Chapter 19 — Further Reading

Tier 1 — Verified canonical sources

The CPT Radiology, Pathology and Laboratory, and Medicine guidelines, current edition. Each section carries its own guidelines, and this chapter is a summary of them. The ultrasound completeness element lists, the contrast definition, the panel component lists, and the injection and infusion hierarchy all appear here in the source — with detail no summary can carry.

The CPT injection and infusion guidelines specifically. §19.9's hierarchy, the initial/sequential/ concurrent definitions, and the minimum durations distinguishing an infusion from a push. Two pages, and they govern an entire department's revenue.

The organ or disease-oriented panel definitions in CPT. Each panel lists its component tests explicitly. You cannot apply §19.4's rule without the lists, and the lists are short.

The CPT physical medicine and rehabilitation guidelines, including which codes are timed and which are not.

CPT Assistant. Subscription. The infusion hierarchy and the panel rule are recurring topics, and the infusion guidance in particular has needed frequent clarification.

Medicare Physician Fee Schedule relative value file, CMS. Free. The PC/TC indicator lives here — the fourth of the four columns this book promised in Chapter 14 — alongside the global period, multiple procedure, bilateral, co-surgery, and assistant-at-surgery indicators. Six columns, one free file.

Medicare Claims Processing Manual (Publication 100-04) — Chapter 13 for radiology services, Chapter 16 for laboratory services, and Chapter 5 for the outpatient therapy substantial-portion methodology. Read Chapter 5's therapy section directly; the eight-minute rule is stated more precisely there than in any secondary summary, including this one.

CMS Clinical Laboratory Improvement Amendments guidance, including the list of waived tests, the certificate types and their requirements, and the provider-performed microscopy procedure list. Free, and the waived list changes — if you run tests in an office, this is a page to bookmark rather than a fact to memorize.

CMS guidance on the anti-markup payment limitation and purchased diagnostic tests. §19.5 deliberately declines to summarize these in enough detail to bill on. If your organization purchases tests or interpretations, read the source.

Medicare Clinical Laboratory Fee Schedule. Free. What laboratory tests actually pay — which is the first of the three facts §19.12 says a practice needs before deciding to bring testing in house.

CMS guidance on outpatient therapy thresholds and the KX modifier, including the targeted medical review threshold.

OIG Work Plan and reports on laboratory testing and standing orders, drug testing, imaging utilization, infusion services, and outpatient therapy. Case Study 1 rests on the first of these.

Payer policies on: specimen handling (99000) · imaging guidance · the eye codes versus E/M codes · therapy unit methodology · and infusion documentation requirements.

Tier 2 — Attributed, specifics unverified

Radiology society coding resources. Particularly good on the professional/technical split, on contrast, and on the completeness requirements for ultrasound — which are the three things a radiology coder gets asked about.

Pathology and laboratory professional society material, including guidance on specimen counting in surgical pathology and on microbiology units.

Oncology and infusion nursing literature on medication administration documentation. Directly relevant to Case Study 2, and the more useful half of that conversation is the clinical half.

Physical therapy and rehabilitation professional association material on the substantial-portion methodology, which is explained better in that literature than anywhere else because it is the profession's daily arithmetic.

Ophthalmology society guidance on choosing between the eye codes and E/M codes. A genuine decision with no default, and the specialty literature is the only place it is treated seriously.

Published analyses of drug testing utilization and of the enforcement actions in that area.

Compliance material on standing orders and recurring order review. Thinner than it should be, which is part of why Case Study 1's pattern persists.

Tier 3 — Illustrative and constructed

All four arrangements in §19.1's 🔢 Code It.

The medication administration record excerpt in §19.9 and the infusion arithmetic built on it.

The therapy examples in §19.11, including the 8-and-8-minute case.

Case Study 1 in its entirety — the practice, the patient, the four years of monthly panels, and the utilization inquiry. Constructed; the pattern is a documented enforcement priority.

Case Study 2 in its entirety — the infusion center, the optional stop-time field, and the coder's aside in a meeting. Constructed; the mechanism is ordinary and the fix is a required field.

Account 10-4471's laboratory analysis in §19.12, including the in-house counterfactual and its arithmetic.

Three things worth doing

Read the CPT injection and infusion guidelines. Two pages. They govern the revenue of every infusion suite, emergency department, and oncology practice in the country, and most coders who bill them have never read them straight through.

Then go look at a medication administration record. An actual one. Find the start time, find the stop time, and notice whether both are there. Case Study 2 is an entire finding that lives in whether one field is required, and nobody in a billing office has ever looked.

And open the CLIA waived test list. Compare it to what your practice actually runs on the counter. It takes fifteen minutes, and the two possible outcomes — everything matches, or something does not — are both worth knowing, and one of them is worth knowing urgently.