Leif Johnson, M.D.
NPI 1851314611 · Emergency Medicine Physician · Alameda, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Leif Johnson, M.D. is a Emergency Medicine Physician provider in Alameda, CA (NPI 1851314611).
Provider details
- NPI number
- 1851314611
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G78115 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
6 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
631 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 194 | $194 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 178 | $9 |
| Critical Care, Each Additional 30 Minutes99292 | 74 | $122 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 63 | $134 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 50 | $161 |
| Critical Care, First 30-74 Minutes99291 | 45 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cephalexin | 28 | 27 |
| Ibuprofen | 15 | 15 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 13 | 11 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 12 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (5)
- 3901 Lone Tree WayAntioch, CA 94509-6200Phone: (925) 779-3522Fax: (925) 779-7281
- 4053 Lone Tree Way Ste 200Antioch, CA 94531-6210Phone: (925) 756-3499Fax: (925) 757-0849
- 2500 Milvia StBerkeley, CA 94704-2636Phone: (510) 204-5600Fax: (510) 204-5462
- 20103 Lake Chabot Rd Fl 1Castro Valley, CA 94546-5305Phone: (510) 247-6300Fax: (510) 247-6303
- 12 Camino EncinasOrinda, CA 94563-3304Phone: (510) 204-8180Fax: (925) 254-0687
Registry dates
- Enumerated
- 2006-07-25
- Last updated
- 2019-08-29
Frequently asked questions
- What is Leif Johnson's NPI number?
- Leif Johnson's National Provider Identifier (NPI) is 1851314611, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leif Johnson's specialty?
- Leif Johnson is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Leif Johnson located?
- Leif Johnson's practice location on file with NPPES is 2070 Clinton Ave, Alameda, CA 94501-4320.
- What is Leif Johnson's phone number?
- The practice phone number listed in the NPPES registry for Leif Johnson is (510) 523-4357.
- Does Leif Johnson accept Medicare?
- Leif Johnson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Leif Johnson's NPI active?
- Yes — Leif Johnson's NPI (1851314611) is active in the NPPES registry as of the last update on 2019-08-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.