ICD-10-CM › S00-T88 › T66-T78 › T78.4 Other and unspecified allergy › T78.49
Other allergy
Not billableICD-10-CM diagnosis code.
This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.
Submit one of these 3 more specific codes instead:
- T78.49XA Other allergy, initial encounter
- T78.49XD Other allergy, subsequent encounter
- T78.49XS Other allergy, sequela
This code requires a seventh character. See the rule below.
What has happened to this code
Every change the publisher made, from 2014 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.
- FY2014 Added to the draft code set draft Other allergy
Official coding rules
Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.
Inherited from T78 Adverse effects, not elsewhere classified
Seventh character required
- The appropriate 7th character is to be added to each code from category T78
Excludes2 - not included here
- complications of surgical and medical care NEC (T80-T88)
Inherited from the T66-T78 section Other and unspecified effects of external causes (T66-T78)
Code also
- , if applicable, place of occurrence, such as:
- highway rest stop (Y92.523)
- school (private) (public) (state) as the place of occurrence of the external cause (Y92.21-)
- service areas as the place of occurrence of the external cause (Y92.52-)
- single-family non-institutional (private) house as the place of occurrence of the external cause (Y92.01-)
- transport vehicle as the place of occurrence of the external cause (Y92.81-)
How CDC's index refers to this code
Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.
- Arthropyosis
- Pyoarthrosis
- Septic > joint
- Abscess > joint
- Disorder > allergic
- Hypersusceptibility
- Reaction > allergic
- Pyemia, pyemic > joint
- Sensitive, sensitivity
- Pyarthritis, pyarthrosis
- Arthritis, arthritic > septic
- Arthritis, arthritic > purulent
- Suppuration, suppurative > joint
- Arthritis, arthritic > suppurative
- Arthritis, arthritic > in > infection
- Disease, diseased > joint > suppurative
- Polyarthritis, polyarthropathy > infective
- Arthritis, arthritic > in > coliform bacilli
- Arthritis, arthritic > infectious or infective
- Hypersensitive, hypersensitiveness, hypersensitivity
- Allergy, allergic > specific NEC
- Arthritis, arthritic > in > hypersensitivity reaction NEC
Codes in the same group
| Code | Description | Status |
|---|---|---|
| T78.40 | Allergy, unspecified | Not billable |
| T78.41 | Arthus phenomenon | Not billable |