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DR. KARLON HOWARD JOHNSON M.D.
NPI 1144325473
Family Medicine in Hawthorne, CA

Active since September 13, 2006PECOS EnrolledAccepts Medicare Assignment
4455 W 117TH ST STE 300, HAWTHORNE, CA 90250(310) 645-0444 Get Directions Write a Review

NPPES record last updated: January 15, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Karlon Howard Johnson M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. KARLON HOWARD JOHNSON M.D. (NPI 1144325473) is an individual family medicine provider in Hawthorne, California, licensed in California (G70613) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS and is a graduate of Howard University College Of Medicine (1989).

NPPES Registry Identity

NPI1144325473
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameDR. KARLON HOWARD JOHNSONCredential: M.D.
Location Address4455 W 117TH ST STE 300Hawthorne, CA 90250-2240
Mailing Address4455 W 117th St Ste 300Hawthorne, CA 90250-2240 · (310) 645-0444
Phone(310) 645-0444
Sole ProprietorNo
Medical School CMSHoward University College Of MedicineGraduated 1989
Enumeration DateSeptember 13, 2006
Last NPPES UpdateJanuary 15, 2026
NPPES CertifiedJanuary 15, 2026
✔ NPI 1144325473 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in CA · G70613
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
4455 W 117TH ST STE 300, Hawthorne, CA 90250
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Other Identifiers 1

Medicaid00G706130CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Karlon Howard Johnson M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5092706184
PECOS Enrollment IDI20040518001602
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Karlon Johnson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Northeast Community Clinic
Same address
Federally Qualified Health Center (FQHC)
4455 W. 117TH ST SUITE 105
Hawthorne, CA 90250
  • Reassigned Medicare billing, California enrollment
  • 45 clinicians in this Medicare group
NPI 1275226334 (424) 456-6200

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90250 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$96.36 typical visit price
range $62.96 – $187.60
Typical copayment $24.09 (range $15.74 – $46.90)
Most-billed visit code 99203
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
13 suppliers27 claims76 services$5.66 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
8 suppliers11 claims21 services$1.13 avg. paid by Medicare
Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553
DME-Other DME · category DE017N
2 suppliers23 claims23 services$199.74 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 12

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MRS. LUZ MERY SARRIA RN NP
Nurse Practitioner (Obstetrics & Gynecology)
4455 W 117TH ST STE 300
HAWTHORNE, CA 90250
Los Angeles County (310) 645-0444
MRS. MELISSA NATASHA MYLES PA-C
Physician Assistant
4455 W 117TH ST STE 300
HAWTHORNE, CA 90250
Los Angeles County (310) 645-0444
LIEN MY PHAM PA-C
Physician Assistant
4455 W 117TH ST STE 300
HAWTHORNE, CA 90250
Los Angeles County (310) 645-0444
DR. AZADEH SALAMI MD
Pediatrics
4455 W 117TH ST STE 300
HAWTHORNE, CA 90250
Los Angeles County (310) 645-0444
CAITLIN OUTLAND PA-C
Physician Assistant (Medical)
4455 W 117TH ST STE 300
HAWTHORNE, CA 90250
Los Angeles County (310) 645-0444
MISS JULIA CATHERINE BREWER NP
Nurse Practitioner
4455 W 117TH ST STE 300
HAWTHORNE, CA 90250
Los Angeles County (310) 645-0444
DR. NGAN-THUY D PHAM M.D.
Pediatrics
4455 W 117TH ST STE 300
HAWTHORNE, CA 90250
Los Angeles County (310) 645-0444
ALIZA GONZALEZ
Social Worker
4455 W 117TH ST STE 300
HAWTHORNE, CA 90250
Los Angeles County (424) 236-4800

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Karlon Johnson's NPI number?

The NPI number for Karlon Johnson is 1144325473. It was assigned to this individual provider in the NPPES registry on September 13, 2006.

Where is Karlon Johnson located?

Karlon Johnson practices at 4455 W 117th St Ste 300, Hawthorne, CA 90250. The listed phone number is (310) 645-0444.

What is Karlon Johnson's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Karlon Johnson enrolled in Medicare?

Yes. Karlon Johnson is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Karlon Johnson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Karlon Johnson reassigns Medicare benefits to Northeast Community Clinic (Hawthorne, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Karlon Johnson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Karlon Johnson was last updated on January 15, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.