OrganizationActive
Mark Zeme
NPI 1912089525 · Otolaryngology Physician · Castro Valley, CA
Mark Zeme is a Otolaryngology Physician organization in Castro Valley, CA (NPI 1912089525).
Provider details
- NPI number
- 1912089525
- Entity type
- Organization
- Primary specialty
- Otolaryngology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Mark Zeme, President(510) 889-6673
- License
- G66448 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(90/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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
20083 Lake Chabot Rd
Castro Valley, CA 94546-5303
Phone: (510) 889-6673
Fax: (510) 889-0913
Street-level locationGet directions
Mailing address
20083 Lake Chabot Rd
Castro Valley, CA 94546-5303
Registry dates
- Enumerated
- 2006-10-20
- Last updated
- 2020-08-22
Frequently asked questions
- What is Mark Zeme's NPI number?
- Mark Zeme's National Provider Identifier (NPI) is 1912089525, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Mark Zeme?
- Mark Zeme is classified in the NPPES registry as Otolaryngology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Zeme located?
- Mark Zeme's practice location on file with NPPES is 20083 Lake Chabot Rd, Castro Valley, CA 94546-5303.
- What is Mark Zeme's phone number?
- The practice phone number listed in the NPPES registry for Mark Zeme is (510) 889-6673.
- Who is the authorized official for Mark Zeme?
- The authorized official listed on Mark Zeme's NPPES record is Mark Zeme, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Mark Zeme's NPI active?
- Yes — Mark Zeme's NPI (1912089525) is active in the NPPES registry as of the last update on 2020-08-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.