Michael William Johnson, M.D.
Family Medicine Physician · Valencia, CA
Michael William Johnson, M.D. is a family medicine physician with a practice address in Valencia, California, and NPI 1275590267, issued on Apr 26, 2006. Check the license (California G063669, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael William Johnson
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G063669 CA
Self-reported in NPPES; status is on the state search - Practice location
- 23501 Cinema Dr Ste 100, Valencia, CA 91355
- Phone
- (661) 367-9200
- Enumerated
- Apr 26, 2006
- Record last updated
- Dec 26, 2025
- Medicare enrollment
- Enrolled (PECOS I20120123000437); accepts Medicare assignment
- Medical or professional school
- Virginia Commonwealth University, School Of Medicine, 1987
- 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 23501 Cinema Dr Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Taura Olfus, DOFamily Medicine Physician1902816903
Verify Michael William Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G063669Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
64% more Medicare Part D claims than the average family medicine physician in 2024
5,827 Medicare Part D claims for 471 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 107 claims were for opioids.
Most prescribed
- Atorvastatin Calcium543 claims
- Amlodipine Besylate347 claims
- Losartan Potassium257 claims
- Lisinopril192 claims
- Levothyroxine Sodium175 claims
- Metformin Hcl153 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
- Healthcare Partners Affiliates Medical GroupMission Hills, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael William Johnson among 17,133 family medicine physician records in California
Michael William Johnson, M.D. 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
- Graduated1987 · median 2005 among the 10,652 with a school on file
- Record last updated2025 · 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).
40 family medicine physician records list a practice address in Valencia
They are 40 of the 2,083 NPPES records with a practice address in Valencia, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Valencia → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Brian Downs, D.O.Valencia, CA 913551881795631
- Giovinetza Hasbun, M.D.Valencia, CA 913551255353496
- Richard Kim, M.D.Valencia, CA 913551366427510
- Dennis Lewis, MDValencia, CA 913551780608190
- Geoffrey Lloyd, D.O.Valencia, CA 913551821104845
- Heather Mullen, MD, MSJSanta Clarita, CA 913551720185382
- Jeffrey Nordella, M.D.Valencia, CA 913551487755419
- Taura Olfus, DOValencia, CA 913551902816903
Common questions
What is Michael William Johnson, M.D.'s NPI number?
Michael William Johnson, M.D.'s National Provider Identifier (NPI) is 1275590267, issued on Apr 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael William Johnson, M.D. located?
The NPPES record lists a practice address at 23501 Cinema Dr Ste 100, Valencia, CA, 91355. Phone: (661) 367-9200. Providers update this record themselves, so call before visiting.
How can I verify Michael William Johnson, M.D.'s license?
NPPES lists California license number G063669, 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 Michael William Johnson, M.D. prescribe under Medicare Part D?
In 2024, Michael William Johnson, M.D. had 5,827 Medicare Part D claims for 471 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.