ICD-10-CM Code Search

What Is ICD-10?

ICD-10 stands for International Statistical Classification of Diseases and Related Health Problems - 10th Revision and is a coding of diseases and signs, symptoms, abnormal findings, complaints, social circumstances and external causes of injury or diseases, as classified by the World Health Organization. ICD-10 is used by many countries primarily for reporting epidemiological data.

WHO has a detailed history of ICD-10 for those interested (PDF document).

What Is The ICD-10 Clinical Modification/Procedure Coding System (ICD-10-CM/PCS)?

ICD-10-CM/PCS is a diagnosis classification system developed by the Centers for Medicare and Medicaid Services (CMS) and the National Center for Health Statistics (NCHS), for coding and reporting in the healthcare environment of the United States. It consists of two parts:
  1. ICD-10-CM was developed by the Centers for Disease Control and Prevention for use in all United States of America health care treatment settings.
  2. ICD-10-PCS was developed by CMS for use in the U.S. for inpatient hospital settings ONLY.
While it was developed from ICD-10, ICD-10-CM/PCS is a modification that focuses on diagnoses and reason for visits in all American health care settings. ICD-10-CM/PCS is a morbidity classification, while ICD-10 is more of a mortality classification system.

What Are Some Differences Between ICD-9-CM and ICD-10-CM?

First of all, there is a difference in the number of codes available. As of February 2010, ICD-9-CM had a total of 14,315 distinct diagnostic codes, while ICD-10-CM had 69,101 codes. This is obviously a huge expansion and it allows for a lot more specificity and detail, reflecting the advances in clinical medicine over the last several decades.

Second, there are structural differences between the two coding systems. Please see the table below for more details.

ICD-9-CM ICD-10-CM
ICD-9 code structure ICD-9 code structure
3-5 digits 3-7 digits
1st digit is numeric (chapters 1-17) or alpha (E or V) (supplemental chapters) 1st digit is alpha (all letters except U)
2nd, 3rd, 4th and 5th digits are numeric 2nd and 3rd digits are numeric; 4th, 5th, 6th and 7th digits can be alpha or numeric
Decimal after first 3 characters Decimal after first 3 characters
Some Examples
780.60 - Fever, unspecified
995.81 - Adult physical abuse
810.00 - Closed fracture of clavicle, unspecified part
R50.9 - Fever, unspecified
O9A.311 - Physical abuse complicating pregnancy, first trimester
S42.001A - Fracture of unspecified part of right clavicle, initial encounter for closed fracture

What Are Some Differences Between ICD-9-PCS and ICD-10-CM-PCS

As of February 2010, ICD-9-PCS had a total of 3,838 procedure codes, while ICD-10-PCS had 71,957 codes. In addition, just ICD-10-PCS codes are structurally different from ICD-9-PCS codes in some significant ways. Please see the table below fro details.

ICD-9-PCS ICD-10-PCS
3-4 digits 7 digits
all digits are numeric digits can be either alpha or numeric. Letters O and I are not used to avoid confusion with the numbers 0 and 1.
2nd, 3rd, 4th and 5th digits are numeric 2nd and 3rd digits are numeric; 4th, 5th, 6th and 7th digits can be alpha or numeric
Decimal after first 3 characters Decimal after first 3 characters
Some Examples
43.5 - Partial gastrectomy with anastomosis to esophagus
44.42 - Suture of duodenal ulcer site.
0FB03ZX - Excision of Liver, Percutaneous Approach, Diagnostic
0DQ10ZZ - Repair upper esophagus, open approach


Important Note: ICD-10-CM/PCS will not affect physicians, outpatient facilities, and hospital outpatient departments' usage of Current Procedural Terminology (CPT) codes on Medicare FFS claims. CPT use will continue.

How To Translate ICD-9 Codes Into ICD-10 Codes?

Given the significant expansion and details in ICD-10 codes, it is not always possible to find a unique ICD-10 code to match exactly an ICD-9 code. In about 20% of cases, there are multiple ICD-10 codes for one ICD-9 code, or multiple ICD-9 codes for one ICD-10 code, or there is simply no exact match between the two systems.

Please check CMS's General Equivalence Mappings documents for more details. You can also use our ICD-9 to ICD-10 bidirectional conversion tool.

Additional Information About ICD-10

What Is ICD-10?

ICD-10 stands for International Statistical Classification of Diseases and Related Health Problems - 10th Revision and is a coding of diseases and signs, symptoms, abnormal findings, complaints, social circumstances and external causes of injury or diseases, as classified by the World Health Organization. ICD-10 is used by many countries primarily for reporting epidemiological data.

WHO has a detailed history of ICD-10 for those interested (PDF document).

What Is The ICD-10 Clinical Modification/Procedure Coding System (ICD-10-CM/PCS)?

ICD-10-CM/PCS is a diagnosis classification system developed by the Centers for Medicare and Medicaid Services (CMS) and the National Center for Health Statistics (NCHS), for coding and reporting in the healthcare environment of the United States. It consists of two parts:
  1. ICD-10-CM was developed by the Centers for Disease Control and Prevention for use in all United States of America health care treatment settings.
  2. ICD-10-PCS was developed by CMS for use in the U.S. for inpatient hospital settings ONLY.
While it was developed from ICD-10, ICD-10-CM/PCS is a modification that focuses on diagnoses and reason for visits in all American health care settings. ICD-10-CM/PCS is a morbidity classification, while ICD-10 is more of a mortality classification system.

What Are Some Differences Between ICD-9-CM and ICD-10-CM?

First of all, there is a difference in the number of codes available. As of February 2010, ICD-9-CM had a total of 14,315 distinct diagnostic codes, while ICD-10-CM had 69,101 codes. This is obviously a huge expansion and it allows for a lot more specificity and detail, reflecting the advances in clinical medicine over the last several decades.

Second, there are structural differences between the two coding systems. Please see the table below for more details.

ICD-9-CM ICD-10-CM
ICD-9 code structure ICD-9 code structure
3-5 digits 3-7 digits
1st digit is numeric (chapters 1-17) or alpha (E or V) (supplemental chapters) 1st digit is alpha (all letters except U)
2nd, 3rd, 4th and 5th digits are numeric 2nd and 3rd digits are numeric; 4th, 5th, 6th and 7th digits can be alpha or numeric
Decimal after first 3 characters Decimal after first 3 characters
Some Examples
780.60 - Fever, unspecified
995.81 - Adult physical abuse
810.00 - Closed fracture of clavicle, unspecified part
R50.9 - Fever, unspecified
O9A.311 - Physical abuse complicating pregnancy, first trimester
S42.001A - Fracture of unspecified part of right clavicle, initial encounter for closed fracture

What Are Some Differences Between ICD-9-PCS and ICD-10-CM-PCS

As of February 2010, ICD-9-PCS had a total of 3,838 procedure codes, while ICD-10-PCS had 71,957 codes. In addition, just ICD-10-PCS codes are structurally different from ICD-9-PCS codes in some significant ways. Please see the table below fro details.

ICD-9-PCS ICD-10-PCS
3-4 digits 7 digits
all digits are numeric digits can be either alpha or numeric. Letters O and I are not used to avoid confusion with the numbers 0 and 1.
2nd, 3rd, 4th and 5th digits are numeric 2nd and 3rd digits are numeric; 4th, 5th, 6th and 7th digits can be alpha or numeric
Decimal after first 3 characters Decimal after first 3 characters
Some Examples
43.5 - Partial gastrectomy with anastomosis to esophagus
44.42 - Suture of duodenal ulcer site.
0FB03ZX - Excision of Liver, Percutaneous Approach, Diagnostic
0DQ10ZZ - Repair upper esophagus, open approach


Important Note: ICD-10-CM/PCS will not affect physicians, outpatient facilities, and hospital outpatient departments' usage of Current Procedural Terminology (CPT) codes on Medicare FFS claims. CPT use will continue.

How To Translate ICD-9 Codes Into ICD-10 Codes?

Given the significant expansion and details in ICD-10 codes, it is not always possible to find a unique ICD-10 code to match exactly an ICD-9 code. In about 20% of cases, there are multiple ICD-10 codes for one ICD-9 code, or multiple ICD-9 codes for one ICD-10 code, or there is simply no exact match between the two systems.

Please check CMS's General Equivalence Mappings documents for more details. You can also use our ICD-9 to ICD-10 bidirectional conversion tool.

Additional Information About ICD-10