Derek Johnson, D.O.
Family Medicine Physician · Brentwood, CA
Derek Johnson, D.O. is a family medicine physician with a practice address in Brentwood, California, and NPI 1407876063, issued on Jul 19, 2006. Check the license (California 20A8220, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Derek Johnson
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A8220 CA
Self-reported in NPPES; status is on the state search - Practice location
- 350 John Muir Pkwy Ste 105, Brentwood, CA 94513
- Phone
- (925) 513-2483
- Enumerated
- Jul 19, 2006
- Record last updated
- Mar 7, 2023
- Fax
- (925) 513-4957
- Medicaid ID
- 00AX82200 CA
- Medicare enrollment
- Enrolled (PECOS I20041020000719); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 350 John Muir Pkwy Ste 105
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Krishna Bhaskarabhatla, MDFamily Medicine Physician1689621849
- Brenda Chuksorji, MDFamily Medicine Physician1043879281
- Marissa Opilas, D.O.Family Medicine Physician1457701302
- Richard Singer, MDPediatrics Physician1578648804
Verify Derek Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A8220Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
57% fewer Medicare Part D claims than the average family medicine physician in 2024
1,521 Medicare Part D claims for 151 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 60 claims were for opioids.
Most prescribed
- Atorvastatin Calcium168 claims
- Levothyroxine Sodium94 claims
- Amlodipine Besylate68 claims
- Pantoprazole Sodium66 claims
- Metformin Hcl56 claims
- Escitalopram Oxalate49 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
- Sutter Bay Medical FoundationOrinda, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Derek Johnson among 17,133 family medicine physician records in California
Derek Johnson, D.O. is one of 17,133 family 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 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2001 · median 2005 among the 10,652 with a school on file
- Record last updated2023 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
19 family medicine physician records list a practice address in Brentwood
They are 19 of the 1,212 NPPES records with a practice address in Brentwood, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Brentwood → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Krishna Bhaskarabhatla, MDBrentwood, CA 945131689621849
- Scott Bledsoe, D.O.Brentwood, CA 945131275587586
- Nilima Desai, M.D.Brentwood, CA 945131801094834
- Teginder Dhanoa, M.D.Brentwood, CA 945131801915830
- Lance Gibson, M.D.Brentwood, CA 945131962427633
- Michelle HolmesBrentwood, CA 945131720145626
- Adric Huynh, B.S.,M.S.,M.D.Brentwood, CA 945131760687107
- Surinder Kohal, M.D.Brentwood, CA 945131699766915
Common questions
What is Derek Johnson, D.O.'s NPI number?
Derek Johnson, D.O.'s National Provider Identifier (NPI) is 1407876063, issued on Jul 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Derek Johnson, D.O. located?
The NPPES record lists a practice address at 350 John Muir Pkwy Ste 105, Brentwood, CA, 94513. Phone: (925) 513-2483. Providers update this record themselves, so call before visiting.
How can I verify Derek Johnson, D.O.'s license?
NPPES lists California license number 20A8220, 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 Derek Johnson, D.O. prescribe under Medicare Part D?
In 2024, Derek Johnson, D.O. had 1,521 Medicare Part D claims for 151 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.