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Clinic Type

Allergy/Asthma

Address

955 W Imperial Hwy, Suite 110, Brea, CA 92835

Phone

714-579-6826

Email

CHI@providence.org

Opening Hours

Mon - Fri: 8 a.m. - 5 p.m.

Services Offered

  • Allergy
  • Asthma
  • Immunology
  • Pediatrics
  • Geriatrics
  • Prevention
  • Diagnosis
  • Treatment
  • Allergy testing
  • Immunodeficient conditions
  • Nutrition and education in support of allergy/immunology care

Technology & Equipment

  • X-ray
  • Blood draws

Team

  • St. Jude Heritage Brea team, Board-certified, fellowship-trained — Allergy & Asthma specialists

Insurance & Payment

Not specified on page

Languages Spoken

  • Spanish (some staff)
  • Spanish

FAQs

What are the hours of operation?

Mon - Fri: 8 a.m. - 5 p.m.

Where is the clinic located?

955 W Imperial Hwy, Suite 110, Brea, CA 92835

Awards & Accreditations

  • 4.9 | 198 Ratings

Photos

What Patients Say

Overall sentiment across review platforms: mixed

  • Healthgrades (St. Jude Heritage Brea-Allergy & Asthma group directory): Be the first to leave a review (no group rating shown) (0 (implied by “Be the first to leave a review”))
  • Healthgrades (Dr. Alfred Moon, MD): Not shown in provided snippet; review highlights include very positive comments (17 ratings)
  • PSJHMedGroups (Dr Alfred Oh Moon, MD profile): 4.9 out of 5 (97 ratings)
  • Yelp (St. Jude Heritage Medical Group - Brea): Not shown in provided snippet; mixed review text shown (40 reviews (as shown in MapQuest snippet for the Yelp page))

Patients praise

  • Kind, attentive bedside manner and listening to patient history
  • Competent allergy/asthma management; explains testing and treatment clearly
  • Fear-free allergy testing experience and well-managed asthma attacks
  • Clean/high-tech office environment and generally efficient visits
  • Strong patient satisfaction rating (4.9/5) for Dr. Alfred Oh Moon (PSJHMedGroups)

Common complaints

  • Difficulty getting timely specialist appointments/limited access
  • Unacceptable wait times for visits/phone calls (virtual visit delay)
  • Perceived lack of care/concern about patients versus business
  • Administrative issues (e.g., fasting instructions not provided; testing needing separate day/location)
  • Office/location may be marked as permanently closed on MapQuest

"“I have seen Dr. Moon about 4-5 times and am very happy with him. He listens well.”"

PSJHMedGroups – Dr Alfred Oh Moon, MD profile

"“Dr. Alfred Moon, allergist, managed to make my allergy testing a fear free experience.”"

PSJHMedGroups – Dr Alfred Oh Moon, MD profile

"“UNACCEPTABLE Also… the soonest they can do a virtual visit is a week from today!!”"

Yelp content surfaced via MapQuest snippet

Synthesized from public review platforms as of Jul 10, 2026 — sources: [1][2][3][4].

Information sourced from the clinic's website as of July 10, 2026.

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