ADHERENCESTAR KNOWLEDGE SERIES · 02

MEASURES / REFERENCE

Know the measure.
Find the right evidence.

Understand CMS measure data sources, eligibility, exclusions, cut points, and the difference between Part C, Part D, survey and operational measures.

FROM EVIDENCE TO MEASURE02 / 06
Quality in motion
Measure literacyData provenanceClinical + pharmacyREVIEWED 07 SEP 2026
THE ESSENTIALS

A measure starts with a definition.

Before asking whether performance improved, establish who belongs in the measure, what counts as success, and which evidence can support the answer.

01

Define the population first

The denominator identifies eligible observations; the numerator identifies those meeting the measure’s criteria. Eligibility windows, exclusions, and qualifying evidence belong to the selected specification. Use the applicable year’s full methodology.

CMS · 2026 technical notes ↗
02

A rate is not a star

Cut points translate a measure result into a star category. They are not universal percentage targets. Different measures can have different directions: a higher rate may be desirable for one measure and undesirable for another.

CMS · 2026 technical notes ↗
03

Choose the evidence source

The CMS performance-data collection is the starting place for official rating files and supporting documents. For an internal inventory, separate pharmacy, clinical, survey, and CMS administrative inputs so a missing source never silently becomes a zero.

CMS · Part C and D performance data ↗
THE EVIDENCE DESK

Where should you start?

Use this educational workspace to turn the guide into a practical conversation with your team.

Open the companion field guide ↗
Pharmacy evidence
Start with pharmacy claims and enrollment. Check date ranges, member matching, reversals, and the licensed medication lists. Example topic: Part D medication adherence.

A planning aid, not a complete measure catalogue. The selected measure’s official or licensed specification determines required inputs.

PUT IT INTO PRACTICE

Build a measure inventory your team can trust

A focused, four-step working guide for quality teams.

Read the field guide ↗
01Give every measure a durable record02Trace the inputs before the result03Separate missing from not applicable04Reconcile with an exception register
COMMON QUESTIONS

A little more clarity.

The roadmap includes licensed Part C validation, X12 834 and NCPDP intake, and Part C research-chat coverage. Production specification fidelity remains dependent on licensing and reconciliation.

Is every CMS measure a Stars measure?

No. CMS uses measures across multiple quality programs. Confirm the program and reporting year before using a definition found in a search result.

Can claims answer every quality question?

No. A data feed can only establish what it contains. A claim may identify a service without the clinical result needed by a particular measure. Keep missing laboratory, clinical, or survey evidence visible.

Is this a licensed measure specification?

No. This is an educational navigation guide. It does not reproduce licensed PQA or NCQA specifications or value sets. Use appropriately licensed materials for production calculation and reporting.

CONTINUE EXPLORING

Six perspectives.
One quality mission.