ICD-9-CM Tabular Index · Legacy Code Set 661.00-661.93

661 Abnormality of forces of labor (661.00-661.93) ICD-9-CM

The 661.00-661.93 block classified 661 abnormality of forces of labor with 18 legacy diagnosis codes. None remain valid for claim submission; each code below links to its reference page with the official ICD-10-CM replacement under the CMS General Equivalence Mappings.

⚠ Legacy code set – replaced by ICD-10-CM on October 1, 2015✓ Built from the final CMS ICD-9-CM release
18
Legacy Codes
661.00-661.93
Code Range
2015
Retired October 1
ICD-10-CM
Replaced By

Retired Code Set

ICD-9-CM stopped being valid for U.S. claims with dates of service on or after October 1, 2015, when ICD-10-CM replaced it. Use this index for historical lookups and crosswalking; for current coding, start from the ICD-10-CM codes list or the ICD-9 / ICD-10 converter.

ICD-9-CM

Legacy Codes in the 661.00-661.93 Block 18 codes

None of these codes remain valid for claim submission. Each code page shows its ICD-10-CM replacement under the CMS General Equivalence Mappings.

18 of 18 shown
  • 661.00 Prim uterine inert-unsp
  • 661.01 Prim uterine inert-deliv
  • 661.03 Prim uter inert-antepart
  • 661.10 Sec uterine inert-unspec
  • 661.11 Sec uterine inert-deliv
  • 661.13 Sec uterine inert-antepa
  • 661.20 Uterine inertia NEC-unsp
  • 661.21 Uterine inert NEC-deliv
  • 661.23 Uterine inert NEC-antepa
  • 661.30 Precipitate labor-unspec
  • 661.31 Precipitate labor-deliv
  • 661.33 Precipitate labor-antepa
  • 661.40 Uter dystocia NOS-unspec
  • 661.41 Uter dystocia NOS-deliv
  • 661.43 Uter dystocia NOS-antepa
  • 661.90 Abnormal labor NOS-unsp
  • 661.91 Abnormal labor NOS-deliv
  • 661.93 Abnorm labor NOS-antepar

Questions About This Page

Are the 661.00-661.93 codes still billable?

No. Every code in this block became invalid for U.S. claims after September 30, 2015. Each code page linked above shows the ICD-10-CM replacement CMS assigned in the General Equivalence Mappings, and the ICD-9 / ICD-10 converter translates any of them directly.

What did the 661.00-661.93 block classify?

The block classified 661 abnormality of forces of labor with 18 codes in the final ICD-9-CM release. It sat under Complications of pregnancy, childbirth, and the puerperium (630–679) in the legacy hierarchy.

Related References

ICD-9-CM IndexAll of Complications of pregnancy, childbirth, and the puerperiumAll of 660-669ICD-9 / ICD-10 ConverterICD-9 Code LookupICD-10-CM Codes ListICD-10-PCS Codes List

Source: final CMS ICD-9-CM release (version date October 1, 2014). Retired from U.S. claims after September 30, 2015.