ICD-10-CM Codes
R00-R99
R00-R09
R00-
2023 ICD-10-CM Diagnosis Code R00.1

2023 ICD-10-CM Diagnosis Code R00.1

Bradycardia, unspecified

2016

2017

2018

2019

2020

2021

2022

2023

Billable/Specific Code

R00.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
The 2023 edition of ICD-10-CM R00.1 became effective on October 1, 2022.
This is the American ICD-10-CM version of R00.1 - other international versions of ICD-10 R00.1 may differ.

Applicable To

Sinoatrial bradycardia
Sinus bradycardia
Slow heart beat
Vagal bradycardia

Use Additional

Use Additional Help

Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.

code for adverse effect, if applicable, to identify drug (T36-T50
ICD-10-CM Range T36-T50
Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances
Code First
- , for adverse effects, the nature of the adverse effect, such as:
- adverse effect NOS (T88.7)
- aspirin gastritis (K29.-)
- blood disorders (D56-D76)
- contact dermatitis (L23-L25)
- dermatitis due to substances taken internally (L27.-)
- nephropathy (N14.0-N14.2)
Includes
- adverse effect of correct substance properly administered
- poisoning by overdose of substance
- poisoning by wrong substance given or taken in error
- underdosing by (inadvertently) (deliberately) taking less substance than prescribed or instructed
Note
- The drug giving rise to the adverse effect should be identified by use of codes from categories T36-T50 with fifth or sixth character 5.
Type 1 Excludes
- toxic reaction to local anesthesia in pregnancy (O29.3-)
Type 2 Excludes
- abuse and dependence of psychoactive substances (F10-F19)
- abuse of non-dependence-producing substances (F55.-)
- immunodeficiency due to drugs (D84.821)
- drug reaction and poisoning affecting newborn (P00-P96)
- pathological drug intoxication (inebriation) (F10-F19)
Use Additional
- code(s) to specify:
- manifestations of poisoning
- underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9)
- underdosing of medication regimen (Z91.12-, Z91.13-)
- T36 Poisoning by, adverse effect of and unde...
- T37 Poisoning by, adverse effect of and unde...
- T38 Poisoning by, adverse effect of and unde...
- T39 Poisoning by, adverse effect of and unde...
- T40 Poisoning by, adverse effect of and unde...
- T41 Poisoning by, adverse effect of and unde...
- T42 Poisoning by, adverse effect of and unde...
- T43 Poisoning by, adverse effect of and unde...
- T44 Poisoning by, adverse effect of and unde...
- T45 Poisoning by, adverse effect of and unde...
- T46 Poisoning by, adverse effect of and unde...
- T47 Poisoning by, adverse effect of and unde...
- T48 Poisoning by, adverse effect of and unde...
- T49 Poisoning by, adverse effect of and unde...
- T50 Poisoning by, adverse effect of and unde...
with fifth or sixth character 5)

Type 1 Excludes

Type 1 Excludes Help

A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as R00.1. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

neonatal bradycardia (
ICD-10-CM Diagnosis Code P29.12
Neonatal bradycardia
P29.12
)

The following code(s) above R00.1 contain annotation back-references

Annotation Back-References

In this context, annotation back-references refer to codes that contain:

Applicable To annotations, or
Code Also annotations, or
Code First annotations, or
Excludes1 annotations, or
Excludes2 annotations, or
Includes annotations, or
Note annotations, or
Use Additional annotations

that may be applicable to R00.1:

R00-R99
2023 ICD-10-CM Range R00-R99
Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
Note
- This chapter includes symptoms, signs, abnormal results of clinical or other investigative procedures, and ill-defined conditions regarding which no diagnosis classifiable elsewhere is recorded.
- Signs and symptoms that point rather definitely to a given diagnosis have been assigned to a category in other chapters of the classification. In general, categories in this chapter include the less well-defined conditions and symptoms that, without the necessary study of the case to establish a final diagnosis, point perhaps equally to two or more diseases or to two or more systems of the body. Practically all categories in the chapter could be designated 'not otherwise specified', 'unknown etiology' or 'transient'. The Alphabetical Index should be consulted to determine which symptoms and signs are to be allocated here and which to other chapters. The residual subcategories, numbered .8, are generally provided for other relevant symptoms that cannot be allocated elsewhere in the classification.
- The conditions and signs or symptoms included in categories R00-R94 consist of:
- (a) cases for which no more specific diagnosis can be made even after all the facts bearing on the case have been investigated;
- (b) signs or symptoms existing at the time of initial encounter that proved to be transient and whose causes could not be determined;
- (c) provisional diagnosis in a patient who failed to return for further investigation or care;
- (d) cases referred elsewhere for investigation or treatment before the diagnosis was made;
- (e) cases in which a more precise diagnosis was not available for any other reason;
- (f) certain symptoms, for which supplementary information is provided, that represent important problems in medical care in their own right.
Type 2 Excludes
- abnormal findings on antenatal screening of mother (O28.-)
- certain conditions originating in the perinatal period (P04-P96)
- signs and symptoms classified in the body system chapters
- signs and symptoms of breast (N63, N64.5)
Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
R00
ICD-10-CM Diagnosis Code R00
Abnormalities of heart beat
Type 1 Excludes
- abnormalities originating in the perinatal period (P29.1-)
Type 2 Excludes
- specified arrhythmias (I47-I49)
Abnormalities of heart beat

Approximate Synonyms

Atrioventricular (av) bradycardia (slow heart beat)
Av-junctional (nodal) bradycardia
Bradycardia
Bradycardia (slow heart rate)
Bradycardia, drug induced, in therapeutic use
Drug-induced bradycardia
Persistent sinus bradycardia
Sinus bradycardia
Sinus bradycardia (slow heart beat)
Sinus bradycardia, persistent

Clinical Information

A disorder characterized by a dysrhythmia with a heart rate less than 60 beats per minute that originates in the sinus node.
A heart rate of less than 60 beats per minute, with its origin in the sinus node.
An abnormally slow heartbeat; as applied in adult medicine, it is generally defined as a heart rate of under 60 beats per minute.
Cardiac arrhythmias that are characterized by excessively slow heart rate, usually below 50 beats per minute in human adults. They can be classified broadly into sinoatrial node dysfunction and atrioventricular block.
Excessive slowness in the action of the heart, usually with a heart rate below 60 beats per minute.
Non-sinus origin slow heart rate.

ICD-10-CM R00.1 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):

308 Cardiac arrhythmia and conduction disorders with mcc
309 Cardiac arrhythmia and conduction disorders with cc
310 Cardiac arrhythmia and conduction disorders without cc/mcc

Convert R00.1 to ICD-9-CM

Code History

2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
2017 (effective 10/1/2016): No change
2018 (effective 10/1/2017): No change
2019 (effective 10/1/2018): No change
2020 (effective 10/1/2019): No change
2021 (effective 10/1/2020): No change
2022 (effective 10/1/2021): No change
2023 (effective 10/1/2022): No change

Code annotations containing back-references to R00.1:

Type 1 Excludes: I49
, I49
, I49

ICD-10-CM Diagnosis Code I49
Other cardiac arrhythmias
Code First
- cardiac arrhythmia complicating:
- abortion or ectopic or molar pregnancy (O00-O07, O08.8)
- obstetric surgery and procedures (O75.4)
Type 1 Excludes
- neonatal dysrhythmia (P29.1-)
- sinoatrial bradycardia (R00.1)
- sinus bradycardia (R00.1)
- vagal bradycardia (R00.1)
Type 2 Excludes
- bradycardia NOS (R00.1)
ICD-10-CM Diagnosis Code I49
Other cardiac arrhythmias
Code First
- cardiac arrhythmia complicating:
- abortion or ectopic or molar pregnancy (O00-O07, O08.8)
- obstetric surgery and procedures (O75.4)
Type 1 Excludes
- neonatal dysrhythmia (P29.1-)
- sinoatrial bradycardia (R00.1)
- sinus bradycardia (R00.1)
- vagal bradycardia (R00.1)
Type 2 Excludes
- bradycardia NOS (R00.1)
ICD-10-CM Diagnosis Code I49
Other cardiac arrhythmias
Code First
- cardiac arrhythmia complicating:
- abortion or ectopic or molar pregnancy (O00-O07, O08.8)
- obstetric surgery and procedures (O75.4)
Type 1 Excludes
- neonatal dysrhythmia (P29.1-)
- sinoatrial bradycardia (R00.1)
- sinus bradycardia (R00.1)
- vagal bradycardia (R00.1)
Type 2 Excludes
- bradycardia NOS (R00.1)
Type 2 Excludes: I49

ICD-10-CM Diagnosis Code I49
Other cardiac arrhythmias
Code First
- cardiac arrhythmia complicating:
- abortion or ectopic or molar pregnancy (O00-O07, O08.8)
- obstetric surgery and procedures (O75.4)
Type 1 Excludes
- neonatal dysrhythmia (P29.1-)
- sinoatrial bradycardia (R00.1)
- sinus bradycardia (R00.1)
- vagal bradycardia (R00.1)
Type 2 Excludes
- bradycardia NOS (R00.1)

Diagnosis Index entries containing back-references to R00.1:

Brachycardia R00.1
Bradycardia (sinoatrial) (sinus) (vagal) R00.1
Heart beat
- slow R00.1
Sinus - see also Fistula
- bradycardia R00.1
Slow
- heart R00.1 (beat)
Syncope (near) (pre-) R55
ICD-10-CM Diagnosis Code R55
Syncope and collapse
Applicable To
Blackout
Fainting
Vasovagal attack
Type 1 Excludes
cardiogenic shock (R57.0)
carotid sinus syncope (G90.01)
heat syncope (T67.1)
neurocirculatory asthenia (F45.8)
neurogenic orthostatic hypotension (G90.3)
orthostatic hypotension (I95.1)
postprocedural shock (T81.1-)
psychogenic syncope (F48.8)
shock NOS (R57.9)
shock complicating or following abortion or ectopic or molar pregnancy (O00-O07, O08.3)
shock complicating or following labor and delivery (O75.1)
Stokes-Adams attack (I45.9)
unconsciousness NOS (R40.2-)
- bradycardia R00.1

ICD-10-CM Codes Adjacent To R00.1

Q98.8 Other specified sex chromosome abnormalities, male phenotype

Q98.9 Sex chromosome abnormality, male phenotype, unspecified

Q99 Other chromosome abnormalities, not elsewhere classified

Q99.0 Chimera 46, XX/46, XY

Q99.1 46, XX true hermaphrodite

Q99.2 Fragile X chromosome

Q99.8 Other specified chromosome abnormalities

Q99.9 Chromosomal abnormality, unspecified

R00 Abnormalities of heart beat

R00.0 Tachycardia, unspecified

R00.1 Bradycardia, unspecified

R00.2 Palpitations

R00.8 Other abnormalities of heart beat

R00.9 Unspecified abnormalities of heart beat

R01 Cardiac murmurs and other cardiac sounds

R01.0 Benign and innocent cardiac murmurs

R01.1 Cardiac murmur, unspecified

R01.2 Other cardiac sounds

R03 Abnormal blood-pressure reading, without diagnosis

R03.0 Elevated blood-pressure reading, without diagnosis of hypertension

R03.1 Nonspecific low blood-pressure reading

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

2023 ICD-10-CM Diagnosis Code R00.1

Bradycardia, unspecified

Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances

Neonatal bradycardia

Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified

Abnormalities of heart beat

Other cardiac arrhythmias

Other cardiac arrhythmias

Other cardiac arrhythmias

Other cardiac arrhythmias

Syncope and collapse