Need a Cromolyn prescription? Learn which doctors prescribe Cromolyn Sodium, how to find one near you, and what to expect at your appointment in 2026.
If you've been told you need Cromolyn Sodium — whether for mastocytosis, mast cell activation syndrome (MCAS), or another condition — you might be wondering where to start. Not every doctor is familiar with this medication, and finding a provider who understands when and how to prescribe it can feel like a challenge.
This guide walks you through the types of doctors who prescribe Cromolyn, how to find one near you, and what to expect at your first appointment.
Cromolyn Sodium is a mast cell stabilizer used primarily for systemic mastocytosis and mast cell activation syndrome. Because these are specialized conditions, the doctor who prescribes it will depend on your diagnosis and symptoms.
This is the most common type of specialist to prescribe Cromolyn. Allergists and immunologists are trained to diagnose and treat conditions involving the immune system, including mast cell disorders. If you have symptoms like flushing, itching, abdominal pain, or diarrhea that may be related to mast cell activation, an allergist is a strong starting point.
If your main symptoms are gastrointestinal — diarrhea, abdominal cramping, nausea, or vomiting — a gastroenterologist may be the one to prescribe Cromolyn oral solution. Some GI specialists use Cromolyn for conditions like inflammatory bowel disease or eosinophilic esophagitis as well.
For patients with confirmed systemic mastocytosis, a hematologist or oncologist often manages treatment. These specialists are familiar with the full range of mast cell disorders and can prescribe Cromolyn as part of a broader treatment plan.
Your primary care doctor can prescribe Cromolyn if they're familiar with your condition. However, because mast cell disorders are relatively uncommon, many primary care providers may prefer to refer you to a specialist first. If you already have a diagnosis, your PCP may be comfortable writing the prescription.
If you were previously using the inhaled form of Cromolyn (Intal, now discontinued) for asthma, a pulmonologist may have been your prescriber. While the inhaled form is no longer available, pulmonologists may still be involved in your care if mast cell issues affect your lungs.
In cases where mast cell symptoms primarily affect the skin — hives, flushing, or skin lesions — a dermatologist experienced with mast cell disorders may prescribe Cromolyn.
Once you know which type of specialist to look for, here are the best ways to find one in your area.
Start with your insurance company's online directory. Search for allergists, immunologists, or gastroenterologists in your network. This ensures you'll have coverage for the visit itself. Call the office before booking to confirm they treat mast cell disorders or prescribe Cromolyn.
Online platforms like Zocdoc and Healthgrades let you search for specialists by condition and location. You can filter by insurance accepted, read patient reviews, and often book appointments online. Search for "mast cell" or "mastocytosis" to find doctors with relevant experience.
If you have a primary care doctor, ask them for a referral to an allergist or immunologist. Many insurance plans require a referral to see a specialist anyway. Your PCP can help identify the right type of specialist based on your symptoms.
Cromolyn is not a controlled substance, which means it can be prescribed via telehealth in most states. If there are no specialists near you — or if wait times are long — a telehealth appointment may be a good option. Some telehealth platforms specialize in complex conditions and can connect you with doctors experienced in mast cell disorders.
Patient communities for mastocytosis and MCAS often maintain lists of doctors who are experienced with these conditions. Organizations like The Mastocytosis Society or online support groups on Facebook and Reddit can be valuable resources for finding knowledgeable providers.
Knowing what to prepare for can make your first visit go more smoothly.
Your doctor will likely ask detailed questions about your symptoms and may order blood tests (such as serum tryptase levels) or other diagnostic tests. If they determine Cromolyn is appropriate for you, they'll write a prescription — typically for Cromolyn Sodium oral solution (100 mg/5 mL ampules), taken four times daily before meals and at bedtime.
Be sure to ask your doctor:
It's possible you'll encounter a doctor who hasn't prescribed Cromolyn before. This doesn't necessarily mean you need a different provider. You can share information about Cromolyn's FDA-approved uses and ask if they'd be willing to prescribe it based on your clinical picture. If they're not comfortable, ask for a referral to a specialist who is.
Getting the prescription is only half the battle. Cromolyn Sodium oral solution has been experiencing an ongoing shortage since 2023, which means your local pharmacy may not have it in stock.
Here's what to do next:
Finding a doctor who can prescribe Cromolyn may take a little extra effort, but it's absolutely doable. Start with an allergist or immunologist if you're not sure where to go, use your insurance directory and online tools to find providers, and don't hesitate to ask about telehealth options if specialists are scarce in your area.
Once you have your prescription, Medfinder can help you find a pharmacy that has Cromolyn in stock — so you can focus on feeling better, not calling pharmacies.
You focus on staying healthy. We'll handle the rest.
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