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Primary Diagnosis Categories

Each hospitalization record in the Hospital Discharge query may contain up to 13 diagnoses. Primary diagnosis refers to the first-listed (main) diagnosis.

ICD-9 Chapter

ICD-10 Chapter

Primary Diagnosis Categories

ICD-9-CM Codes (2008-2015)

ICD-10-CM Codes (2016+)

1

1

Certain infectious and parasitic diseases

001-139

A00-B99

2

2

Neoplasms

140-239

C00-D49

3

Endocrine, nutritional, and metabolic diseases, and immunity disorders

240-279

---

4

Diseases of the blood and blood-forming organs

280-289

---

3

Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism

---

D50-D89

4

Endocrine, nutritional, and metabolic diseases

---

E00-E90

5

5

Mental and behavioral disorders

290-319

F00-F99

6

Diseases of the nervous system and sense organs

320-389

---

6

Diseases of the nervous system

---

G00-G99

7

Diseases of the eye and adnexa

---

H00-H59

8

Diseases of the ear and mastoid process

---

H60-H95

7

9

Diseases of the circulatory system

390-459

I00-I99

8

10

Diseases of the respiratory system

460-519

J00-J99

9

11

Diseases of the digestive system

520-579

K00-K95

12

12

Diseases of the skin and subcutaneous tissue

680-709

L00-L99

13

13

Diseases of the musculoskeletal system and connective tissue

710-739

M00-M99

10

14

Diseases of the genitourinary system

580-629

N00-N99

11

15

Pregnancy, childbirth, and puerperium

630-677

O00-O9A

15

16

Certain conditions originating in the perinatal period

760-779

P00-P99

14

17

Congenital malformations, deformations, and chromosomal abnormalities

740-759

Q00-Q99

16

18

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

780-799

R00-R99

17

19

Injury, poisoning, and certain other consequences of external causes*

800-999

S00-T98

18

21

Factors influencing health status and contact with health services

V01-V84

Z00-Z99

22

Codes for special purposes

---

U00-U99

19

23

Ungroupable

---

---



*The injury and poisoning codes given here and used in the Primary Diagnosis Categories of the Inpatient Hospital Discharge query are Nature of Injury, not External Cause of Injury (E800-E999/V01-Y98), codes. An example of nature of injury would be fracture of femur ("broken hip") or contusion of elbow (bruised elbow). The nature of injury is what happened to the person's body. The corresponding external cause of injury might be fall from a ladder or motor vehicle collision. The external cause of injury is how the injury happened.

For more information on ICD-9-CM codes: https://icd.codes/icd9cm
For more information about ICD-10-CM codes: https://www.cdc.gov/nchs/icd/icd10cm.htm
The information provided above is from the Department of Health's NJSHAD web site (https://nj.gov/health/shad). The information published on this website may be reproduced without permission. Please use the following citation: " Retrieved Sat, 21 July 2018 0:07:44 from Department of Health, New Jersey State Health Assessment Data Web site: https://nj.gov/health/shad ".

Content updated: Wed, 23 May 2018 05:01:08 EDT