is looking at real money over a year, and most of it goes unbilled.
This piece covers how to bill home health certification and the related codes: when G0180 and G0179 apply, what the face-to-face encounter has to show, how to count the 30 minutes behind G0181, and where Medicare reviewers find problems.
Key takeaways
- G0180 pays for the initial certification and G0179 for each 60-day recertification; both require the physician or allowed practitioner to review and sign the plan of care and to have had contact with the agency.
- The face-to-face encounter must happen within 90 days before or 30 days after the start of home health, must relate to the reason home health is needed, and must be documented in the certifying practitioner's own record.
- G0181 pays for care plan oversight when the practitioner personally spends 30 minutes or more in a calendar month on chart review, agency communication and plan adjustment; the time must be logged.
- Since the CARES Act of March 2020, nurse practitioners, clinical nurse specialists and physician assistants can certify home health and bill these codes under their own numbers.
What Medicare requires before anyone can certify
Medicare pays a home health agency, or HHA, only when a physician or allowed practitioner certifies five things: the patient is homebound, the patient needs intermittent skilled nursing or therapy, a plan of care has been established and is periodically reviewed, the patient is under the care of the certifying practitioner, and a face-to-face encounter occurred within the required window. The certification is the practitioner's statement that all five are true. The plan of care, historically the CMS-485 form and still called that in most offices, is the document the agency prepares and the practitioner signs.
Homebound has a specific meaning. The patient must need the help of another person or a device such as a walker to leave home, or leaving must be medically contraindicated, and leaving home must require a considerable and taxing effort. Absences for medical care, religious services or an occasional haircut do not break homebound status. Write the reason in the note: "requires walker and assistance of daughter to leave home due to right hemiparesis" survives review; "homebound" alone does not.
Since the CARES Act took effect in March 2020, nurse practitioners, clinical nurse specialists and physician assistants can certify and recertify home health and sign the plan of care, subject to state scope-of-practice rules. Before that, only a physician could.
| Code | What it pays for | Frequency | Key requirement |
|---|---|---|---|
| G0180 | Initial certification and plan of care review, patient not present | Once per certification period, only when the patient has not had Medicare home health in the prior 60 days | Signed plan of care plus documented contact with the agency |
| G0179 | Recertification, patient not present | Once per 60-day recertification period | Signed recertification with an estimate of how much longer services are needed |
| G0181 | Home health care plan oversight | Once per calendar month, one practitioner only | 30 minutes or more of documented personal time; face-to-face visit with the patient within the prior 6 months |
| G0182 | Hospice care plan oversight | Once per calendar month | Same time rule; patient under hospice, not home health |
How to bill G0180 and G0179
G0180 is the initial certification. It is billable once the practitioner has reviewed the agency's initial assessment and plan of care, signed it, and had at least some contact with the agency about the patient. The code description says "including contacts with home health agency and review of reports of patient status," so a plan of care that is signed with no other interaction is thin. A phone call from the agency nurse, a review of the OASIS summary (the standardized assessment the agency completes), or a written clarification of orders all count as contact. Note it in the chart: "Reviewed HHA plan of care dated 7/14, spoke with agency RN re: wound care frequency, signed."
G0180 can be billed only when the patient has not received Medicare-covered home health for at least 60 days before the new start of care. If the patient finished an episode three weeks ago and is being readmitted, that is a recertification, G0179, even though the agency may call it a new admission. Agencies do not always tell you this, and a G0180 billed inside an existing episode denies.
G0179 is the recertification, billable once per 60-day period. The recertification statement must include the practitioner's estimate of how much longer skilled services will be needed. Most agency forms have a line for it; if the line is blank, fill it in before signing, because a missing estimate is one of the specific things reviewers flag.
Neither code requires the patient to be present, and neither can be billed on the same date as an E/M visit that already covered the same review. Rates are modest; look up your locality's figure in the physician fee schedule search tool. The value comes from volume and from the fact that the work is already being done.
The face-to-face encounter
The Affordable Care Act added the face-to-face requirement, and it has been the single largest cause of home health claim denials since it took effect in 2011. The rule: the patient must have had a face-to-face encounter with the certifying practitioner, or with a physician who cared for the patient in an acute or post-acute facility, or with an NP, CNS or PA working with the certifying physician, no more than 90 days before the start of home health or within 30 days after it. The encounter must be related to the primary reason the patient needs home health, and telehealth counts when the encounter meets the telehealth rules in effect.
What trips practices up is the documentation. The certifying practitioner documents the date of the encounter on the certification. Since 2015, no separate narrative is required, but the practitioner's own medical record for that encounter must support homebound status and the need for skilled services. Reviewers pull the physician's note for the encounter date, and if it says "follow-up hypertension, doing well, return in 3 months" with nothing about mobility, wounds or therapy needs, the agency's claim denies and the agency comes back to the practice asking for an addendum. The agency can supply information to the practitioner, and the practitioner can incorporate it into the record, but the certifying practitioner must sign and date the incorporation. Late addenda written after a denial are weak.
The practical fix is a short block in the note whenever a physician expects to order home health: what skilled service is needed and why, and why the patient is homebound. Two sentences at the visit save an appeal later.
G0181: what counts toward the 30 minutes
Care plan oversight is the ongoing supervision of a patient on home health. G0181 pays for it when the practitioner personally spends 30 minutes or more in a calendar month, and it is the code most practices leave entirely on the table because nobody tracks the time.
Time that counts: reviewing the agency's reports, labs and other results; revising the plan of care; communicating with the agency nurse or therapist, a pharmacist or another physician about the patient; and integrating new information into the treatment plan. Time that does not count: phone calls with the patient or family, travel, the time spent on G0180 or G0179 signing, prescription refills without plan changes, and anything done by staff. Only one practitioner may bill G0181 for a patient in a month, the practitioner must have seen the patient face-to-face within the prior six months, and the practitioner cannot have a significant financial relationship with the agency.
The way to make this work is a running log, either a flowsheet in the EHR or a one-line entry each time: date, minutes, what was done. At month end, staff total the minutes for each home health patient; anyone at 30 or more gets a G0181 claim with the month's last date as the date of service. Here is a worked example: a physician has 12 patients on home health in July. She reviews weekly agency reports (about 4 minutes each) for all 12, calls agencies about medication changes for 5 of them (10 minutes each), and adjusts wound care orders for 2 (15 minutes each). Seven patients cross 30 minutes for the month; five do not. Seven G0181 claims go out, and the log shows exactly why. Without the log, the same physician bills zero or, worse, bills all 12 and fails the review.
The mistakes we see in audits
When our team runs an RCM audit for a primary care practice, home health codes show up in two ways: not billed at all, or billed without support. Both are fixable. The specific problems we find, in order of frequency: signed plans of care with no billing at all; G0180 billed for a readmission within 60 days that should have been G0179; G0181 billed with no time documentation; face-to-face encounter notes that do not mention the reason for home health; recertifications with the duration estimate left blank; and two practitioners in the same group both billing G0181 for one patient in the same month.
One habit we push back on: letting the agency's form do all the work. The practitioner is the one certifying, and the practitioner's record has to stand on its own.
Questions we hear
Can we bill G0180 when the physician signs the 485 during a patient visit?
The certification is a separate service from the visit, and Medicare pays it separately as long as the visit note does not already count the plan of care review toward its medical decision making. If they fall on the same day, document the review separately and bill both.
Do commercial payers and Medicare Advantage pay these codes?
Medicare Advantage plans generally follow Medicare's coverage of G0180, G0179 and G0181, though some require the agency to be in network. Commercial plans vary; some recognize the G codes, some want the CPT care plan oversight codes 99374 and 99375 instead, and some bundle the work into E/M. Check each contract and load the answer into your billing rules so the coder does not have to remember.
Who owns the time log for G0181?
The practitioner, because only the practitioner's personal time counts. The most successful setup we have seen is a smart phrase in the EHR that the physician drops into the chart each time they touch a home health patient's reports, with minutes and a one-line description, and a monthly report that staff run to find the patients over 30 minutes.
What to do this week
- Count the plans of care and recertifications your practitioners signed in the past 90 days and check how many produced a G0180 or G0179 claim.
- Add a two-sentence homebound and skilled-need block to the visit note template for any patient expected to need home health.
- Build the G0181 time log as an EHR flowsheet or smart phrase and show every practitioner how to use it.
- Ask your top three home health agencies to indicate on each form whether the patient is a new start of care or a readmission within 60 days.
- Route signed certifications to the biller the same day they are signed, with the signature date as the date of service, and add the home health codes to your charge capture checklist.
