Mark Johnston works as a doctor in Lancaster. Practices under license number MD425522, cross-checked against public registries. Prolio refreshes this listing weekly so the public information stays current and you're not reading a page Google forgot about years ago. You can contact Mark Johnston directly from this page — we don't take a commission, we don't resell the lead, and we don't sit between you and the professional. If you're Mark Johnston and want to edit this profile yourself, you can claim it for free at the bottom of the page.
Mark Johnston — registro NPI #1003898131. Datos públicos NPPES (CMS).