ICD-10 I10
Billable / SpecificEssential (primary) hypertension
About ICD-10-CM I10
ICD-10-CM code I10 represents Essential (primary) hypertension. This is a billable/specific code in the Circulatory System chapter (block I10). The 2026 edition of ICD-10-CM I10 became effective on October 1, 2025.
Coding Tips for I10
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
Essential hypertension. Use I11.x or I12.x or I13.x if hypertensive heart disease, hypertensive CKD, or both are documented. The combination codes are frequently missed.
Type 1 Excludes
Pure excludes, these codes can never be coded together with I10. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- hypertensive disease complicating pregnancy, childbirth and the puerperium (O10-O11, O13-O16)
Type 2 Excludes
Not included here, the excluded code is not part of I10, but a patient may have both conditions at the same time. Both codes may be coded together when applicable.
- essential (primary) hypertension involving vessels of brain (I60-I69)
- essential (primary) hypertension involving vessels of eye (H35.0-)
Includes
- high blood pressure
- hypertension (arterial) (benign) (essential) (malignant) (primary) (systemic)
Medicare LCD Coverage for I10
Local Coverage Determinations (LCDs) from CMS MACs that list I10 as a covered diagnosis.
Showing top 10 of 672 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing I10.
3 Aetna
5 Cigna
5 Medicare
CPT Codes Commonly Billed with I10
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 99215 Complex chronic disease management Internal Medicine
- 99490 Chronic Care Management — 2+ chronic conditions required Internal Medicine
- 99213 Office visit for hypertension management Internal Medicine
- 99214 Office visit for hypertension management Family Medicine
- 99215 Office visit for hypertension management Internal Medicine
- 99203 New patient office visit — common complaints plus chronic conditions: HTN, diabetes, hyperlipidemia, asthma, GERD, back pain, migraine, tachycardia, prediabetes Primary Care
- 99204 New patient office visit — multiple chronic conditions: HTN, T2DM, hyperlipidemia, asthma, anxiety, depression, obesity, IBS, COPD, thyroid, anemia, CAD, sleep apnea, psoriasis, RA Primary Care
- 99205 New patient office visit — complex/high-risk: uncontrolled diabetes, heart failure, COPD exacerbation, cancer, MS, RA, CKD, CAD, recurrent depression, epilepsy, lupus, syncope, cognitive decline Primary Care
- 99211 Established patient minimal visit — BP check, medication refill, nurse visit, immunization admin, post-op follow-up, injury follow-up Primary Care
- 99213 Established patient — HTN follow-up, diabetes management, hyperlipidemia, asthma, anxiety, common complaints, back pain, GERD, migraine, acne, joint pain, prediabetes, obesity, anemia, hypothyroid, fatigue Primary Care
Convert I10 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| I10 | 4010 | 10000 |
| I10 | 4011 | 10000 |
| I10 | 4019 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To I10
Other codes in section I10-I1A (Hypertensive diseases).
ICD-10 I10, Billing FAQ
Is ICD-10 code I10 billable? +
Yes, I10 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What codes are Type 1 Excludes for I10? +
Type 1 Excludes (never code together with I10): hypertensive disease complicating pregnancy, childbirth and the puerperium (O10-O11, O13-O16)
What codes are Type 2 Excludes for I10? +
Type 2 Excludes (may be coded together when both conditions exist): essential (primary) hypertension involving vessels of brain (I60-I69); essential (primary) hypertension involving vessels of eye (H35.0-)
What CPT codes are commonly billed with I10? +
Procedures frequently paired with I10 include: 99215, 99490, 99213, 99214, 99215.
What ICD-9 codes does I10 map to? +
Per CMS GEMs, I10 maps to ICD-9 codes: 4010, 4011, 4019. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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