Please note that this is Thai immigration in Nakhonpathom and not Thai Immigration in Nakhonphanom. The immigration office can assist you with a Thai visa extension such as a retirement visa or marriage visa extension. They can also extend you tourist visa as a tourist.
If you have a work permit or an extended marriage visa you can also do your 90 day reporting at the immigration office. They can also transfer a visa from one passport to another if you have a passport which is full and needs to be replaced. speak to them also about a re-entry permit if you are leaving the country. Their contact details are listed below.
Thai Immigration in Nakhonpathom
Wat Rai Khing Soi 14
Service area: Provinces of Nakhon Pathom, Ratchaburi