2027 ICD-10-CM Diagnosis Code E89.0Postprocedural hypothyroidism
ICD-10-CM Codes›E00–E89›E89›E89
- Billable — Valid for Submission
- Not Chronic
E89.0 is a billable ICD-10-CM diagnosis code for postprocedural hypothyroidism. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 643 through 645. Coders also document this condition as acquired central hypothyroidism. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Postprocedural or postoperative endocrine or metabolic complication and Thyroid disorders.
E89.0 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 44 for payment year 2027.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
E89.0 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model, but it maps to payment categories in the other CMS models shown below.
Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acquired central hypothyroidism
- Acquired central hypothyroidism caused by ionizing radiation
- Central hypothyroidism
- Hypothyroidism caused by ionizing radiation
- Hypothyroidism due to and following radiotherapy
- Hypothyroidism following external beam radiation therapy
- Hypothyroidism following radioiodine therapy
- Postablative hypothyroidism
- Postoperative hypothyroidism
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to E89.0: its own notes plus those printed at E89 and Chapter 4. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Postirradiation hypothyroidism
- Postsurgical hypothyroidism
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
Notes
General instructions on how these codes are used.
- All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name E89.0, its category, or a range that includes it.
Excludes1 1
These codes carry an Excludes1 note naming E89.0: they are not reported together with it, unless the two conditions are unrelated.
- E03 Other hypothyroidismpostprocedural hypothyroidism (E89.0)
Excludes2 4
These codes carry an Excludes2 note naming E89.0: its condition is not part of those codes, and both may be reported when the patient has both.
- E36 Intraoperative complications of endocrine systempostprocedural endocrine and metabolic complications and disorders, not elsewhere classified (E89.-) names E89.-, which includes this code
- Block T80-T88 Complications of surgical and medical care, not elsewhere classifiedintraoperative and postprocedural complications of specified body systems (D78.-, E36.-, E89.-, G97.3-, G97.4, H59.3-, H59.-, H95.2-, H95.3, I97.4-, I97.5, J95.6-, J95.7, K91.6-, L76.-, M96.-, N99.-) names E89.-, which includes this code
- T81 Complications of procedures, not elsewhere classifiedintraoperative and postprocedural complications of specific body system (D78.-, E36.-, E89.-, G97.3-, G97.4, H59.3-, H59.-, H95.2-, H95.3, I97.4-, I97.5, J95, K91.-, L76.-, M96.-, N99.-) names E89.-, which includes this code
- Z90 Acquired absence of organs, not elsewhere classifiedpostprocedural absence of endocrine glands (E89.-) names E89.-, which includes this code
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Hypothyroidism (acquired) E03.9
irradiation therapy E89.0
surgery E89.0
postirradiation E89.0
postprocedural E89.0
postsurgical E89.0
Status (post) See Also: Presence (of);
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Hypothyroidism
Hypothyroidism, or underactive thyroid, happens when your thyroid gland doesn't make enough thyroid hormones to meet your body's needs.
The full article covers:
- What is hypothyroidism?
- What causes hypothyroidism?
- Who is at risk for hypothyroidism?
- What are the symptoms of hypothyroidism?
- What other problems can hypothyroidism cause?
- How is hypothyroidism diagnosed?
- What are the treatments for hypothyroidism?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert E89.0 to ICD-9-CMHistory
Code HistoryHistory
Questions About E89.0Overview
What is the ICD-10 code for postprocedural hypothyroidism?
The ICD-10-CM code for postprocedural hypothyroidism is E89.0 (sometimes written as E890). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is E89.0 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report postprocedural hypothyroidism on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does E89.0 group to?
When postprocedural hypothyroidism is the principal diagnosis on an inpatient stay, it groups to MS-DRG 644, 645, 643, with relative weights from 0.7461 to 1.6138 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of E89.0?
Under the General Equivalence Mappings, postprocedural hypothyroidism converts to ICD-9-CM 244.0 (postsurgical hypothyroid) and 244.1 (postablat hypothyr NEC). The mapping is approximate, so confirm the match fits the documentation.
Does E89.0 risk-adjust for Medicare Advantage payment?
Not for Medicare Advantage: E89.0 maps to no category in the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 44 (Thyroid Disorders).
