I always hesitate to pass judgment on a situation without being able to know all of the details, but it certainly sounds to me like a non-compliant situation and I agree with what the others have said. As I see it, there are three main issues here: 1) the plan of care is the responsibility of the provider, not of the coder or non-clinical staff. This is what they're trained and paid to do and I have trouble believing that a provider would even allow this into their patients' charts - most providers I've worked with are not very receptive to non-clinical people making suggestions as to how they should care for their patient. Patients and their plans are paying for this service to be done by a trained clinician, not by ancillary staff. But all that said, you may wish to consider that by asking you to do this, they could also be putting you in the position of violating state laws against practicing medicine without a license. 2) As Debra has explained very well above, under CMS guidelines, this is not a compliant practice for amending medical records. Giving feedback to providers or querying them for clarification is one thing, but 'leading' them to add documentation to previously completed medical records is quite another - the latter is absolutely not compliant. 3) If your boss or employer is giving you the idea that your job could be at risk for speaking up about a legitimate concern raised in good faith, that is considered retaliation which is yet another non-compliant practice, and you are protected by whistleblower laws. Understood, though, that it is not an easy process to have to resort to and this all nonetheless puts you in a difficult position.
I think all of us, to a greater or lesser degree, come across some kinds improprieties in the course of our work in this crazy, dysfunctional US healthcare system. At some point, we all have to decide whether or not those things that we see rise to the level of being a serious enough offense to warrant taking action, and this can take some soul-searching as there can always be consequences. Hopefully you can reach out to your compliance officer or someone else in a position to give you good advice and steer to you a good way to resolve the situation. Perhaps the most important piece of advice is to keep good notes of your discussions and communications, and keep these as a record of when, with whom and what you talked about. Insist on an acknowledgement in writing from whomever you report this to so that there is a clear record that they have registered your concerns and are taking the proper steps to address them. Hope these discussions here are helpful to you through this.