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2007 ICD-9-CM Diagnosis Code V09
Infection with drug-resistant microorganisms
2007 ICD-9-CM Diagnosis Code V09.0
Infection with microorganisms resistant to penicillins
2007 ICD-9-CM Diagnosis Code V09.1
Infection with microorganisms resistant to cephalosporins and other b-lactam antibiotics
2007 ICD-9-CM Diagnosis Code V09.2
Infection with microorganisms resistant to macrolides
2007 ICD-9-CM Diagnosis Code V09.3
Infection with microorganisms resistant to tetracyclines
2007 ICD-9-CM Diagnosis Code V09.4
Infection with microorganisms resistant to aminoglycosides
2007 ICD-9-CM Diagnosis Code V09.5
Infection with microorganisms resistant to quinolones and fluoroquinolones
2007 ICD-9-CM Diagnosis Code V09.50
Without resistance to multiple quinolones and fluroquinolones
2007 ICD-9-CM Diagnosis Code V09.51
With resistance to multiple quinolones and fluroquinolones
2007 ICD-9-CM Diagnosis Code V09.6
Infection with microorganisms resistant to sulfonamides
2007 ICD-9-CM Diagnosis Code V09.7
Infection with microorganisms resistant to other specified antimycobacterial agents
2007 ICD-9-CM Diagnosis Code V09.70
Infection with microorganisms resistant to other specified antimycobacterial agents without resistance to multiple antimycobacterial agents
2007 ICD-9-CM Diagnosis Code V09.71
Infection with microorganisms resistant to other specified antimycobacterial agents with resistance to multiple antimycobacterial agents
2007 ICD-9-CM Diagnosis Code V09.8
Infection with microorganisms resistant to other specified drugs
2007 ICD-9-CM Diagnosis Code V09.80
Infection with microorganisms resistant to other specified drugs without resistance to multiple drugs
2007 ICD-9-CM Diagnosis Code V09.81
Infection with microorganisms resistant to other specified drugs with resistance to multiple drugs
2007 ICD-9-CM Diagnosis Code V09.9
Infection with drug-resistant microorganisms unspecified
  • tendency of biological systems (organisms, cells, or cell-free systems) to fail to respond as expected to drug treatment or exposure; may be due to specific enzymes, transporters, or receptors which block drug action.
  • OBSOLETE (was not defined before being made obsolete). [GOC:go_curators]
  • Diminished or failed response of an organism, disease, or tissue to the intended effectiveness of a chemical or drug. Mechanisms, functions, activities, or processes exhibited by pathogens to withstand previously toxic drugs.
2007 ICD-9-CM Diagnosis Code V09.90
Infection with drug-resistant microorganisms unspecified without multiple drug resistance
2007 ICD-9-CM Diagnosis Code V09.91
Infection with drug-resistant microorganisms unspecified with multiple drug resistance
  • Adaptation of tumor cells to anticancer drugs in ways that make the drugs less effective.
  • characteristic of certain cancer cells and infectious microorganisms, where resistance develops to a broad variety of chemically unrelated drugs; may be due to genetic induction of a membrane pump (P glycoprotein) or other mechanisms.
  • Simultaneous resistance to a spectrum of unrelated drugs following exposure to a single agent. It may result from overexpression of the integral plasma membrane protein, P-glycoprotein. This adaptation of tumor cells to anticancer drugs, mediated by inactivation of the drug or removing it from the target tumor cells, tends to make the drugs less effective.