Best Immunologist Lancaster Near Me

4worldlovers: California Allergy and Asthma Medical Group is a practice dedicated to providing the latest and most up-to-date diagnostic and treatment options in allergy and asthma care. Dr. Ricardo Tan offers over 20 years of experience and expertise as a nationally and internationally recognized practitioner in this field.

Our family of providers and staff strive to give patients comprehensive evaluation and therapy with a personal touch and attention. We will always work to ensure that your office visits are pleasant, enlightening and will make the best use of your valuable time. We have early and late office hours and Saturday hours to accommodate your schedule.

Our Clinical Research division offers patients and volunteers the opportunity to participate in clinical trials of promising new treatments for allergy, asthma, sinusitis, atopic dermatitis, COPD, hives, and other conditions.

4worldlovers: Providers in your plan or accepting new patients, call 1-800-464-4000 (toll free) or 711 (TTY for the hearing/speech impaired)


The information in this online directory is updated periodically. The availability of physicians, hospitals, providers, and services may change. Information about a practitioner is provided to us by the practitioner or is obtained as part of the credentialing process. If you have questions, please call us at 1-800-464-4000 (toll free). For the hearing and speech impaired: 1-800-464-4000 (toll free) or TTY 711 (toll free). You can also call the Medical Board of California at 916-263-2382, or visit their website


We want to speak to you in the language that you’re most comfortable with when you call or visit us. Qualified interpreter services, including sign language, are available at no cost, 24 hours a day, 7 days a week during all hours of operations at all points of contact. We do not encourage the use of family, friends or minors as interpreters. Only the services of interpreters and qualified staff are used to provide language assistance. These may include bilingual providers, staff, and healthcare interpreters. In-person, telephone, video, and alternative modes of communication are available. Learn more about interpreter services.

If you would like to report an error in provider or facility information, please contact us.

Medicare Members: To request a hard copy of Kaiser Permanente’s provider directory, please call our Member Services department at 1-800-443-0815, seven days a week, 8 a.m. to 8 p.m. Kaiser Permanente will mail a hard copy of the provider directory to you within three (3) business days of your request. Kaiser Permanente may ask whether your request for a hard copy is a one-time request or if you are requesting to receive the provider directory in hard copy permanently.

If you request it, your request for hard copies of the provider directory remains until you leave Kaiser Permanente or request that hard copies be discontinued.

Medi-Cal Members: This directory includes Kaiser Permanente’s outpatient pharmacies. You can get any drugs covered by Kaiser Permanente at one of these pharmacies. You can get outpatient drugs covered by Medi-Cal at any Medi-Cal Rx Pharmacy. It does not have to be a Kaiser Permanente network pharmacy. Most Kaiser Permanente network pharmacies are Medi-Cal Rx pharmacies. Your pharmacy can tell you if it is part of the Medi-Cal Rx network. If you want to find a Medi-Cal pharmacy outside of Kaiser Permanente, you can use the Medi-Cal Rx Pharmacy Locator online at www.Medi-CalRx.dhcs.ca.gov

. You can also call Medi-Cal Rx Customer Service at 1-800-977-2273, 24 hours a day, 7 days a week (TTY 711 Monday through Friday, 8 a.m. to 5 p.m.).

Medi-Cal Members: Enhanced Care Management and Community Supports services require prior authorization and are limited to members who meet specific eligibility criteria.

Kaiser Permanente enrollees have full and equal access to covered services, including enrollees with disabilities as required under the Federal Americans with Disabilities Act of 1990 and Section 504 of the Rehabilitation Act of 1973.