G47.31: Primary central sleep apnea

G47.31, primary central sleep apnea, is listed as a covered diagnosis in 11 Medicare billing and coding articles that apply to 38 HCPCS Level II codes, including G0399 (Home sleep test (hst) with type iii portable monitor…), G0400 (Home sleep test (hst) with type iv portable monitor…), G0398 (Home sleep study test (hst) with type ii portable monitor…). The articles come from 7 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 G47.31 as a covered diagnosis

CodeDescriptionMedicare coverageDMEPOS fee 2026 (state range)Articles listing it
G0399Home sleep test (hst) with type iii portable monitor, unattended; minimum of 4 channels: 2 respiratory movement/airflow, 1 ecg/heart rate and 1 oxygen saturationCarrier judgment—6
G0400Home sleep test (hst) with type iv portable monitor, unattended; minimum of 3 channelsCarrier judgment—6
G0398Home sleep study test (hst) with type ii portable monitor, unattended; minimum of 7 channels: eeg, eog, emg, ecg/heart rate, airflow, respiratory effort and oxygen saturationCarrier judgment—6
J2785Injection, regadenoson, 0.1 mgCarrier judgment—2
J0461Injection, atropine sulfate, 0.01 mgSpecial coverage instructions apply—2
J0153Injection, adenosine, 1 mg (not to be used to report any adenosine phosphate compounds)Special coverage instructions apply—2
Q9957Injection, perflutren lipid microspheres, per mlCarrier judgment—2
J1250Injection, dobutamine hydrochloride, per 250 mgSpecial coverage instructions apply—2
J0280Injection, aminophyllin, up to 250 mgSpecial coverage instructions apply—2
J1245Injection, dipyridamole, per 10 mgSpecial coverage instructions apply—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
C8928Transthoracic echocardiography with contrast, or without contrast followed by with contrast, real-time with image documentation (2d), includes m-mode recording, when performed, during rest and cardiovascular stress test using treadmill, bicycle exercise and/or pharmacologically induced stress, with interpretation and reportSpecial coverage instructions apply—2
C8929Transthoracic echocardiography with contrast, or without contrast followed by with contrast, real-time with image documentation (2d), includes m-mode recording, when performed, complete, with spectral doppler echocardiography, and with color flow doppler echocardiographySpecial coverage instructions apply—2
C8930Transthoracic echocardiography, with contrast, or without contrast followed by with contrast, real-time with image documentation (2d), includes m-mode recording, when performed, during rest and cardiovascular stress test using treadmill, bicycle exercise and/or pharmacologically induced stress, with interpretation and report; including performance of continuous electrocardiographic monitoring, with physician supervisionSpecial coverage instructions apply—2
Q9955Injection, perflexane lipid microspheres, per mlCarrier judgment—2
G0238Therapeutic procedures to improve respiratory function, other than described by g0237, one on one, face to face, per 15 minutes (includes monitoring)Carrier judgment—1
G0237Therapeutic procedures to increase strength or endurance of respiratory muscles, face to face, one on one, each 15 minutes (includes monitoring)Carrier judgment—1
G0239Therapeutic procedures to improve respiratory function or increase strength or endurance of respiratory muscles, two or more individuals (includes monitoring)Carrier judgment—1
J3490Unclassified drugsSpecial coverage instructions apply—1
C9399Unclassified drugs or biologicalsSpecial coverage instructions apply—1

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

Medicare policy articles listing G47.31

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 G47 diagnoses (Sleep disorders)

Frequently asked questions

Does Medicare cover G47.31 (Primary central sleep apnea)?

Medicare covers items and services, not diagnoses. 11 Medicare billing and coding articles list G47.31 as a covered diagnosis for 38 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 G47.31?

The Level II codes from the policies most specific to this diagnosis are G0399 (Home sleep test (hst) with type iii portable monitor…, 6 articles); G0400 (Home sleep test (hst) with type iv portable monitor…, 6 articles); G0398 (Home sleep study test (hst) with type ii portable monitor…, 6 articles); J2785 (Injection, regadenoson, 0.1 mg, 2 articles); J0461 (Injection, atropine sulfate, 0.01 mg, 2 articles). Code choice depends on the item supplied; check each code's descriptor.

Which Medicare policy articles list G47.31?

A57049 (Billing and Coding: Polysomnography and Other Sleep Studies); A57697 (Billing and Coding: Polysomnography and Other Sleep Studies); A56903 (Billing and Coding: Polysomnography and Other Sleep Studies), and 8 more articles.

What is ICD-10-CM code G47.31?

G47.31 is the ICD-10-CM code for primary central sleep apnea, in category G47 (Sleep disorders), chapter 6: Diseases of the nervous 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 6: Diseases of the nervous system · All diagnoses · HCPCS lookup