ICD-10-CM codes for Type 2 diabetes

Index to Diseases entry: type 2

Each row is a subterm under the entry. Indented rows refine the row above; “see” sends you to another entry. Look the code up in the tabular list before reporting it: the tabular notes can require a more specific or an additional code.

Tabular list notes for E11.9

Excludes1 (never coded together)

• type 2 diabetes mellitus, without complications in remission (E11.A)

How to read an Index to Diseases entry

• Words in parentheses after a term are nonessential modifiers: they may or may not appear in the record, and they do not change the code.
• Indented subterms are essential modifiers. Each one describes a different site, type or cause, and when the record supports it, the subterm's code replaces the default code.
• “With” and “in” link two conditions. The Official Guidelines presume a causal relationship between conditions linked by “with” in the index unless the provider documents that they are unrelated.
• “See” sends you to another entry that holds the code; “see also” points to another entry that may be useful.
• A code that ends in a dash, such as I50.-, is incomplete: the tabular list gives the characters it still needs.
• Never report a code from the index alone. Find it in the tabular list and apply its includes, excludes, code first, use additional code and 7th-character instructions before you report it.

Once the code is settled, check what it does for payment: the HCC lookup for risk adjustment, the CC/MCC exclusion check for inpatient severity, and the LCD code lookup for local coverage of the service it supports. The guide to ICD-10 diagnosis codes explains the code structure.

Codes for other common conditions

• Hypertension
• Headache
• Shortness of breath
• Hyperlipidemia
• Cough
• Urinary tract infection (UTI)
• Gastroesophageal reflux disease (GERD)
• Hypothyroidism
• Abdominal pain
• Atrial fibrillation
• Coronary artery disease (CAD)
• Attention-deficit hyperactivity disorder (ADHD)
• Depression
• Obesity
• Anxiety
• Chronic obstructive pulmonary disease (COPD)
• Asthma
• Hypokalemia
• Insomnia
• Fatigue
• Vitamin D deficiency
• Dizziness
• Congestive heart failure (CHF)
• Pneumonia
• Prediabetes
• All ICD-10-CM chapters

Frequently asked questions

Sources

Every figure on this page is taken from the CMS publications below, as released by the Centers for Medicare & Medicaid Services. Projection built 2026-10-10. Verify against the primary file before billing or contracting decisions. The reference methodology explains how each figure is computed from these files.

• ICD-10-CM FY2027 tabular order file (category titles)
  Version FY2027 · effective 2026-10-01 · file icd10cm_order_2027.txtSHA-256 38981fb2c1226e2b…
• ICD-10-CM FY2027 tabular list (chapter titles and ranges)
  Version FY2027 · effective 2026-10-01 · file 2027-code-tables-tabular-index.zipSHA-256 37baa476323714be…
• ICD-10-CM FY2027 code descriptions addenda (codes added, deleted and revised)
  Version FY2027 · effective 2026-10-01 · file icd10cm_codes_addenda_2027.txtSHA-256 cfba025073235af4…