Dr. Ubaldo E. Martinez Outschoorn, Md

Philadelphia's oncology category shows 99 entries, and that number alone doesn't say much until you check what's actually attached to each one. Of those 99 listings, 99 include a phone number and 91 include a website, so nearly every name on the page comes with a real way to reach it rather than just an address sitting on a map. Listings cluster in a handful of zip codes, with 15 entries in one and 14 in another, plus smaller pockets scattered around, which gives a rough picture of where practices concentrate across the city.

None of these listings carry a Sponsored tag, since paid placement hasn't been switched on for this category yet, so scrolling through them means seeing plain data in the order it exists, not a paid ranking. Call two or three directly and ask about scheduling and insurance before committing to one. And if you run one of these practices and notice a missing website or a phone number that no longer connects, you can claim the listing and fix the details yourself, saving a Philadelphia patient from hitting a dead end mid-search.