The former Clutha-Southland MP resigned after the Herald revealed he had leaked confidential Covid-19 information.
His spending records also show $4000 for Wellington accommodation in the final quarter of last year.
In late July, the Otago Daily Times reported Walker embarked on a thank you road trip in his then-electorate.
Meanwhile, the list of MPs expenses revealed New Zealand's 120 MPs spent a collective $2.17 million in the final quarter of last year.
The biggest spender of all MPs, perhaps unsurprisingly, was Prime Minister Jacinda Ardern, who racked up $46,600 between October 1 and December 31 last year.
She was followed by Damien O'Connor, David Parker and Kelvin Davis – all live geographically far from Wellington.
This all consists of regular accommodation and travel costs.
All up, ministers spent a collective $658,000 in the fourth quarter of last year.
This is lower than in previous years as there was no international travel costs charged to taxpayers as New Zealand's borders were closed.
In terms of highest-spending non-ministerial MPs, at a whisker under $60,000 National leader Judith Collins spent the most,
But this is not unusual, as the leader of the Opposition is eligible for VIP transport – that accounted for $36,200 worth of her quarterly cost.
Former leader Simon Bridges was the second-highest spending non-ministerial MP, and spent $31,660.
Collectively, non-ministerial MPs spent just over $1.5 million.