OB Series Part 3: Thorough Documentation necessary for coding deliveries

For every procedure that is performed, there needs to be documentation that supports why the service was needed, even for coding anesthesia for deliveries. It seems obvious why the patient is there; however, as with any service, it is essential to document the conditions unique to the patient who is delivering.  

Diagnosis codes for deliveries

Based on ICD-10 Guidelines, the expectation is that each delivery will have a minimum of three diagnosis codes assigned.

• The first code should be from Chapter 15: Pregnancy, Childbirth and the Puerperium to support the medical necessity for the service provided. (An “O” code, as all of the codes in Chapter 15 begin with the letter “O”)
• The second and third codes should be from Chapter 21: Factors Influencing Health Status and Contact with Health Services (“Z” codes)
  • Official ICD-10 Guideline Chapter 15.a.5 states: A code from category Z37, Outcome of delivery, should be included on every maternal record when a delivery has occurred.
  • The following guideline was updated on October 1, 2023, and can be located at the beginning of ICD-10 Chapter 15: Pregnancy, Childbirth, and the Puerperium (O00-O9A).  It now states: Use Additional code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.

Considering delivery outcomes

When coding vaginal deliveries, coders often default to ICD-10 code O80 Encounter for full-term uncomplicated delivery, based solely on the documentation of vaginal delivery as the procedure or plan (on a labor record without documentation of a delivery).

While this code offers a straightforward solution to diagnosis coding, O80 includes further clarity, “Delivery requiring minimal or no assistance, with or without episiotomy, without fetal manipulation [e.g., rotation version] or instrumentation [forceps] of a spontaneous, cephalic, vaginal, full-term, single, live-born infant. This code is for use as a single diagnosis code and is not to be used with any other code from chapter 15.” 

The directives around O80 further indicate that the only outcome of delivery permitted is Z37.0, assigned for single live birth.  

From a clinical standpoint, how many deliveries are truly uncomplicated?  Ensure documentation supports the encounter in the case of long labor, conversion to cesarean sections, and/or additional obstetric services.  

Coders are also often left to assume the delivery outcome due to documentation deficiencies. This, too, can lead to issues should the patient not deliver after laboring or if the delivery results in an adverse outcome.  When the outcome is unclear, coders must resort to an unspecified code. 

Final thoughts on coding anesthesia for deliveries

Lastly, consider accurately the weeks of gestation. While there is an understanding of the meaning when documentation states “full-term,” neither ICD-10 nor the American College of Obstetrics and Gynecology (ACOG) offers a single definition to support the term.  ACOG offers a range of gestations. Therefore, there is no code to reflect this term, and again, coders would be left to assume or report an unspecified code.   

ICD-10 codes are becoming increasingly scrutinized in the industry.  If you need clarification on whether your documentation allows for the appropriate capture of your obstetric services, reach out and let our team review.

We are here to help. Contact us with your questions or to request a review of your documentation.

For more on coding for labor and delivery, read OB Series Part 1 and OB Series Part 2.