CPT For Nitrazine pH

Here is a link to the website where CMS publishes all the updates to the Clinical Laboratory Fee Schedules.     Clinical Laboratory Fee Schedule Files | 

I would use
| 83986  |   | 20230101  | N  | 3.58  | Assay ph body fluid nos  | Body fluid pH level  | Ph; body fluid, not otherwise specified
And for a Medicaid Modifier
| 83986  | QW  | 20230101  | N  | 3.58  | Assay ph body fluid nos  | Body fluid pH level  | Ph; body fluid, not otherwise specified