Adult primary care billing

Internal medicine billing services built for adult primary care

Care coordination minutes, specialist consult calls, and vaccine administration often happen without a matching claim. We track, code, and bill all of it, not just the visit.

Care coordination billing Consult and prolonged time Split-coverage review
Month-end care coordination and consult claims MONTH-END REVIEW
99427PCM, clinical staff timeclean
99452Consult prep time, requesting providerclean
FSSplit/shared visit modifierreview
G2212Prolonged office visit, Medicareflagged
Checked against monthly frequency limits Ready to submit
Where the revenue actually sits

A full week of coordination work can go unbilled without anyone noticing

Internal medicine physicians spend a meaningful share of their week on work that never puts a patient in front of them: reviewing labs and adjusting a care plan for a diabetic patient, calling a cardiologist about a shared case, rounding with a nurse practitioner on a hospitalized patient, approving a vaccine order. Each of these has a billing code attached. Most practices bill the visit and let the rest go.

The reason isn't neglect. Each of these services runs on its own consent, time log, and monthly window, and the rules differ enough between Medicare and commercial payers that a single charge sheet rarely covers all of them. Vaccines alone split across two different benefits depending on which one is given.

Codes we work with

99424–99427 99446–99452 99417 / G2212 Modifier FS 99484 90686 / G0008
Examples only. Actual coding follows the documentation and payer policy for each encounter.
Challenges

Complexities associated with Internal Medicine

As services might overlap with other specialties, Internal Medicine billing needs to be dealt with extreme care and attention to detail.

01 / Non-visit time

Care coordination minutes are real work that goes unbilled

Principal care management and behavioral health integration pay for exactly the kind of ongoing disease management and referral coordination internal medicine already does. Each program has its own consent, time log, and monthly billing window. Without a tracking workflow, the work happens and the claim doesn't.

02 / Consult time

Curbside consults rarely make it onto a claim

When a physician calls a specialist about a shared patient, that exchange is billable under the interprofessional consultation codes. The time thresholds and the rule against billing when the consultant has also seen the patient face to face nearby trip up most practices, so the call goes unbilled by default.

03 / Split coverage

Hospital and SNF rounds get billed under the wrong name

When a physician and an NP or PA round on the same inpatient or nursing facility case, payment goes to whoever performed the substantive portion: more than half the combined time, or the substantive part of the medical decision making. The claim needs a modifier and documentation from both clinicians to support it.

Common Errors

Errors in Internal Medicine Billing - We Diagnose and Correct

As the claim volume is high, billers and coders tend to overlook important details that can lead to denials and even hard rejections.

FS

Split/shared visit billed under the wrong clinician

Facility rounds get billed under whichever name is in the note by habit, not whoever actually met the time or decision-making threshold. Medicare recoups the difference when the record doesn't support it.

Vx

Vaccine billed to the wrong benefit

Shingles, RSV, and Tdap route through the drug benefit, not the medical benefit that covers flu and pneumococcal shots. Billing them the same way leaves the claim unpaid or puts a bill in front of a patient for something that should have been covered.

IC

Interprofessional consults never billed

The call to a specialist happens, the note gets written, and the claim never goes out because no one is tracking who spent the qualifying time or whether the consultant saw the patient face to face in the surrounding weeks.

PT

Prolonged time left off a long visit

When a visit legitimately runs long, the extra time supports an add-on code. Commercial payers and Medicare use different codes with different thresholds, and most charge sheets don't separate the two.

CM

PCM and CCM billed for the same patient in the same month

Principal care management covers one complex condition. Chronic care management requires two or more. Billing both for the same patient in the same month is a combination payer edits are built to catch.

QW

In-house lab tests missing the waiver modifier

CLIA-waived tests run in the office, like a rapid strep or a urine dip, need the correct waiver modifier on the claim. Without it, the claim gets rejected as an unauthorized site of testing regardless of how the specimen was handled.

Crucial Steps in Internal Medicine Billing

Coding, documentation, and payer rules

As there is a lot of involvement of E/M codes coupled with time-based services in Internal medicine, documentation needs to be spot on.

What the documentation needs to show

Clear documentation supports care coordination, split/shared services, and interprofessional consultations.

For care coordination time

  • Total minutes logged per month, split by who performed them, physician or clinical staff
  • Recorded consent, including the patient's acknowledgment of any cost-sharing
  • A written care plan tied to the specific condition being managed

For split/shared and consult services

  • Which clinician performed the substantive portion, by time or by decision making, named in the note
  • Discussion time versus data-review time, since the split decides which consult code applies
  • Face-to-face contact history with the consulting specialist in the surrounding weeks

Payer rules and benefit routing

Medicare, Medicare Advantage, Medicaid, and commercial plans can apply different benefit and billing rules.

What we check up front

  • Whether a vaccine falls under the medical benefit or the drug benefit before it's given, not after
  • Referral and prior authorization rules for outside labs and imaging under Medicare Advantage plans
  • Payer-specific limits on how often coordination and consult codes can be billed for the same patient

On split/shared visits

Applies in facility settings only, hospital, observation, or skilled nursing, not the office. Payment goes to whoever performed the substantive portion, more than half the combined time or the substantive part of the decision making, with the split/shared modifier on the claim.

The process

Every step customized to internal medicine

From two days prior to the appointment, A2Z Billings team starts with eligibility and ends the process with payment posting.

01

Eligibility

Benefit verification before the visit, including whether a scheduled vaccine sits under the medical or drug benefit for that patient's plan.

02

Time and service capture

Every billable piece pulled from the month: coordination time, consult time, prolonged time, and split/shared documentation, not just the visit code.

03

Scrub and submit

Claims checked against monthly frequency limits, mutually exclusive program combinations, and modifier requirements before they go out.

04

Denials and appeals

Denials routed to the actual cause, a benefit mismatch, a missing time log, a documentation gap, then appealed to that specific reason.

Why Us?

Unique services specific to internal medicine billing

A2Z Billings specialized and experienced team audits your internal medicine practice and develops a strategy that is specialty and state specific, keeping in view the ever-evolving payer guidelines.

Non-visit revenue capture

PCM, BHI, CoCM, and interprofessional consults tracked and billed on the schedule each program requires, instead of left as care that happened but was never claimed.

Vaccine benefit routing

Every vaccine checked against the medical and drug benefit before it's given, so the claim goes to the right place the first time.

Split/shared and incident-to review

Hospital, SNF, and office-based shared visits billed under the clinician the documentation actually supports.

Prolonged and consult time

Extra time and specialist consultations turned into billable add-ons instead of absorbed into the base visit for free.

Questions

Internal medicine billing, answered

What's the difference between PCM and CCM for our billing? +
PCM covers a single complex chronic condition and bills under 99424 through 99427. CCM requires two or more chronic conditions and uses a separate code set. A patient can't get both from your practice in the same month, though they can get PCM from one provider and CCM from another if different conditions are being managed.
Can we actually bill for calling a specialist about a shared patient? +
Yes, as long as the consulting specialist hasn't seen the patient face to face in the surrounding weeks and the discussion time or written report meets the threshold in the interprofessional consultation codes. We track that timing rule so the claim doesn't get reversed later.
A patient got billed for a shingles shot. What happened? +
Shingles, RSV, and Tdap vaccines route through the drug benefit, not the medical benefit that covers flu and pneumococcal shots. If the front desk checks the wrong benefit, the claim denies and the patient sees a bill for something that should have been covered.
How does billing work when our NP rounds with the physician on the same inpatient case? +
In a facility setting, payment goes to whichever clinician performed more than half the combined time or the substantive part of the decision making that day, with the split/shared modifier on the claim and both names in the note. Office visits run on a different set of rules built around direct supervision.
Is it worth billing for time that runs past a long visit? +
Often yes, but the extra time needed differs by payer. Medicare applies a stricter threshold than commercial plans do. We track both so the extra time isn't just absorbed into the base visit.
Can you work with our existing EHR and practice management system? +
Yes. We build the tracking, coding, and follow-up workflow around the systems your practice already uses rather than asking you to change platforms.

Find the billable work your practice is already doing

If care coordination, consult calls, split coverage, or vaccine administration are happening without a matching claim, we can show you where the revenue is and set up the tracking to capture it going forward.