Ranked by profile completeness, registry tenure & documented Medicare activity — an honest, data-backed ordering, not a quality, outcomes, or patient-satisfaction verdict.
Compare 4 Allergy Physician providers with a practice address in Castro Valley, California. Every entry is a real NPI record you can open and verify; 100% of the ranked results below have a street-level (rooftop) location.
4 Allergy Physician practice in Castro Valley. Compare the most complete records below, or filter the full list by name and nearby ZIP.
Find Allergy Physician near you →Allergy Physician · Castro Valley, CA
Allergy Physician · Castro Valley, CA
Allergy Physician · Castro Valley, CA
Ranking reflects NPPES profile completeness, registry tenure, and documented Medicare activity (where present) — see our methodology. It is not a measure of clinical quality or patient satisfaction. Source: CMS NPPES (June 2026); specialty taxonomy: NUCC. Locations are geocoded from the public practice address.
