Uterine Cavity Test · Clinic Matched for You

Saline Sonohysterogram (SIS)

The clearest look inside the uterus, without surgery

A saline sonohysterogram fills the uterus with sterile saline during a transvaginal ultrasound, so the lining stands out and polyps, fibroids, scar tissue or a septum can be seen. Fertility doctors usually order it when an ultrasound or HSG raises a question, or before IVF. Request it online and we find a fertility clinic near you that does it.

$60 Hera fee + the clinic's price, confirmed before you book

What is a saline sonohysterogram?

It starts as a transvaginal ultrasound. A doctor then places a thin catheter through the cervix and runs a little sterile saline into the uterus, which opens up the cavity so its walls show clearly on the screen. It takes about 10 to 15 minutes, uses no X-ray or dye, and most people feel mild cramping.

It shows the inside of the uterus in more detail than a plain ultrasound or an HSG: polyps, fibroids that bulge into the cavity, scar tissue and a septum, all of which can get in the way of an embryo implanting. It does not reliably show whether the fallopian tubes are open; that is the HSG, though some clinics add tiny air bubbles (HyCoSy) to check the tubes in the same visit.

When should you get one?

  • An ultrasound or HSG showed something in the uterus that needs a closer look
  • Bleeding between periods or unusually heavy periods
  • Two or more miscarriages
  • Before IVF or a frozen embryo transfer, when your doctor wants the cavity checked
  • IUI or IVF cycles that haven't worked

How it works

1. Request online, with no location to pick. Tell us your ZIP code and we take it from there.

2. We find your clinic. Within one business day we text you a fertility clinic near you that does sonohysterograms, its price and how to book. If the clinic needs a doctor's order first, Hera's physician can write it after a short video visit, and we tell you any cost before you book.

3. Go on day 5 to 10 of your cycle, after bleeding stops and before you ovulate; the clinic may ask for a pregnancy test first. The clinic's doctor reads the scan as it's done. We send you the report and make sure anything that needs follow-up has a doctor who will act on it.

Request your sonohysterogram — we find the clinic

Fertility clinics do sonohysterograms in the office, but many only for their own patients. Submit your request and within one business day we'll text you a clinic that will see you, its price and how to book. Hera's fee is $60; you pay the clinic for the test at your visit. Prefer to ask first? Text us your ZIP code.

Request a sonohysterogram — we'll match your clinic Text us your ZIP for a sonohysterogram — (915) 348-4512

Sonohysterogram codes (CPT and ICD-10)

If you're comparing a quote or checking a bill, these are the codes a clinic uses for a saline sonohysterogram.

CPT codes (what the clinic bills)

CodeWhat it covers
76831 (On a Hera request)Saline infusion sonohysterography, including color flow Doppler when done — the ultrasound with saline.
58340Catheter placed through the cervix and saline introduced — billed alongside 76831.

Diagnosis codes doctors commonly use (ICD-10)

CodeWhat it covers
Z31.41 (On a Hera request)Encounter for fertility testing.
N84.0Polyp of the uterine lining (endometrial polyp).
D25.9Leiomyoma of uterus, unspecified (fibroids).
N85.6Intrauterine adhesions (scar tissue inside the uterus).
N96Recurrent pregnancy loss.

A sonohysterogram is billed as two lines, the ultrasound with saline (76831) and the catheter (58340). Hera's $60 fee is separate. Coverage follows the diagnosis code: Z31.41 fertility testing is often excluded, while a finding or symptom such as a polyp (N84.0) or recurrent pregnancy loss (N96) is more often covered.

Saline Sonohysterogram FAQ

What does a saline sonohysterogram show?

The inside of the uterus: polyps, fibroids that bulge into the cavity, scar tissue and a septum, plus the thickness of the lining. The clinic bills it as CPT 76831 for the ultrasound with saline and 58340 for placing the catheter.

Does it hurt?

Most people feel mild cramping while the saline goes in, which settles within minutes; it is usually gentler than an HSG. Taking ibuprofen beforehand, if your clinic agrees, helps. A little watery discharge or spotting afterwards is normal.

When in my cycle should I have it?

On day 5 to 10, counting the first day of full flow as day 1: after bleeding stops, so the lining is thin and the view is clear, and before you ovulate. The clinic may ask for a pregnancy test on the day.

How much does a sonohysterogram cost?

Hera charges $60 to find the clinic and arrange it; you pay the clinic's price at your visit, and we confirm it with you before you book. The fertility clinic prices we have run about $780 cash. Many insurance plans cover it when there's a reason such as bleeding or miscarriages, so ask the clinic if you want to use yours. HSA and FSA cards are accepted at checkout.

Do I need one?

Not always. It isn't a routine first test: most workups start with blood tests, a transvaginal ultrasound and an HSG, and a fertility doctor adds a sonohysterogram when one of those raises a question, after miscarriages, or before IVF.

How is it different from an HSG or a regular ultrasound?

A regular transvaginal ultrasound looks at the ovaries and the shape of the uterus. The sonohysterogram adds saline to see inside the uterus in more detail. The HSG uses X-ray and dye and is the test that shows whether the tubes are open.

Should my partner get tested too?

Yes. A male factor is found in about half of couples who struggle to conceive, often alongside a female one. A semen analysis is the male baseline, and Hera can order it at a lab near you at the same time.