ICD-10

What are the relevant ICD-10 codes that are accurate to describe conditions like “excessive pronation”, varus/valgus, or pes cavus issues?

“I have a simple question for which I have not been able to find the correct answer. I have a Medicare patient whom we took to the operating room to remove 3 skin lesions. Two were removed from the left foot and one was removed from the right foot. We used code CPT 11421 and are planning on billing the following way: CPT 11421 – 50 (2 units, one lesion on the LT and one the RT) CPT 11421 – LT (the other lesion on the LT) I checked CCI edits and it says I do not need to use a 59 modifier but I feel like I should. Some people have said to use XS modifier. Some have said to bill one code 3 units and others to bill 11421 3 times. What’s the correct answer?”

“I have a patient who has Blue Cross insurance. He came in for a matrixectomy on February 8th and returned on February 15th for follow up. I billed CPT 99213 using M79.673 and T81.40XA for the follow up and the claim was denied. Is there another code or modifier that I should include?”

“On all of our patients that qualify for routine foot care with the diagnosis of I70.203 Atherosclerosis we send an “Atherosclerosis Letter” to the patient’s treating doctor with our findings and ask them to sign if they agree with our findings. 99% of the time the doctors send the letter back signed. We have always done this in accordance with the routine foot care LCD that in the past stated that we had that letter or documentation from the treating physician in our patient’s chart “in a timely manner.” Recently we have had some doctors sending back the letter, disagreeing with our findings. We have already billed the services from their initial visit knowing or thinking that we will have that documentation for the next appointment in 9 weeks. This led me to research the LCD again, and I am unable to locate the verbiage that was used before about the patient’s other treating doctors agreeing and signing anything. It merely states that we have our findings in the note and the other doctor’s name on the claim to Medicare. Do we need that letter agreed to and signed from the patient’s other doctor? Do other offices also send this “letter” to get that info? Any input is greatly appreciated.”

“I have a patient who honestly only has three mycotic/dystrophic toenails. This elderly gentleman, with Medicare, returns to the office every 90 days for routine foot care (RFC). According to Medicare guidelines, he does qualify for RFC with his physical examine findings. My question is can I bill CPT 11720 for the debridement of the three dystrophic nails and then CPT 11719 for the trimming of the other seven non-dystrophic toenails?”

“My practice involves a lot of routine foot care and I am looking for clarification. In using Q8 and Q9 modifiers, do you need to have atherosclerotic peripheral vascular disease (ASPVD) as a diagnosis? If so what’s the code to be used for general ASPVD? Modifier Q7 indicates that there has been an amputation. It is not necessary to have an ASPVD diagnosis in that scenario?”

​​​​​​​“I saw a patient on March 20, 2020 with a new, mildly displaced 3rd metatarsal fracture (S92.332A). I have been following him since then and have billed Anthem Blue Cross with ICD10 S92.331D and have gotten reimbursed. The last visit I had with the patient was August 17, 2020 and billed Anthem Blue Cross for S92.332S. The claim was denied as Missing/incomplete/invalid principal diagnosis. Isn’t S92.332S a valid primary diagnosis code?”

“Can CPT code 29580 (strapping – Unna’s boot) be used for ICD code M65.871(2) in lieu of CPT code 29540? If not, what is the best ICD 10 code for CPT 29580?”

Medicare has released updated articles to reflect the annual ICD-10 update. These updates are effective on October 1 and change the coding and documentation requirement for many services we provide.