A50.31 - Late congenital syphilitic interstitial keratitis

Version 2023

ICD-10:	A50.31
Short Description:	Late congenital syphilitic interstitial keratitis
Long Description:	Late congenital syphilitic interstitial keratitis
Status:	Valid for Submission
Version:	ICD-10-CM 2023
Code Classification:	Certain infectious and parasitic diseases (A00–B99) Infections with a predominantly sexual mode of transmission (A50-A64) Congenital syphilis (A50)

1. Approximate Synonyms
2. Tabular List of Diseases and Injuries
3. Index to Diseases and Injuries References
4. Diagnostic Related Groups - MS-DRG Mapping
5. Convert to ICD-9 Code
6. Patient Education
7. Related Codes Browser
8. Code History

A50.31 is a billable ICD-10 code used to specify a medical diagnosis of late congenital syphilitic interstitial keratitis. The code is valid during the fiscal year 2023 from October 01, 2022 through September 30, 2023 for the submission of HIPAA-covered transactions.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

Interstitial keratitis due to late congenital syphilis
Keratitis due to syphilis
Syphilitic interstitial keratitis

Index to Diseases and Injuries References

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for this diagnosis code are found in the injuries and diseases index:

- Keratitis (nodular) (nonulcerative) (simple) (zonular) - H16.9
- - in (due to)
  - - syphilis - A50.31
- - interstitial (nonsyphilitic) - H16.30
  - - syphilitic (congenital) (late) - A50.31
- - punctata
  - - syphilitic (profunda) - A50.31
- - syphilitic (congenital) (prenatal) - A50.31

- Syphilis, syphilitic (acquired) - A53.9
- - congenital - A50.9
  - - interstitial keratitis - A50.31
  - - late, or 2 years or more after birth NEC - A50.7
    - - interstitial keratitis - A50.31
- - keratitis (congenital) (interstitial) (late) - A50.31

Diagnostic Related Groups - MS-DRG Mapping

The is diagnosis code is grouped in the following groups for version MS-DRG V40.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC). applicable from 10/01/2022 through 09/30/2023.

MS-DRG	MS-DRG Title	MCD	Relative Weight
124	OTHER DISORDERS OF THE EYE WITH MCC	02	1.4007
125	OTHER DISORDERS OF THE EYE WITHOUT MCC	02	0.8621

The relative weight of a diagnostic related group determines the reimbursement rate based on the severity of a patient's illness and the associated cost of care during hospitalization.

Convert to ICD-9 Code

Source ICD-10 Code		Target ICD-9 Code
A50.31		090.3 - Syphilitic keratitis
Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Patient Education

Corneal Disorders

Your cornea is the outermost layer of your eye. It is clear and shaped like a dome. The cornea helps to shield the rest of the eye from germs, dust, and other harmful matter. It also helps your eye to focus. If you wear contact lenses, they float on top of your corneas.

Problems with the cornea include:

Refractive errors
Allergies
Infections
Injuries
Dystrophies - conditions in which parts of the cornea lose clarity due to a buildup of cloudy material

Treatments of corneal disorders include medicines, corneal transplantation, and corneal laser surgery.

NIH: National Eye Institute

[Learn More in MedlinePlus]

Syphilis

Syphilis is a sexually transmitted disease caused by bacteria. It infects the genital area, lips, mouth, or anus of both men and women. You usually get syphilis from sexual contact with someone who has it. It can also pass from mother to baby during pregnancy.

The early stage of syphilis usually causes a single, small, painless sore. Sometimes it causes swelling in nearby lymph nodes. If you do not treat it, syphilis usually causes a non-itchy skin rash, often on your hands and feet. Many people do not notice symptoms for years. Symptoms can go away and come back.

The sores caused by syphilis make it easier to get or give someone HIV during sex. If you are pregnant, syphilis can cause complications, or you could lose your baby. In rare cases, syphilis causes serious health problems and even death.

Syphilis is easy to cure with antibiotics if you catch it early. Correct usage of latex condoms greatly reduces, but does not completely eliminate, the risk of catching or spreading syphilis. If your or your partner is allergic to latex, you can use polyurethane condoms. The most reliable way to avoid infection is to not have anal, vaginal, or oral sex.

Centers for Disease Control and Prevention

[Learn More in MedlinePlus]

Related Codes Browser

ICD Code	Description	Valid for Submission
A50	Congenital syphilis	NON-BILLABLE CODE
A50.0	Early congenital syphilis, symptomatic	NON-BILLABLE CODE
A50.01	Early congenital syphilitic oculopathy	BILLABLE CODE
A50.02	Early congenital syphilitic osteochondropathy	BILLABLE CODE
A50.03	Early congenital syphilitic pharyngitis	BILLABLE CODE
A50.04	Early congenital syphilitic pneumonia	BILLABLE CODE
A50.05	Early congenital syphilitic rhinitis	BILLABLE CODE
A50.06	Early cutaneous congenital syphilis	BILLABLE CODE
A50.07	Early mucocutaneous congenital syphilis	BILLABLE CODE
A50.08	Early visceral congenital syphilis	BILLABLE CODE
A50.09	Other early congenital syphilis, symptomatic	BILLABLE CODE
A50.1	Early congenital syphilis, latent	BILLABLE CODE
A50.2	Early congenital syphilis, unspecified	BILLABLE CODE
A50.3	Late congenital syphilitic oculopathy	NON-BILLABLE CODE
A50.30	Late congenital syphilitic oculopathy, unspecified	BILLABLE CODE
A50.32	Late congenital syphilitic chorioretinitis	BILLABLE CODE
A50.39	Other late congenital syphilitic oculopathy	BILLABLE CODE
A50.4	Late congenital neurosyphilis [juvenile neurosyphilis]	NON-BILLABLE CODE
A50.40	Late congenital neurosyphilis, unspecified	BILLABLE CODE
A50.41	Late congenital syphilitic meningitis	BILLABLE CODE
A50.42	Late congenital syphilitic encephalitis	BILLABLE CODE
A50.43	Late congenital syphilitic polyneuropathy	BILLABLE CODE
A50.44	Late congenital syphilitic optic nerve atrophy	BILLABLE CODE
A50.45	Juvenile general paresis	BILLABLE CODE
A50.49	Other late congenital neurosyphilis	BILLABLE CODE
A50.5	Other late congenital syphilis, symptomatic	NON-BILLABLE CODE
A50.51	Clutton's joints	BILLABLE CODE
A50.52	Hutchinson's teeth	BILLABLE CODE
A50.53	Hutchinson's triad	BILLABLE CODE
A50.54	Late congenital cardiovascular syphilis	BILLABLE CODE
A50.55	Late congenital syphilitic arthropathy	BILLABLE CODE
A50.56	Late congenital syphilitic osteochondropathy	BILLABLE CODE
A50.57	Syphilitic saddle nose	BILLABLE CODE
A50.59	Other late congenital syphilis, symptomatic	BILLABLE CODE
A50.6	Late congenital syphilis, latent	BILLABLE CODE
A50.7	Late congenital syphilis, unspecified	BILLABLE CODE
A50.9	Congenital syphilis, unspecified	BILLABLE CODE

Code History

FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)

Previous Code: A50.30

Parent Code: A50.3

Next Code: A50.32

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