Dr. Tiffany Dy
- Gender: Female
- Experience: 12 years
- Graduation year: 2009
- Sole propriator: No
- NPI: 1528292174
Dr. Tiffany Dy MD
Allergist and Immunologist
She is located at 5201 Mid America Plaza Div Im Allergy And Immunology, Ste 2300 in Saint Louis, MO 63129. Can help patients with the following: Chest Pain, Diarrhea, Eye Allergy, Fever, Inguinal Hernia, Urethritis. Her National Provider Identifier (NPI) number is 1528292174. Appointment can be made via the phone number (314) 996-8670. She is affiliated with 2 hospitals.
Conditions treated
Dr. Tiffany Biason Dy, being an allergist and immunologist, treats the following conditions. Please be advised that this list may not be complete. For the full list of conditions treated, consult directly with Dr. Tiffany Dy.
- Abdominal Pain
- Acute Pain
- Allergic Reaction
- Allergies
- Anemia
- Arthritis
- Asthma
- Atherosclerosis
- Bladder Control
- Celiac Disease
- Chest Pain
- Cholecystitis
- Chronic Obstructive Pulmonary Disease (COPD)
- Chronic Rhinitis
- Common Cold
- Constipation
- Contact Dermatitis
- Cystitis
- Diarrhea
- Edema
- Eosinophilic Esophagitis
- Eye Allergy
- Fever
- Food Allergies
- Food Allergy
- Gastroesophageal Reflux Disease (GERD)
- General Care
- Hay Fever
- Headache
- Heart Disease
- Hiatal Hernia
- High Blood Pressure
- Hot Flashes
- Hyperlipidemia
- Hyponatremia
- Influenza
- Inguinal Hernia
- Lactose Intolerance
- Migraine
- Mold Exposure
- Nausea and Vomiting
- Obesity
- Osteoporosis
- Peanut Allergy
- Peptic Ulcer
- Pink Eye
- Plant Contact Allergy
- Prescription Refill
- Sinusitis
- Urethritis
- Urinary Tract Infection (UTI)
Procedures Performed by Dr. Tiffany Dy
ACA Marketplace (Obamacare/HealthCare.gov) plan networks
Insurers selling ACA Marketplace (HealthCare.gov) plans list Dr. Tiffany Dy as in-network for the following 2026 plans.
Health plans
Cox HealthPlans
Network data as of Sep 11, 2026, as reported by the insurer.
Show all 7 plans from Cox HealthPlans
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| Cox HealthPlans Bronze Expanded Standard | EPO · Expanded Bronze | EPO | Accepting new patients |
| Cox HealthPlans Bronze Preferred | EPO · Bronze | EPO | Accepting new patients |
| Cox HealthPlans Gold Preferred | EPO · Gold | EPO | Accepting new patients |
| Cox HealthPlans Gold Standard | EPO · Gold | EPO | Accepting new patients |
| Cox HealthPlans Silver Connect | EPO · Silver | EPO | Accepting new patients |
| Cox HealthPlans Silver Preferred | EPO · Silver | EPO | Accepting new patients |
| Cox HealthPlans Silver Standard | EPO · Silver | EPO | Accepting new patients |
UnitedHealthcare
Network data as of Sep 15, 2026, as reported by the insurer.
Show all 13 plans from UnitedHealthcare
| Plan | Plan type | Network tier | New patients |
|---|---|---|---|
| UHC Bronze Copay Focus $0 Indiv Med Ded ($0 Virtual Urgent Care, No Referrals) | EPO · Expanded Bronze | Non Preferred | Accepting new patients |
| UHC Bronze Essential (No Referrals) | EPO · Bronze | Non Preferred | Accepting new patients |
| UHC Bronze Standard (No Referrals) | EPO · Expanded Bronze | Non Preferred | Accepting new patients |
| UHC Bronze Standard+ (Dental + Vision, No Referrals) | EPO · Expanded Bronze | Non Preferred | Accepting new patients |
| UHC Gold Advantage ($0 Virtual Urgent Care, No Referrals) | EPO · Gold | Non Preferred | Accepting new patients |
| UHC Gold Advantage+ ($0 Virtual Urgent Care, Dental + Vision, No Referrals) | EPO · Gold | Non Preferred | Accepting new patients |
| UHC Gold Copay Focus $0 Indiv Med Ded ($0 Virtual Urgent Care, $8 Tier 2 Rx, No Referrals) | EPO · Gold | Non Preferred | Accepting new patients |
| UHC Gold Standard (No Referrals) | EPO · Gold | Non Preferred | Accepting new patients |
| UHC Silver Advantage ($0 Virtual Urgent Care, No Referrals) | EPO · Silver | Non Preferred | Accepting new patients |
| UHC Silver Advantage+ ($0 Virtual Urgent Care, Dental + Vision, No Referrals) | EPO · Silver | Non Preferred | Accepting new patients |
| UHC Silver Copay Focus $0 Indiv Med Ded ($0 Virtual Urgent Care, No Referrals) | EPO · Silver | Non Preferred | Accepting new patients |
| UHC Silver Standard (No Referrals) | EPO · Silver | Non Preferred | Accepting new patients |
| UHC Silver Standard+ (Dental + Vision, No Referrals) | EPO · Silver | Non Preferred | Accepting new patients |
This covers ACA Marketplace plans only, as reported by each insurer. It does not include employer, Medicare Advantage, or state-run exchange plans, and a plan missing from this list does not mean Dr. Tiffany Dy is out of network. Insurer directories can be out of date, so always confirm with the insurer and the office before your visit.
Medicare Enrollment
Dr. Tiffany Dy is enrolled to bill Medicare as a Practitioner - Allergy/immunology (also registered under: Practitioner - Internal Medicine) .
Bills through: Washington University
Based on Medicare's public enrollment records as of Jul 17, 2026. This reflects Medicare fee-for-service enrollment only and says nothing about other insurance, quality, outcomes, or board certification.
Payments received
Drug payment
| Baxter Healthcare | $124 |
| Meda Pharmaceuticals | $90 |
| Merck | $35 |
Other
| Food and Beverage | $302 |
Studies
Graduated in 2009Additional Specialities
- Internist
Questions & Answers
What conditions does Dr. Tiffany Biason Dy treat?
Dr. Tiffany Biason Dy provides treatment for Chest Pain, Diarrhea, Eye Allergy, Fever, Inguinal Hernia, Urethritis. For the full list see this list.
Does Dr. Tiffany Biason Dy accept patients with Cox HealthPlans?
Yes, Dr. Tiffany Biason Dy is listed in-network for Cox HealthPlans through the ACA Marketplace (Obamacare/HealthCare.gov). See the Marketplace plans section for details.
Has Dr. Tiffany Biason Dy affiliation with hospitals?
Dr. Tiffany Biason Dy is affiliated with BARNES JEWISH HOSPITAL. For the full list of hospitals see this list.
Where can you meet with Dr. Tiffany Biason Dy?
Dr. Tiffany Biason Dy's office is located at 5201 Mid America Plaza Div Im Allergy And Immunology, Ste 2300 in Saint Louis, MO 63129.