I have never used a “cheat sheet” when coding for a particular specialty but podiatry coding changed all that. There are lots of rules — and more rules. There are layers of modifiers when medical coding for foot care that must be sequenced correctly. (If you haven’t accessed the www. webinar on modifiers, this would be the time.) And there are insurance rules. Lots of them.

If you are unfamiliar with Medicare’s Local and National Coverage Determinations, visit their website at and get comfortable within the site. Medicare even provides a Podiatry Manual for reference. Your other alternative would be to subscribe to a website such as or These coding websites offer you everything a coder needs such as coding descriptions, accepted modifiers for a particular procedure, global periods, fees, RVUs (Relative Value Units) and more. For specific podiatry coding and billing information, there is a website available called that provides ongoing advice and allows the subscriber to present a question and receive accurate feedback from podiatrists.

Getting Started With Podiatry Coding Modifiers

So let’s begin with modifiers Q7, Q8, and Q9 for routine foot care.

While Medicare generally excludes routine foot care, there are exceptions to the rule:
1. A patient has a systemic disease that results in severe circulatory problems or desensitation in the legs or feet
2. Treatment of warts
3. Treatment of ulcers, wounds or infections
4. Treatment of mycotic nails (fungus) with indications of a Class A (Q7)), Class B (Q8) or Class C (Q9) or presence of a qualifying systemic condition such as metabolic, neurologic or peripheral vascular disease.

To apply a Class Finding, the following findings are necessary:

Q7 – Class A Finding (1 required): Non-traumatic amputation of the foot or integral skeleton portion.
Q8 – Class B Findings (2 required): (1) Absent posterior tibial pulse (2) Absent dorsalis pedis pulse (3) Advanced trophic changes where three of the following are required: hair growth (absence or decrease), nail changes such as thickening, pigmentary changes, skin texture (thin, shiny) and skin color (rubor or redness)
Q9 – Class C Findings (1 Class B and 2 Class C required): Claudication, Edema, Paresthesia, Temperature Changes and Burning

Coders need to present diagnosis codes and a class finding (if applicable) that will aid the biller in applying pertinent information to the claim form should documentation indicate it. For example, if documentation points to ICD-9-CM code 250.70 – Diabetes Mellitus with Peripheral Circulatory Disorder, Unspecified with manifestation code 785.4 – Gangrene, the biller will enter in block 19 of the CMS-1500 form, the date the patient was last seen by the doctor currently treating the systemic condition (every 60 days) and the physician’s NPI. She will need to know the global period of a procedure in the event the patient has to be seen for other issues on another day, which often happens in podiatry.

If multiple surgical procedures are performed, remember to use payable modifiers before class finding Q modifiers, or the ten digit toe modifiers (TA-T9), or the left or right foot modifier (LT, RT). There are a lot of precise rules to coding and billing Podiatry.

Coming soon: PART 2: Podiatry- Routine Foot Care Exclusions, CPT/HCPCS Codes and DME

Related Podiatry Coding Content:

Getting Started With Podiatry Coding Modifiers (Part 1)