Leif A Johnson, M.D.
Emergency Medicine · Alameda, CA
At a glance
2070 Clinton Ave, Alameda, CA 94501-4320
NPPES record updated Aug 29, 2019. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
2070 Clinton AveAlameda, CA 94501-4320
Additional reported practice locations
20103 Lake Chabot Rd Fl 1Castro Valley, CA 945465305
Phone: 5102476300
Fax: 5102476303 3901 Lone Tree Way
Antioch, CA 945096200
Phone: 9257793522
Fax: 9257797281 12 Camino Encinas
Orinda, CA 945633304
Phone: 5102048180
Fax: 9252540687 2500 Milvia St
Berkeley, CA 947042636
Phone: 5102045600
Fax: 5102045462 4053 Lone Tree Way Ste 200
Antioch, CA 945316210
Phone: 9257563499
Fax: 9257570849
Education & affiliations
- Medical / professional school
- Not reported in this file
- Graduation year
- 1991
- CMS specialties
- Emergency Medicine
Practice groups
Reported hospital affiliations
- Sutter Delta Medical Center Antioch, CA
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
Industry-reported general payments
No matching general-payment summary in the imported release. This is not a verified zero and does not rule out other payment types or years.
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Emergency Medicine
- Taxonomy code
- 207P00000X
- Enumeration date
- Jul 25, 2006
- Record updated
- Aug 29, 2019
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- M.D.
Reported taxonomies and licenses
207P00000X · Primary
License reported: G78115 CA
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
2070 Clinton AveAlameda, CA 94501-4320
- Phone
- (510) 523-4357
Mailing address
2100 POWELL STSUITE 900
EMERYVILLE, CA 946081826
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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