How to Calculate Your Practice-Specific 2027 Medicare Impact

CMS may estimate that your specialty will gain 2%, decline 4%, or decline 7% under the proposed 2027 Medicare Physician Fee Schedule.

That is useful information.

It is not a financial forecast for your practice.

Two physician groups in the same specialty can experience meaningfully different reimbursement changes because their procedure mix, volume, site of service, geography and Medicare contracting arrangements are different.

For practice executives, CFOs and physician leaders, the real objective should be to move from:

“What is CMS doing to our specialty?”

to:

“What happens if our current Medicare volume is paid under the proposed 2027 fee schedule?”

That analysis is possible — and the underlying methodology is relatively straightforward once the right data are assembled.

Step 1: Start with actual utilization

The most important input is not revenue.

It is utilization.

At a minimum, a useful Medicare utilization file should contain:

CPT/HCPCS Code | Modifier | Volume

Ideally, it also contains:

• service date,

• place of service,

• service department,

• rendering provider,

• payer or insurance product,

• units, and

• actual allowed amount.

Why start with CPT and volume?

Because the cleanest way to isolate the effect of a fee-schedule change is to hold utilization constant.

In other words:

What if we performed exactly the same services, at exactly the same volume, but Medicare paid us under the proposed 2027 methodology instead of the 2026 methodology?

That creates a true rate-impact analysis rather than mixing reimbursement changes with changes in patient volume.

Step 2: Build the correct 2026 baseline

The next step is establishing the current Medicare payment methodology.

The Physician Fee Schedule is not simply:

CPT × conversion factor.

Each service contains:

• Work RVUs,

• Practice Expense RVUs,

• Malpractice RVUs,

• geographic adjustments, and

• the applicable conversion factor.

CMS also distinguishes between facility and non-facility Practice Expense RVUs, meaning the payment associated with a service can differ depending on where it is furnished.

A defensible analysis therefore needs to establish the correct 2026 values before attempting to calculate the 2027 difference.

For practices analyzing multiple quarters, it is also worth checking CMS's quarterly RVU files to determine whether any relevant codes changed during the year.

Step 3: Crosswalk each CPT to the proposed 2027 values

CMS has provided extensive supporting documentation with the proposed rule, including:

• 2026-to-2027 analytic crosswalks,

• proposed 2027 Addendum B,

• Practice Expense inputs,

• codes subject to PE phase-in,

• fully implemented PE RVUs,

• malpractice information,

• specialty impact files, and

• other rate-setting support files.

This allows each service to be compared across the major components:

Component	2026	2027 Proposed
Work RVU	Current	Proposed
Practice Expense RVU	Current	Proposed
Malpractice RVU	Current	Proposed
Conversion Factor	Current	Proposed
Estimated PFS Payment	Current	Proposed

The difference can then be calculated per service and multiplied by actual volume.

Step 4: Keep facility and non-facility services separate

This step is easy to overlook and can create a meaningful error.

Consider a physician practice performing both:

• office-based E/M and injections, and

• surgical procedures in a hospital or ambulatory surgery center.

The practice incurs the full office infrastructure for the first category, so Medicare generally uses the non-facility PE RVU.

For the surgery, the hospital or ASC receives separate facility payment, so the physician's PFS payment generally uses the facility PE RVU.

Applying a single site-of-service assumption to every CPT can therefore materially distort the result.

The better analysis maps the actual site of service at the service-line level whenever possible.

Step 5: Separate Original Medicare from Medicare Advantage

This may be one of the most financially important steps.

Original Medicare is directly governed by the Medicare Physician Fee Schedule.

Medicare Advantage plans are not necessarily required to reimburse a physician at the exact PFS rate.

However, many physician contracts are structured relative to Medicare.

A contract might pay:

• 95% of Medicare,

• 100% of Medicare,

• 105% of Medicare,

• 110% of Medicare,

• or another negotiated percentage.

If the contract is tied to the current Medicare fee schedule, a CMS reimbursement change may flow through to the MA population as well.

That means a practice should ideally analyze at least three buckets:

Original Medicare

Medicare Advantage / Medicare Replacement

Medicare Supplement, where applicable.

Then apply the appropriate contractual Medicare relationship to each bucket.

If the exact MA contract percentage is not yet known, modeling it at 100% of CMS as a starting assumption is reasonable — as long as the assumption is clearly identified and adjustable.

Step 6: Separate revenue impact from wRVU impact

This distinction matters for practices that use work RVUs in physician compensation.

A service can experience:

• a change in Medicare reimbursement,

• a change in work RVUs,

• both,

• or neither.

That means 2027 could affect the organization twice:

Revenue side

Medicare reimbursement changes.

Compensation side

Physician productivity or compensation changes if the group's compensation plan is based on CMS work RVUs.

Those effects should be modeled separately.

A reimbursement reduction does not necessarily imply the same percentage reduction in wRVUs.

And a wRVU revaluation can materially change physician compensation even if payer revenue is diversified beyond Medicare.

Step 7: Identify what is driving the change

An executive summary should not stop at:

“Medicare revenue is expected to decline 5.8%.”

Leadership needs to know why.

A useful model should attribute the change among:

• Work RVU changes,

• Practice Expense RVU changes,

• Malpractice RVU changes,

• Conversion Factor changes, and

• other identifiable payment-policy effects.

This becomes particularly important in 2027 because CMS is proposing meaningful changes to its Practice Expense methodology as part of a multi-year transition away from older specialty-level PE data.

For certain services, the proposed 2027 PE RVU may also benefit from phase-in protection.

That means practices should consider looking at both:

The proposed 2027 result

and

The longer-term fully implemented PE exposure.

Step 8: Find the CPTs creating the greatest exposure

Averages can hide a lot.

A practice might have 300 CPT codes in its Medicare data, but 10 codes may explain 80% of the financial impact.

That is where management attention should go.

A good analysis should rank:

Largest annualized reimbursement reductions

Largest percentage reductions

Largest wRVU reductions

Largest increases

Highest-volume affected services

This changes the conversation from an abstract Medicare issue to a manageable operational issue.

Leadership can then ask:

• Are these strategically important procedures?

• Are our Medicare Advantage contracts tied to CMS?

• Does the service remain financially viable?

• Does the compensation model need review?

• Are there site-of-service alternatives?

• Are coding and documentation complete?

• Are we accurately capturing all related services?

Specialty benchmark versus practice forecast

CMS's specialty estimates are valuable because they tell us the direction of travel.

For example, CMS estimates meaningful negative impact for specialties such as dermatology, otolaryngology and orthopedic surgery, while several behavioral-health practitioner categories show increases.

But specialty averages are built from national utilization.

Your practice is built from your utilization.

A group that performs a disproportionate amount of one heavily revalued procedure could substantially underperform its specialty average.

A different practice in the same specialty could outperform it.

That is why both analyses matter:

Specialty benchmark = context

Practice-specific analysis = forecast

Making the analysis accessible

At Appalachian Physician Advisors, we built the 2027 Practice Impact Analyzer to simplify this process.

A practice can enter or upload:

CPT | Modifier | Volume | Setting | Medicare Segment

and compare that utilization under 2026 Medicare rates and the proposed 2027 PFS.

The tool also allows users to adjust Medicare-related contractual assumptions separately for:

• Original Medicare,

• MA/Replacement plans, and

• Medicare Supplement plans.

The objective is not to replace a full reimbursement analysis.

It is to give physician leaders a fast, data-driven starting point for understanding where their exposure may be concentrated.

Because the biggest risk in reimbursement planning is often not that the estimate is imperfect.

It is that the organization never quantified the issue at all.

The question every physician group should be able to answer

Before approving a 2027 budget, physician leadership should be able to answer:

“If we perform the same Medicare services next year that we perform today, approximately how much will the proposed fee schedule change our revenue and our work RVUs?”

If that number is material, the next questions become much easier to prioritize.

CMS's 2027 rule remains proposed, with comments due September 14, 2026.

The final numbers may change.

But building the model now gives physician organizations time to understand the sensitivity before the rule becomes operational reality.

Explore the APA 2027 Practice Impact Analyzer and the complete Medicare Intelligence toolkit at APAHealthcare.com.

Source: CMS CY 2027 Medicare Physician Fee Schedule Proposed Rule and supporting files, CMS-1848-P. All 2027 policies and rates discussed are proposed and subject to change in the final rule.