I45.4: Nonspecific intraventricular block

I45.4, nonspecific intraventricular block, is listed as a covered diagnosis in 6 Medicare billing and coding articles that apply to 42 HCPCS Level II codes, including J0153 (Injection, adenosine, 1 mg (not to be used to report any…), J1250 (Injection, dobutamine hydrochloride, per 250 mg), J1245 (Injection, dipyridamole, per 10 mg). The articles come from 4 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 I45.4 as a covered diagnosis

CodeDescriptionMedicare coverageDMEPOS fee 2026 (state range)Articles listing it
J0153Injection, adenosine, 1 mg (not to be used to report any adenosine phosphate compounds)Special coverage instructions apply—4
J1250Injection, dobutamine hydrochloride, per 250 mgSpecial coverage instructions apply—4
J1245Injection, dipyridamole, per 10 mgSpecial coverage instructions apply—4
J0461Injection, atropine sulfate, 0.01 mgSpecial coverage instructions apply—3
J0280Injection, aminophyllin, up to 250 mgSpecial coverage instructions apply—3
J3490Unclassified drugsSpecial coverage instructions apply—2
J1569Injection, immune globulin, (gammagard liquid/gammagard liquid erc), 500 mgSpecial coverage instructions apply—1
J1561Injection, immune globulin, (gamunex-c/gammaked), non-lyophilized (e.g., liquid), 500 mgSpecial coverage instructions apply—1
J1459Injection, immune globulin (privigen), intravenous, non-lyophilized (e.g., liquid), 500 mgCarrier judgment—1
J1576Injection, immune globulin (panzyga), intravenous, non-lyophilized (e.g., liquid), 500 mgSpecial coverage instructions apply—1
J1557Injection, immune globulin, (gammaplex), intravenous, non-lyophilized (e.g., liquid), 500 mgCarrier judgment—1
J1556Injection, immune globulin (bivigam), 500 mgCarrier judgment—1
J1568Injection, immune globulin, (octagam), intravenous, non-lyophilized (e.g., liquid), 500 mgCarrier judgment—1
J1566Injection, immune globulin, intravenous, lyophilized (e.g., powder), not otherwise specified, 500 mgSpecial coverage instructions apply—1
J1554Injection, immune globulin (asceniv), 500 mgCarrier judgment—1
J1599Injection, immune globulin, intravenous, non-lyophilized (e.g., liquid), not otherwise specified, 500 mgCarrier judgment—1
J1577Injection, immune globulin (qivigy), 100 mgCarrier judgment—1
J2785Injection, regadenoson, 0.1 mgCarrier judgment—2
Q9957Injection, perflutren lipid microspheres, per mlCarrier judgment—2
Q9956Injection, octafluoropropane microspheres, per mlCarrier judgment—2
A9700Supply of injectable contrast material for use in echocardiography, per studySpecial coverage instructions apply—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
C8923Transthoracic echocardiography with contrast, or without contrast followed by with contrast, real-time with image documentation (2d), includes m-mode recording, when performed, complete, without spectral or color doppler echocardiographySpecial coverage instructions apply—2
C8924Transthoracic echocardiography with contrast, or without contrast followed by with contrast, real-time with image documentation (2d), includes m-mode recording, when performed, follow-up or limited studySpecial coverage instructions apply—2

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

Medicare policy articles listing I45.4

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 I45 diagnoses (Other conduction disorders)

Frequently asked questions

Does Medicare cover I45.4 (Nonspecific intraventricular block)?

Medicare covers items and services, not diagnoses. 6 Medicare billing and coding articles list I45.4 as a covered diagnosis for 42 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 I45.4?

The Level II codes from the policies most specific to this diagnosis are J0153 (Injection, adenosine, 1 mg (not to be used to report any…, 4 articles); J1250 (Injection, dobutamine hydrochloride, per 250 mg, 4 articles); J1245 (Injection, dipyridamole, per 10 mg, 4 articles); J0461 (Injection, atropine sulfate, 0.01 mg, 3 articles); J0280 (Injection, aminophyllin, up to 250 mg, 3 articles). Code choice depends on the item supplied; check each code's descriptor.

Which Medicare policy articles list I45.4?

A59105 (Billing and Coding: Off-Label Use of Intravenous Immune Globulin (IVIG)); A57183 (Billing and Coding: Cardiovascular Stress Testing, Including Exercise and/or Pharmacological Stress and Stress Echocardiography); A52423 (Billing and Coding: Infliximab and biosimilars), and 3 more articles.

What is ICD-10-CM code I45.4?

I45.4 is the ICD-10-CM code for nonspecific intraventricular block, in category I45 (Other conduction disorders), 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