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ICD-10-CM 2027 diagnosis code

E70.320Tyrosinase negative oculocutaneous albinism

✓ Billable / specificCC — complication/comorbidity

E70.320 is a valid, billable ICD-10-CM code for tyrosinase negative oculocutaneous albinism. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About E70.320

E70.320 is the ICD-10-CM diagnosis code for Tyrosinase negative oculocutaneous albinism. It belongs to category E70 (disorders of aromatic amino-acid metabolism), block E70-E88 (metabolic disorders) and chapter 4 (endocrine, nutritional and metabolic diseases). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within E70.32 (oculocutaneous albinism), E70.320 is specifically for Tyrosinase negative oculocutaneous albinism. Related codes cover Tyrosinase positive oculocutaneous albinism (E70.321), other oculocutaneous albinism (E70.328) and unspecified (E70.329).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 642 (Inborn and Other Disorders of Metabolism, relative weight 1.3219), in MDC 10 (Endocrine, Nutritional and Metabolic Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 270.2 (other disturbances of aromatic amino-acid metabolism).

Coding notes

Applicable toConditions and synonyms classified to this code
  • Albinism I
  • Oculocutaneous albinism ty-neg

Notes that apply from higher levels

Instructions written at a parent level also apply to E70.320.

› From E70.32 Oculocutaneous albinism
Excludes1

Broader instructions also apply from E70-E88 Metabolic disorders and Chapter 4: Endocrine, nutritional and metabolic diseases.

Alphabetic index entries

2 entries

Terms in the official ICD-10-CM index that lead to E70.320.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

MDC 10 · Endocrine, Nutritional and Metabolic Diseases and Disorders

ICD-9-CM equivalent

Converter →
  • 270.2Other disturbances of aromatic amino-acid metabolismapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about E70.320

Is E70.320 billable?

Yes. E70.320 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can E70.320 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict E70.320 as a principal diagnosis.

Is E70.320 a CC or MCC?

E70.320 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does E70.320 group to?

E70.320 is used in the MS-DRG v44.0 logic for MS-DRG 642 (Inborn and Other Disorders of Metabolism). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for E70.320?

The CMS General Equivalence Mappings map E70.320 to ICD-9-CM 270.2.