Christopher David Johnson, M.D.
Emergency Medicine Physician · Hayward, CA
Christopher David Johnson, M.D. is an emergency medicine physician with a practice address in Hayward, California, and NPI 1720285620, issued on Jul 3, 2007. Check the license (California A115329, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Christopher David Johnson
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A115329 CA
Self-reported in NPPES; status is on the state search - Practice location
- 27400 Hesperian Blvd, Hayward, CA 94545
- Phone
- (646) 468-9164
- Enumerated
- Jul 3, 2007
- Record last updated
- Dec 15, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20110830000378); accepts Medicare assignment
- Medical or professional school
- New York University School Of Medicine, 2007
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 27400 Hesperian Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Eric Anderson, MDEmergency Medicine Physician1417035262
- Joel Angel, M.D.Hospitalist Physician1669644571
- Marc Anker, MDObstetrics & Gynecology Physician1376621128
Verify Christopher David Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A115329Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
51% fewer Medicare Part D claims than the average emergency medicine physician in 2024
110 Medicare Part D claims for 71 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 18 claims were for opioids.
Most prescribed
- Ondansetron Odt11 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.
Bills Medicare through one group practice
- Permanente Medical Group IncRichmond, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Christopher David Johnson among 7,751 emergency medicine physician records in California
Christopher David Johnson, M.D. 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 2007, is newer than 40% of them.
- NPI issued2007 · 40% of these records are older, 50% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2007 · median 2011 among the 4,560 with a school on file
- Record last updated2021 · 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).
26 emergency medicine physician records list a practice address in Hayward
They are 26 of the 3,993 NPPES records with a practice address in Hayward, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Hayward → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Lyn Aborn, MDHayward, CA 945451891873659
- Eric Anderson, MDHayward, CA 945451417035262
- Robert Blum, MDHayward, CA 945451730267592
- Jeremy Graff, M.DHayward, CA 945451669491429
- Shao-I Huang, D.O.Hayward, CA 945451215031455
- Tan Nguyen, M.D.Hayward, CA 945451437173754
- Aaron Pessl, M.D.Hayward, CA 945451063425072
- Lisa Pinsky, MDHayward, CA 945451831277680
Common questions
What is Christopher David Johnson, M.D.'s NPI number?
Christopher David Johnson, M.D.'s National Provider Identifier (NPI) is 1720285620, issued on Jul 3, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Christopher David Johnson, M.D. located?
The NPPES record lists a practice address at 27400 Hesperian Blvd, Hayward, CA, 94545. Phone: (646) 468-9164. Providers update this record themselves, so call before visiting.
How can I verify Christopher David Johnson, M.D.'s license?
NPPES lists California license number A115329, 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 Christopher David Johnson, M.D. prescribe under Medicare Part D?
In 2024, Christopher David Johnson, M.D. had 110 Medicare Part D claims for 71 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
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.