I48.0: Paroxysmal atrial fibrillation

I48.0, paroxysmal atrial fibrillation, is listed as a covered diagnosis in 10 Medicare billing and coding articles that apply to 35 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…). 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 I48.0 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
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
J3490Unclassified drugsSpecial coverage instructions apply—2
A9512Technetium tc-99m pertechnetate, diagnostic, per millicurieCarrier judgment—1
A9560Technetium tc-99m labeled red blood cells, diagnostic, per study dose, up to 30 millicuriesCarrier judgment—1
A9538Technetium tc-99m pyrophosphate, diagnostic, per study dose, up to 25 millicuriesCarrier judgment—1
A9520Technetium tc-99m tilmanocept, diagnostic, up to 0.5 millicuriesCarrier judgment—1
C9176Tc-99m from domestically produced non-heu mo-99, [minimum 50 percent], full cost recovery add-on, per study doseSpecial coverage instructions apply—1
J2785Injection, regadenoson, 0.1 mgCarrier judgment—2
C8921Transthoracic echocardiography with contrast, or without contrast followed by with contrast, for congenital cardiac anomalies; completeSpecial coverage instructions apply—2
C8922Transthoracic echocardiography with contrast, or without contrast followed by with contrast, for congenital cardiac anomalies; follow-up or limited studySpecial coverage instructions apply—2

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

Medicare policy articles listing I48.0

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 I48 diagnoses (Atrial fibrillation and flutter)

Frequently asked questions

Does Medicare cover I48.0 (Paroxysmal atrial fibrillation)?

Medicare covers items and services, not diagnoses. 10 Medicare billing and coding articles list I48.0 as a covered diagnosis for 35 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 I48.0?

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.

Which Medicare policy articles list I48.0?

A56743 (Billing and Coding: Cardiovascular Nuclear Medicine); A57179 (Billing and Coding: Transesophageal Echocardiogram); A56809 (Billing and Coding: Transesophageal Echocardiography (TEE)), and 7 more articles.

What is ICD-10-CM code I48.0?

I48.0 is the ICD-10-CM code for paroxysmal atrial fibrillation, in category I48 (Atrial fibrillation and flutter), 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