Medicare paid $34 million for claims with faulty doc numbers. Physicians' NPI numbers will give you a much bigger billing headache if a federal watchdog agency gets its way. In 2007, durable medical equipment suppliers received $34 million in Medicare payments based on inactive or invalid physician UPINs and National Provider Identifier numbers, the Breakdown: Of the claims with inactive UPINs, $5 million were due to deceased physicians, the OIG reports.That's down from $8 million in 1999. More than 7 percent of the physicians whose numbers were on claims had been deceased for more than five years before the claim's date, the OIG criticizes in the report. Caveat: Suppliers took major heat last summer for billing related to deceased physicians, culminating in a Senate hearing and high-profile news articles in the The OIG wants CMS to take the following steps, it says in the report: • Determine why claims with identifiers for deceased referring physicians continue to be paid; • Implement claims system changes to ensure NPIs for both referring physicians and suppliers are valid and active; • Emphasize to suppliers the importance of using accurate NPIs for themselves and their referring physicians; and • Determine the earliest date to end the provision that allows suppliers to submit claims without referring physician NPIs. Watch out: In comments on the report, CMS says it concurs with the recommendations and has already taken some steps to alleviate DME billing problems. Note: The report is at www.oig.hhs.gov/oei/reports/oei-04-08-00470.pdf.