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According to the Centers for Disease Control and Prevention, ICD-9 stands for International Classification of Diseases, 9th Revision, which is the current global system of codes used to classify diagnoses and causes of death. Beginning Oct. 1, 2015, ICD-10 codes will replace ICD-9 codes, which will become obsolete.

The ICD-9 code for “erectile dysfunction, organic” is 607.84. Other related diagnoses, which also fall under the 607.84 code, include “impotence of organic origin,” “organic impotence,” and “impotence, s/p prostatectomy, urethral.” Replacing 607.84 under ICD-10 will be N529, defined as “male erectile dysfunction, unspecified.”

The ICD-9 code for “erectile dysfunction, non-organic” is 302.72. Other definitions that fall under the 302.72 code are “erectile dysfunction, psychogenic” and “psychosexual dysfunction with inhibited sexual excitement.” Under ICD-10, the 302.72 code will be replaced with F5221 for “male erectile disorder” or F528 for “other sexual dysfunction not due to a substance or known physiological condition.”

There is no single answer to this question, because what works best for some men with ED doesn’t necessarily work as well for others. And for some, the use of any of the PDE5-inhibiting drugs may be inappropriate because of underlying health conditions or because of possible conflicts with other medications they are taking.

All of the PDE5 inhibitors — Viagra, Cialis, Levitra, Staxyn, and Stendra — work in pretty much the same way, although there are some slight differences in how quickly they take effect and some more significant differences in how long they are effective.

If you’re looking for a longer-lasting oral ED drug, your best bet is probably Cialis for Use as Needed, which can be effective for as long as 36 hours, earning it the nickname of the “weekend pill.”

Other medications include those used in penile injection and MUSE therapies. Injected into the erectile tissue of the penis or absorbed through the linings of the urethra, these medications include alprostadil, papaverine, and phenolamine.

When it comes to lifestyle choices, it’s a safe bet that anything that’s bad for your heart is also bad for your penis, according to Andrew McCullough, M.D., director of the male sexual health program at New York University’s Langone Medical Center. And diet is no exception.

Diets low in fruits and vegetables and high in processed foods that are fatty and/or fried impede healthy blood flow throughout the body, negatively impacting the heart and erectile function, according to WebMD. By contrast, the Mediterranean diet is heavily weighted toward fresh fruit and vegetables, red wine, whole grains, and heart-healthy fats such from fish, nuts, and olive oil. WebMD says studies have shown that the incidence of ED among men who follow the Mediterranean diet is very low.

A study published in the May 2010 issue of “The Journal of Sexual Medicine” looked specifically at the effects of adherence to the Mediterranean diet among a group of men diagnosed with type 2 diabetes, a major risk factor for ED. The incidence of ED was significantly lower among test subjects who followed the Mediterranean diet most faithfully.

Known scientifically as the post-ejaculation refractory time, or PERT, the time it takes to get a new
erection after ejaculation varies widely depending on the age of the man. Although hardly scientific, 30 minutes is perhaps the recovery time most commonly cited.

For young men in their 20s, erection recovery time ranges between 5 and 30 minutes, according to Drogo K. Montague, M.D., of the Cleveland Clinic’s Glickman Urological Institute. In an interview with Cosmopolitan, Montague said that the older the man is, the longer it takes to get a second erection.

After a man ejaculates, the muscles in the penile area relax and blood flow to the penis decreases
significantly.

In one of life’s cruel ironies, women don’t need to recharge their sexual batteries between lovemaking
sessions. “As long as she’s aroused and lubricated, a woman is physically capable of having sex as many
times as she wants without a break in between,” Montague told Cosmo.