Karlon Howard Johnson, M.D.
Family Medicine Physician · Hawthorne, CA
Karlon Howard Johnson, M.D. is a family medicine physician with a practice address in Hawthorne, California, and NPI 1144325473, issued on Sep 13, 2006. Check the license (California G70613, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Karlon Howard Johnson
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G70613 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4455 W 117TH St Ste 300, Hawthorne, CA 90250
- Phone
- (310) 645-0444
- Enumerated
- Sep 13, 2006
- Record last updated
- Jan 15, 2026
- Medicaid ID
- 00G706130 CA
- Medicare enrollment
- Enrolled (PECOS I20040518001602); accepts Medicare assignment
- Medical or professional school
- Howard University College Of Medicine, 1989
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 4455 W 117TH St Ste 300
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Julia Brewer, NPNurse Practitioner1578995502
- Jennifer Chiu, M.D.Internal Medicine Physician1962528430
- Aliza GonzalezSocial Worker1780215988
- Melissa Myles, PA-CPhysician Assistant1215130356
- Caitlin Outland, PA-CMedical Physician Assistant1508246067
- Lien Pham, PA-CPhysician Assistant1215319546
Verify Karlon Howard Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G70613Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
9% more Medicare Part D claims than the average family medicine physician in 2024
3,865 Medicare Part D claims for 281 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Amlodipine Besylate260 claims
- Atorvastatin Calcium212 claims
- Losartan Potassium180 claims
- Gabapentin177 claims
- Metformin Hcl139 claims
- Albuterol Sulfate Hfa132 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
- Northeast Community ClinicHawthorne, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karlon Howard Johnson among 17,133 family medicine physician records in California
Karlon Howard 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
- Graduated1989 · median 2005 among the 10,652 with a school on file
- Record last updated2026 · 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).
20 family medicine physician records list a practice address in Hawthorne
They are 20 of the 818 NPPES records with a practice address in Hawthorne, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Hawthorne → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Jennifer Chan, M.D.Hawthorne, CA 902501396756102
- Thomas Duralde, MDHawthorne, CA 902501982644043
- Michael Genova, M.D.Hawthorne, CA 902501376579227
- Khang Hoang, D.O.Hawthorne, CA 902501952397937
- Bernard Hunt, D.O.Hawthorne, CA 902501942256136
- Terry Ishihara, MDHawthorne, CA 902501609856939
- Khalid Khan, M.D.Hawthorne, CA 902501063440840
- Lieu Nguyen, M.D.Hawthorne, CA 902501841214285
Common questions
What is Karlon Howard Johnson, M.D.'s NPI number?
Karlon Howard Johnson, M.D.'s National Provider Identifier (NPI) is 1144325473, issued on Sep 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karlon Howard Johnson, M.D. located?
The NPPES record lists a practice address at 4455 W 117TH St Ste 300, Hawthorne, CA, 90250. Phone: (310) 645-0444. Providers update this record themselves, so call before visiting.
How can I verify Karlon Howard Johnson, M.D.'s license?
NPPES lists California license number G70613, 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 Karlon Howard Johnson, M.D. prescribe under Medicare Part D?
In 2024, Karlon Howard Johnson, M.D. had 3,865 Medicare Part D claims for 281 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.