Allergy, Asthma & Sinus Centers of Silicon Valley, Inc.
NPI 1609210590 · Allergy Physician · Castro Valley, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Allergy, Asthma & Sinus Centers of Silicon Valley, Inc. is a Allergy Physician organization in Castro Valley, CA (NPI 1609210590).
Provider details
- NPI number
- 1609210590
- Entity type
- Organization
- Primary specialty
- Allergy PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Kenneth Lien, President(510) 537-0700
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
13 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-04-22
- Last updated
- 2014-02-03
Frequently asked questions
- What is Allergy, Asthma & Sinus Centers of Silicon Valley, Inc.'s NPI number?
- Allergy, Asthma & Sinus Centers of Silicon Valley, Inc.'s National Provider Identifier (NPI) is 1609210590, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Allergy, Asthma & Sinus Centers of Silicon Valley, Inc.?
- Allergy, Asthma & Sinus Centers of Silicon Valley, Inc. is classified in the NPPES registry as Allergy Physician (Allopathic & Osteopathic Physicians).
- Where is Allergy, Asthma & Sinus Centers of Silicon Valley, Inc. located?
- Allergy, Asthma & Sinus Centers of Silicon Valley, Inc.'s practice location on file with NPPES is 20400 Lake Chabot Rd Ste 304, Castro Valley, CA 94546-5316.
- What is Allergy, Asthma & Sinus Centers of Silicon Valley, Inc.'s phone number?
- The practice phone number listed in the NPPES registry for Allergy, Asthma & Sinus Centers of Silicon Valley, Inc. is (510) 537-0700.
- Does Allergy, Asthma & Sinus Centers of Silicon Valley, Inc. accept Medicare?
- Allergy, Asthma & Sinus Centers of Silicon Valley, Inc. is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Allergy, Asthma & Sinus Centers of Silicon Valley, Inc.?
- The authorized official listed on Allergy, Asthma & Sinus Centers of Silicon Valley, Inc.'s NPPES record is Kenneth Lien, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Allergy, Asthma & Sinus Centers of Silicon Valley, Inc.'s NPI active?
- Yes — Allergy, Asthma & Sinus Centers of Silicon Valley, Inc.'s NPI (1609210590) is active in the NPPES registry as of the last update on 2014-02-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.