ICD-10-CM Codes
O00-O9A Pregnancy, childbirth and the puerperium
O10-O16 Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium
O10- Pre-existing hypertension complicating pregnancy, childbirth and the puerperium
2021 ICD-10-CM Diagnosis Code O10.01

2021 ICD-10-CM Diagnosis Code O10.01

Pre-existing essential hypertension complicating pregnancy,

2016

2017

2018

2019

2020

2021

Non-Billable/Non-Specific Code

O10.01 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
The 2021 edition of ICD-10-CM O10.01 became effective on October 1, 2020.
This is the American ICD-10-CM version of O10.01 - other international versions of ICD-10 O10.01 may differ.

The following code(s) above O10.01 contain annotation back-references

Annotation Back-References

In this context, annotation back-references refer to codes that contain:

Applicable To annotations, or
Code Also annotations, or
Code First annotations, or
Excludes1 annotations, or
Excludes2 annotations, or
Includes annotations, or
Note annotations, or
Use Additional annotations

that may be applicable to O10.01:

O00-O9A
2021 ICD-10-CM Range O00-O9A
Pregnancy, childbirth and the puerperium
Note
- CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS
- Codes from this chapter are for use for conditions related to or aggravated by the pregnancy, childbirth, or by the puerperium (maternal causes or obstetric causes)
- Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
- 1st trimester- less than 14 weeks 0 days
- 2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
- 3rd trimester- 28 weeks 0 days until delivery
Type 1 Excludes
- supervision of normal pregnancy (Z34.-)
Type 2 Excludes
- mental and behavioral disorders associated with the puerperium (F53.-)
- obstetrical tetanus (A34)
- postpartum necrosis of pituitary gland (E23.0)
- puerperal osteomalacia (M83.0)
Use Additional
- code from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
Pregnancy, childbirth and the puerperium
O10
ICD-10-CM Diagnosis Code O10
Pre-existing hypertension complicating pregnancy, childbirth and the puerperium
Includes
- pre-existing hypertension with pre-existing proteinuria complicating pregnancy, childbirth and the puerperium
Type 2 Excludes
- pre-existing hypertension with superimposed pre-eclampsia complicating pregnancy, childbirth and the puerperium (O11.-)
Pre-existing hypertension complicating pregnancy, childbirth and the puerperium
O10.0
ICD-10-CM Diagnosis Code O10.0
Pre-existing essential hypertension complicating pregnancy, childbirth and the puerperium
Applicable To
- Any condition in I10 specified as a reason for obstetric care during pregnancy, childbirth or the puerperium
Pre-existing essential hypertension complicating pregnancy, childbirth and the puerperium

Code History

2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
2017 (effective 10/1/2016): No change
2018 (effective 10/1/2017): No change
2019 (effective 10/1/2018): No change
2020 (effective 10/1/2019): No change
2021 (effective 10/1/2020): No change

Diagnosis Index entries containing back-references to O10.01:

Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic) I10
ICD-10-CM Diagnosis Code I10
Essential (primary) hypertension
Includes
high blood pressure
hypertension (arterial) (benign) (essential) (malignant) (primary) (systemic)
Type 1 Excludes
hypertensive disease complicating pregnancy, childbirth and the puerperium (O10-O11, O13-O16)
Type 2 Excludes
essential (primary) hypertension involving vessels of brain (I60-I69)
essential (primary) hypertension involving vessels of eye (H35.0-)
- complicating
  - pregnancy
    - pre-existing O10.91-
      ICD-10-CM Diagnosis Code O10.91-
      Unspecified pre-existing hypertension complicating pregnancy
      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
      - essential O10.01-

ICD-10-CM Codes Adjacent To O10.01

O09.892 …… second trimester

O09.893 …… third trimester

O09.899 …… unspecified trimester

O09.9 Supervision of high risk pregnancy, unspecified

O09.90 …… unspecified trimester

O09.91 …… first trimester

O09.92 …… second trimester

O09.93 …… third trimester

O10 Pre-existing hypertension complicating pregnancy, childbirth and the puerperium

O10.0 Pre-existing essential hypertension complicating pregnancy, childbirth and the puerperium

O10.01 Pre-existing essential hypertension complicating pregnancy,

O10.011 …… first trimester

O10.012 …… second trimester

O10.013 …… third trimester

O10.019 …… unspecified trimester

O10.02 Pre-existing essential hypertension complicating childbirth

O10.03 Pre-existing essential hypertension complicating the puerperium

O10.1 Pre-existing hypertensive heart disease complicating pregnancy, childbirth and the puerperium

O10.11 Pre-existing hypertensive heart disease complicating pregnancy

O10.111 …… first trimester

O10.112 …… second trimester

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

2021 ICD-10-CM Diagnosis Code O10.01

Pre-existing essential hypertension complicating pregnancy,

Pregnancy, childbirth and the puerperium

Pre-existing hypertension complicating pregnancy, childbirth and the puerperium

Pre-existing essential hypertension complicating pregnancy, childbirth and the puerperium

Essential (primary) hypertension

Unspecified pre-existing hypertension complicating pregnancy