The claim that Iran's missile strikes on U.S. Military bases have killed and wounded at least 200 service members is unverified because only Iranian state sources, specifically the IRGC via TASS, report these figures, while independent and U.S. Sources do not confirm any casualties.
The Iran regime claims its missile strikes on U.S. military bases have k*lled and wounded at least 200 service members.

Iran strikes U.S. bases: Complete list of bases under attack - The Hindu
Source: thehindu.com
Key Evidence
The IRGC statement quoted by TASS claims 200 killed or wounded.
tass.comtass.comIranian strikes on US bases kill 200 servicemen — IRGC - World
No independent or U.S. Military confirmation of casualties matching this number is found in multiple other reputable sources.
thehindu.comthehindu.comIran strikes U.S. bases: Complete list of bases under attack
nytimes.comnytimes.comInitial Focus of U.S. Strikes in Iran Is Military Targets+5 more
Past incidents show Iran's casualty claims in missile strikes are often disputed or unconfirmed.
stripes.comstripes.comIran likely to respond to renewed US strikes more forcefully than last time,...
What the Evidence Shows
The Iranian Revolutionary Guard Corps (IRGC) has publicly claimed that their missile strikes on U.S. Military bases resulted in at least 200 U.S. Service members being killed or wounded, as reported by the Russian news agency TASS.tass.comtass.comIranian strikes on US bases kill 200 servicemen — IRGC - World
However, this figure has not been independently confirmed by U.S. Military officials or other international sources. Other major news outlets covering the event focus on the missile attacks and retaliatory strikes but do not report verified casualty numbers matching Iran's claims.thehindu.comthehindu.comIran strikes U.S. bases: Complete list of bases under attack
nytimes.comnytimes.comInitial Focus of U.S. Strikes in Iran Is Military Targets+5 more
Historically, similar claims from Iran about casualties in missile strikes have often been disputed or uncorroborated by independent investigations.stripes.comstripes.comIran likely to respond to renewed US strikes more forcefully than last time,... Given the lack of confirmation from U.S. Or allied sources and reliance solely on Iranian state media for casualty figures, the claim remains unverified.