Malcolm Johnson, MD
NPI 1003830316 · Emergency Medicine Physician · Walnut Creek, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Malcolm Johnson, MD is a Emergency Medicine Physician provider in Walnut Creek, CA (NPI 1003830316).
Provider details
- NPI number
- 1003830316
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD00046336 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
789 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 | 276 | $194 |
| Removal of Skin and Tissue, 20.0 Sq Cm Or Less11042 | 109 | $69 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 90 | $134 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 80 | $108 |
| Critical Care, First 30-74 Minutes99291 | 72 | $243 |
| Removal of Skin and Tissue, Each Additional 20.0 Sq Cm Or Less11045 | 69 | $27 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 23 | 23 |
| Acetaminophen With Codeinebrand: Acetaminophen-Codeine | 18 | 18 |
| Cephalexin | 15 | 15 |
| Ibuprofen | 15 | 15 |
| Gentamicin Sulfate | 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 (1)
- 1321 Colby AveEverett, WA 98201-1665Phone: (425) 261-2000
Registry dates
- Enumerated
- 2006-07-27
- Last updated
- 2019-01-21
Frequently asked questions
- What is Malcolm Johnson's NPI number?
- Malcolm Johnson's National Provider Identifier (NPI) is 1003830316, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Malcolm Johnson's specialty?
- Malcolm Johnson is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Malcolm Johnson located?
- Malcolm Johnson's practice location on file with NPPES is 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598-3122.
- What is Malcolm Johnson's phone number?
- The practice phone number listed in the NPPES registry for Malcolm Johnson is (925) 939-3000.
- Does Malcolm Johnson accept Medicare?
- Malcolm Johnson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Malcolm Johnson's NPI active?
- Yes — Malcolm Johnson's NPI (1003830316) is active in the NPPES registry as of the last update on 2019-01-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.