Malcolm C. Johnson, MD
Emergency Medicine Physician · Walnut Creek, CA
Malcolm C. Johnson, MD is an emergency medicine physician with a practice address in Walnut Creek, California, and NPI 1003830316, issued on Jul 27, 2006. Check the license (California A94962, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Malcolm C. Johnson
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- A94962 CA
MD00046336 WA
Self-reported in NPPES; status is on the state search - Practice location
- 1601 Ygnacio Valley RD, Walnut Creek, CA 94598
- Phone
- (925) 939-3000
- Enumerated
- Jul 27, 2006
- Record last updated
- Jan 21, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicaid ID
- 00A949620 CA
- Medicare enrollment
- Enrolled (PECOS I20070607000180); accepts Medicare assignment
- Medical or professional school
- University Of Wisconsin School Of Medicine, 2000
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 1601 Ygnacio Valley RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Malcolm C. Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A94962Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
29% fewer Medicare Part D claims than the average emergency medicine physician in 2024
161 Medicare Part D claims for 111 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 28 claims were for opioids.
Most prescribed
- Prednisone23 claims
- Acetaminophen-Codeine18 claims
- Cephalexin15 claims
- Ibuprofen15 claims
- Gentamicin Sulfate12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 94.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- Cep America - Auc PCWalnut Creek, CA
- Medamerica Physician Solutions PCWalnut Creek, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Malcolm C. Johnson among 7,751 emergency medicine physician records in California
Malcolm C. Johnson, MD is one of 7,751 emergency medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 60% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2000 · median 2011 among the 4,560 with a school on file
- Record last updated2019 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
95 emergency medicine physician records list a practice address in Walnut Creek
They are 95 of the 6,170 NPPES records with a practice address in Walnut Creek, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Walnut Creek → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- David Birdsall, M.D.Walnut Creek, CA 945981164445615
- Daniel Buhler, M.D.Walnut Creek, CA 945981710908983
- Timothy Drazek, M.D.Walnut Creek, CA 945981336155795
- Paul Freitas, M.D.Walnut Creek, CA 945981558385641
- Alice Hunter, M.D.Walnut Creek, CA 945981023032125
- Andrew Kives, M.D.Walnut Creek, CA 945981972524007
- Theodore Kloth, M.D.Walnut Creek, CA 945981043234065
- Theophile Koury, M.D.Walnut Creek, CA 945981568483691
Common questions
What is Malcolm C. Johnson, MD's NPI number?
Malcolm C. Johnson, MD's National Provider Identifier (NPI) is 1003830316, issued on Jul 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Malcolm C. Johnson, MD located?
The NPPES record lists a practice address at 1601 Ygnacio Valley RD, Walnut Creek, CA, 94598. Phone: (925) 939-3000. Providers update this record themselves, so call before visiting.
How can I verify Malcolm C. Johnson, MD's license?
NPPES lists California license number A94962, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Malcolm C. Johnson, MD prescribe under Medicare Part D?
In 2024, Malcolm C. Johnson, MD had 161 Medicare Part D claims for 111 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Malcolm C. Johnson, MD's MIPS final score?
The 2023 MIPS final score is 94.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.