I42.3: Endomyocardial (eosinophilic) disease

I42.3, endomyocardial (eosinophilic) disease, is listed as a covered diagnosis in 13 Medicare billing and coding articles that apply to 44 HCPCS Level II codes, including C8925 (Transesophageal echocardiography (tee) with contrast, or…), C8926 (Transesophageal echocardiography (tee) with contrast, or…), C8927 (Transesophageal echocardiography (tee) with contrast, or…). 5 of these codes have a 2026 DMEPOS fee schedule amount; K0606 pays $3,588.90 (RR) depending on the state. The articles come from 6 Medicare contractors. A listed diagnosis supports medical necessity only; coverage still depends on the LCD's criteria and on documentation in the medical record.

HCPCS Level II codes with I42.3 as a covered diagnosis

CodeDescriptionMedicare coverageDMEPOS fee 2026 (state range)Articles listing it
C8925Transesophageal echocardiography (tee) with contrast, or without contrast followed by with contrast, real time with image documentation (2d) (with or without m-mode recording); including probe placement, image acquisition, interpretation and reportSpecial coverage instructions apply—4
C8926Transesophageal echocardiography (tee) with contrast, or without contrast followed by with contrast, for congenital cardiac anomalies; including probe placement, image acquisition, interpretation and reportSpecial coverage instructions apply—4
C8927Transesophageal echocardiography (tee) with contrast, or without contrast followed by with contrast, for monitoring purposes, including probe placement, real time 2-dimensional image acquisition and interpretation leading to ongoing (continuous) assessment of (dynamically changing) cardiac pumping function and to therapeutic measures on an immediate time basisSpecial coverage instructions apply—4
J0153Injection, adenosine, 1 mg (not to be used to report any adenosine phosphate compounds)Special coverage instructions apply—5
J1250Injection, dobutamine hydrochloride, per 250 mgSpecial coverage instructions apply—5
J1245Injection, dipyridamole, per 10 mgSpecial coverage instructions apply—5
J0461Injection, atropine sulfate, 0.01 mgSpecial coverage instructions apply—4
J0280Injection, aminophyllin, up to 250 mgSpecial coverage instructions apply—4
K0606Automatic external defibrillator, with integrated electrocardiogram analysis, garment typeCarrier judgment$3,588.90 (RR)1
K0609Replacement electrodes for use with automated external defibrillator, garment type only, eachCarrier judgment$1,148.78–$1,378.591
E0617External defibrillator with integrated electrocardiogram analysisCarrier judgment$433.30–$577.30 (RR)1
K0608Replacement garment for use with automated external defibrillator, eachCarrier judgment$172.74–$230.11 (NU)1
K0607Replacement battery for automated external defibrillator, garment type only, eachCarrier judgment$27.69–$36.87 (RR)1
A9999Miscellaneous dme supply or accessory, not otherwise specifiedCarrier judgment—1
A9500Technetium tc-99m sestamibi, diagnostic, per study doseCarrier judgment—2
A9502Technetium tc-99m tetrofosmin, diagnostic, per study doseCarrier judgment—2
A9505Thallium tl-201 thallous chloride, diagnostic, per millicurieCarrier judgment—2
A9501Technetium tc-99m teboroxime, diagnostic, per study doseCarrier judgment—2
Q9957Injection, perflutren lipid microspheres, per mlCarrier judgment—3
Q9956Injection, octafluoropropane microspheres, per mlCarrier judgment—3
Q9955Injection, perflexane lipid microspheres, per mlCarrier judgment—3
A9700Supply of injectable contrast material for use in echocardiography, per studySpecial coverage instructions apply—3
G0278Iliac and/or femoral artery angiography, non-selective, bilateral or ipsilateral to catheter insertion, performed at the same time as cardiac catheterization and/or coronary angiography, includes positioning or placement of the catheter in the distal aorta or ipsilateral femoral or iliac artery, injection of dye, production of permanent images, and radiologic supervision and interpretation (list separately in addition to primary procedure)Carrier judgment—2
G0269Placement of occlusive device into either a venous or arterial access site, post surgical or interventional procedure (e.g., angioseal plug, vascular plug)Special coverage instructions apply—2
J3490Unclassified drugsSpecial coverage instructions apply—2

19 more codes are listed. See every code with payment by region in Caduvo.

Medicare policy articles listing I42.3

A diagnosis listed as covered in a billing and coding article supports medical necessity for the article's codes; it does not guarantee payment. Coverage depends on the LCD's criteria, the contractor's jurisdiction and documentation in the medical record.

Other I42 diagnoses (Cardiomyopathy)

Frequently asked questions

Does Medicare cover I42.3 (Endomyocardial (eosinophilic) disease)?

Medicare covers items and services, not diagnoses. 13 Medicare billing and coding articles list I42.3 as a covered diagnosis for 44 HCPCS Level II codes: the diagnosis can support medical necessity for those codes, but payment still depends on the LCD's coverage criteria and the medical record.

Which HCPCS codes can be billed with ICD-10 I42.3?

The Level II codes from the policies most specific to this diagnosis are C8925 (Transesophageal echocardiography (tee) with contrast, or…, 4 articles); C8926 (Transesophageal echocardiography (tee) with contrast, or…, 4 articles); C8927 (Transesophageal echocardiography (tee) with contrast, or…, 4 articles); J0153 (Injection, adenosine, 1 mg (not to be used to report any…, 5 articles); J1250 (Injection, dobutamine hydrochloride, per 250 mg, 5 articles). Code choice depends on the item supplied; check each code's descriptor.

What does Medicare pay for equipment billed with I42.3?

Under the 2026 DMEPOS fee schedule (non-rural state fees): K0606 $3,588.90 (RR); K0609 $1,148.78 to $1,378.59; E0617 $433.30 to $577.30 (RR); K0608 $172.74 to $230.11 (NU). Medicare pays 80% of the allowed amount after the Part B deductible.

Which Medicare policy articles list I42.3?

A52458 (Automatic External Defibrillators - Policy Article); A56743 (Billing and Coding: Cardiovascular Nuclear Medicine); A57179 (Billing and Coding: Transesophageal Echocardiogram), and 10 more articles.

What is ICD-10-CM code I42.3?

I42.3 is the ICD-10-CM code for endomyocardial (eosinophilic) disease, in category I42 (Cardiomyopathy), chapter 9: Diseases of the circulatory system.

Next steps

Sources: CMS Medicare Coverage Database billing and coding articles (covered ICD-10 code lists and HCPCS links); ICD-10-CM FY2026; CMS HCPCS Level II release October 2026; CMS DMEPOS fee schedule 2026 (non-rural state fees). Not billing or legal advice.

Chapter 9: Diseases of the circulatory system · All diagnoses · HCPCS lookup