An access code is a sequence of 4 letters from the alphabet. How many codes are possible (a) If repetition of letters is allowed? (b) If repetitions are not allowed? (c) If there is at least one repetition?

Dr. Shull is preparing to perform open-heart surgery on Fred Faulkner. Dr. Lowell is asked to assist because a surgical resident is not available. Which modifier should be appended to the procedure code on Dr. Lowell's claim for services?

Use an equivalent rate to convert 24 centiliters to liters.

Charles McBroom, a 4-week-old male, was rushed into surgery for repair of a septal defect. If the repair is not completed successfully, he may not survive. What is the correct anesthesia Physical Status Modifier?

Add or subtract as indicated. $\frac{5 y+13}{y+1}-\frac{1-7 y}{y+1}$

For

$$\mathbf{p}=\left( \begin{array}{l}{1} \\ {5}\end{array}\right), \quad \mathbf{q}=\left( \begin{array}{c}{-2} \\ {4}\end{array}\right) \quad \text { and } \quad \mathbf{r}=\left( \begin{array}{c}{-3} \\ {-1}\end{array}\right)$$

find: a. -3p b. $\frac{1}{2} \mathbf{q}$ c. 2p + q d. p – 2q e. $\mathbf{p}-\frac{1}{2} \mathbf{r}$ f. 2p + 3r g. 2q – 3r h. $2 \mathbf{p}-\mathbf{q}+\frac{1}{3} \mathbf{r}$

Patricia Harris, an 82-year-old female, is having Dr. Harmon remove a cyst from her left ring finger.

Calculate. $\int_{0}^{1/2}{{\cos}\pi x{\cos}\dfrac{1}{2}\pi x}dx$

Calculate the average rate of change of $g(x)=\sqrt[3]{x}+3$ for $4\leq x \leq 7$

Glenda Roberts, a 61-year-old female, goes to see Dr. Zentz at the referral of her family physician, Dr. Younts, for his opinion as to whether or not she should have surgery. After the evaluation and Glenda's agreement, Dr. Zentz schedules surgery for Thursday. Which modifier should be appended to Dr. Zentz's consultation code for today's evaluation?

Christopher Slice, a 17-year-old male, was brought into the OR in the Bracker ASC to have a programmable pump inserted into his spine for pain control. After the anesthesia was administered and Chris was fully unconscious, Dr. Sutton made the first incision. Chris began to hemorrhage. The bleeding was stopped, the incision was closed, and the procedure was discontinued.

Dr. Julienne performed a biopsy on the left external ear of Ben Maas, a 69-year-old male.

Dr. Smyth performed an appendectomy on Lynda Lyman. However, the operation took twice as long as usual because Lynda weighs 356 pounds.

Dr. Clayton removed Ricky Pujara's gallbladder 10 days ago. Today, he comes to see Dr. Clayton because of a problem with his knee. Which modifier should be appended to the encounter's E/M code?