Hi,
As Coding King stated, you do not have the option to choose if the pt. is New or Established. If the pt. has not received any professional services from the physician or another physician in a group of the same specialty within the last 3 years then the pt. is automatically considered a new pt.... there are no exceptions to that rule. If the encounter was under those circumstances then you must bill New pt...
Also, please understand that you must MEET or EXCEED the components (Hx, Exam, MDM) that are required.. Not sure of the location, but let's just say that you are coding a Outpatient Office Visit, the lowest code that you can use will be 99201. For this code, a brief HPI would have to be performed ( No ROS, or PFSH is required). Your overall History level would be problem focused.
For your Exam, One body area/Organ system will count as a Problem Focused Exam.. In your case the vitals do fall under Constitutional and depending on the documentation guidelines that you are following 95/97 it depends... The 95 DG's do not have any rules set on the amount of vitals that have to be obtained.. however, the 97 DG's state that the provider must document at least 3 (BP, Temp, Ht, Wt, etc.) in order for them to count as one overall organ system (Constitutional).
Your MDM would be considered straightforward, of course considering the elements that go into the MDM component.