| OMB | Office of Management and Budget |
|---|---|
| OPM | occult primary malignancy; Office of Personnel Management; ophthalmoplegic migraine |
| PBMC | peripheral blood mononuclear cell; pharmaceutical benefit management company |
| PCCM | pediatric critical care medicine; primary care case management; primary care case manager |
| PCM | patient care manager or management; patient classification system; primary cutaneous melanoma; proce... |