Z05.73 Observation and evaluation of newborn for suspected connective tissue condition ruled out

Billable ICD-10-CM code, FY2026. Exempt from present-on-admission (POA) reporting.

Applies from Z05 Encounter for observation and evaluation of newborn for suspected diseases and conditions ruled out

Applicable to

• This category is to be used for newborns, within the neonatal period (the first 28 days of life), who are suspected of having an abnormal condition, but without signs or symptoms, and which, after examination and observation, is ruled out.

MS-DRG index

Defines the logic of DRG(s) 795 in MDC 15.

Approximate ICD-9-CM (GEMs)

• V29.8 Observation for other specified suspected conditions (approximate)

Medicare Code Edits (MCE v43.1 (April 2026))

• Perinatal/Newborn diagnoses: Age conflict edit. These diagnoses occur only during the perinatal or newborn period, so the Medicare Code Editor flags them on any record where the patient is not age 0.

Code annotations containing back-references to Z05.73

Back-references to Z05

• Type 2 Excludes: P00 Newborn affected by maternal conditions that may be unrelated to present pregnancy ("encounter for observation of newborn for suspected diseases and conditions ruled out (Z05.-)")
• Type 2 Excludes: P01 Newborn affected by maternal complications of pregnancy ("encounter for observation of newborn for suspected diseases and conditions ruled out (Z05.-)")
• Type 2 Excludes: P02 Newborn affected by complications of placenta, cord and membranes ("encounter for observation of newborn for suspected diseases and conditions ruled out (Z05.-)")
• Type 2 Excludes: P03 Newborn affected by other complications of labor and delivery ("encounter for observation of newborn for suspected diseases and conditions ruled out (Z05.-)")
• Type 2 Excludes: P04 Newborn affected by noxious substances transmitted via placenta or breast milk ("encounter for observation of newborn for suspected diseases and conditions ruled out (Z05.-)")
• Type 1 Excludes: Z03 Encounter for medical observation for suspected diseases and conditions ruled out ("encounter for observation and evaluation of newborn for suspected diseases and conditions ruled out (Z05.-)")

Diagnosis Index entries for Z05.73

• Observation (following) (for) (without need for further medical care) › newborn (for) › suspected condition, related to exposure from the mother or birth process › ruled out › connective tissue

Nearby codes

• Z05.5 Observation and evaluation of newborn for suspected gastrointestinal condition ruled out
• Z05.6 Observation and evaluation of newborn for suspected genitourinary condition ruled out
• Z05.7 Observation and evaluation of newborn for suspected skin, subcutaneous, musculoskeletal and connective tissue condition ruled out
• Z05.71 Observation and evaluation of newborn for suspected skin and subcutaneous tissue condition ruled out
• Z05.72 Observation and evaluation of newborn for suspected musculoskeletal condition ruled out
• Z05.73 Observation and evaluation of newborn for suspected connective tissue condition ruled out (this code)
• Z05.8 Observation and evaluation of newborn for other specified suspected condition ruled out
• Z05.81 Observation and evaluation of newborn for suspected condition related to home physiologic monitoring device ruled out
• Z05.89 Observation and evaluation of newborn for other specified suspected condition ruled out
• Z05.9 Observation and evaluation of newborn for unspecified suspected condition ruled out