You can get tested for PCOS at your primary care doctor’s office, a gynecologist, or an endocrinologist. Any of these providers can order the blood work and imaging needed to evaluate you, though gynecologists and endocrinologists are the most common starting points. If your primary care doctor suspects PCOS based on your symptoms, they may handle the initial workup themselves or refer you to a specialist.
Which Doctors Diagnose PCOS
Three types of specialists typically handle PCOS evaluation: gynecologists, endocrinologists (hormone specialists), and reproductive endocrinologists (fertility specialists). A gynecologist is often the first stop because the most noticeable symptoms, like irregular periods and excess hair growth, fall within their scope. If your symptoms are more metabolic, such as unexplained weight gain, insulin resistance, or blood sugar problems, an endocrinologist may be a better fit.
Reproductive endocrinologists come into play when you’re trying to conceive and PCOS is a suspected barrier. Your primary care provider can also run the initial blood tests and refer you based on results, which saves time if you already have an established relationship with them.
What the Diagnostic Process Looks Like
PCOS is diagnosed using the Rotterdam Criteria, which require you to meet at least two of three conditions: irregular or absent ovulation (often showing up as missed or unpredictable periods), elevated androgen levels (either through blood tests or visible signs like excess hair growth or acne), and polycystic-appearing ovaries on ultrasound. No single test confirms PCOS on its own. It’s a clinical diagnosis built from multiple pieces of evidence.
Importantly, PCOS is also a diagnosis of exclusion. Before your doctor can confirm it, they need to rule out other conditions that cause similar symptoms. This means the testing process involves both looking for PCOS markers and checking that nothing else explains what you’re experiencing.
Blood Tests You Should Expect
Your doctor will likely order several hormone and metabolic tests. The core panel typically includes:
- Total testosterone: The main marker for elevated androgens. Most people with PCOS have levels at or below 150 ng/dL. Values above 200 ng/dL raise concern for an ovarian or adrenal tumor rather than PCOS.
- DHEA-S: An androgen produced by the adrenal glands. Mildly elevated levels are common in PCOS, but values above 800 µg/dL suggest an adrenal tumor.
- LH and FSH: These two hormones regulate ovulation. A ratio of LH to FSH of 2.0 or higher is suggestive of PCOS, though it’s not definitive on its own.
- Fasting glucose and insulin: Used to check for insulin resistance, which affects a large percentage of people with PCOS. Your doctor may calculate a fasting glucose-to-insulin ratio to assess this.
To rule out conditions that mimic PCOS, your doctor will also check thyroid function, prolactin levels, and a hormone called 17-hydroxyprogesterone (which screens for a genetic adrenal condition called non-classic congenital adrenal hyperplasia). In some cases, testing for Cushing syndrome is warranted too.
When to Schedule Your Blood Work
Timing matters for hormone testing. Ideally, blood work should be drawn on day 3 of your menstrual cycle, counting the first day of your period as day 1. This timing gives the most accurate baseline reading of your reproductive hormones. When your period starts, call your doctor’s office to schedule the blood draw for two days later.
If your periods are very irregular or absent, your doctor may draw blood at any point since there’s no reliable cycle day to target. You’ll also want to fast before your appointment if glucose and insulin testing is part of the panel. If you’ve been on hormonal birth control, testosterone results can be skewed. Ideally, you’d be off oral contraceptives for about three months before testing to get an accurate reading, though your doctor will weigh whether that’s practical in your situation.
The Physical Exam
Before ordering tests, your doctor will assess visible signs of excess androgens. The most common is hirsutism, or coarse hair growth in areas like the upper lip, chin, chest, abdomen, and back. Doctors use a standardized scoring system that evaluates hair density across 11 body areas on a scale of 0 to 4 each. A combined score of 8 or higher (out of a possible 36) is considered diagnostic of hirsutism. Your doctor will also look for acne, thinning hair on the scalp, and a skin change called acanthosis nigricans (darkened, velvety patches typically on the neck or underarms that signal insulin resistance).
Pelvic Ultrasound
An ultrasound checks whether your ovaries have the characteristic “polycystic” appearance, which means they contain a higher-than-normal number of small follicles. Despite the name, these aren’t true cysts. They’re immature egg-containing follicles that haven’t developed fully due to hormonal imbalance. Ovarian volume may also be measured. This ultrasound is usually transvaginal for the clearest image, though an abdominal ultrasound is sometimes used instead.
Not everyone with PCOS has polycystic-appearing ovaries, and some people without PCOS do. That’s why the ultrasound is just one of three criteria, not a standalone diagnostic tool.
Screenings After Diagnosis
Once PCOS is confirmed, your doctor should screen you for diabetes. Both the American College of Obstetricians and Gynecologists and the American Diabetes Association recommend diabetes screening at the time of PCOS diagnosis, with repeat testing every 3 to 5 years if results are normal. This can be done through a fasting glucose test, hemoglobin A1C, or an oral glucose tolerance test, where you drink a sugary solution and have your blood drawn afterward to see how your body handles the sugar load. Some experts consider the oral glucose tolerance test the most reliable option for this population.
PCOS also raises your long-term risk for heart disease and endometrial cancer, so your provider may discuss cholesterol testing, blood pressure monitoring, and strategies like maintaining regular periods (whether naturally or with medication) to protect the uterine lining.
Cost and Access Considerations
The diagnostic workup for PCOS is relatively affordable compared to the ongoing cost of managing the condition. Research from the Endocrine Society found that the initial diagnostic process accounts for less than 2 percent of the total cost burden of PCOS care. Most of the expense comes from long-term treatment and managing complications like diabetes and infertility.
If cost is a concern, community health centers and Planned Parenthood locations can often perform the initial evaluation and blood work on a sliding-fee scale. Many labs also offer self-pay pricing for hormone panels if you want to get preliminary testing done before a specialist visit. With insurance, the combination of an office visit, blood panel, and ultrasound is typically covered as diagnostic testing when your doctor documents the medical necessity based on your symptoms.