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WARREN PHILIP JOHNSON MD
NPI 1558521682
Emergency Medicine in Fort Irwin, CA

Active since June 12, 2008PECOS EnrolledAccepts Medicare Assignment
WEED ARMY COMMUNITY HOSPITAL BLDG 166, FORT IRWIN, CA 92310(760) 380-9407 Get Directions Write a Review

NPPES record last updated: June 14, 2018. Verified against the NPPES registry weekly; last sync: November 08, 2026.

About Warren Philip Johnson Md NPPES

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

WARREN PHILIP JOHNSON MD (NPI 1558521682) is an individual emergency medicine provider in Fort Irwin, California, licensed in Oregon (MD187425) and active in the NPI registry since June 2008. He is enrolled in Medicare PECOS, is affiliated with Legacy Salmon Creek Medical Center, and is a graduate of Other (2008).

NPPES Registry Identity

NPI1558521682
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameWARREN PHILIP JOHNSONCredential: MD
Location AddressWEED ARMY COMMUNITY HOSPITAL BLDG 166Fort Irwin, CA 92310
Mailing AddressWeed Army Community Hospital Bldg 166Fort Irwin, CA 92310 · (760) 380-5388 · Fax (760) 380-2122
Phone(760) 380-9407
Sole ProprietorYes
Medical School CMSOtherGraduated 2008
Enumeration DateJune 12, 2008
Last NPPES UpdateJune 14, 2018
✔ NPI 1558521682 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
Licenses✔ Licensed in OR · MD187425✔ Licensed in CA · A117174
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
WEED ARMY COMMUNITY HOSPITAL BLDG 166, Fort Irwin, CA 92310
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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

Warren Philip Johnson Md 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 ID1951571066
PECOS Enrollment IDI20190523001208
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 Reassignments

2

Medicare enrollment records show Warren Johnson reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Cep America LLC
604 mi
Emergency Medicine
351 SW 9TH ST
Ontario, OR 97914
  • Reassigned Medicare billing, Oregon enrollment
  • 167 clinicians in this Medicare group
NPI 1790209898 (541) 881-7000
Northwest Acute Care Specialists PC
774 mi
Emergency Medicine
101 SW MAIN ST STE 940
Portland, OR 97204
  • Reassigned Medicare billing, Washington enrollment
  • 108 clinicians in this Medicare group
NPI 1215983200 (503) 464-9034

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

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
234 services230 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
134 services124 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
48 services46 patients
Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
46 services46 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Legacy Salmon Creek Medical Center

Acute Care Hospitals · Vancouver, WA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number500150
Location2211 NE 139th StreetVancouver, WA 98686 · Clark County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92310 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
$91.88 typical visit price
range $59.60 – $179.42
Typical copayment $22.97 (range $14.90 – $44.85)
Most-billed visit code 99203
Established Patient
$104.64 typical visit price
range $19.37 – $146.42
Typical copayment $26.16 (range $4.84 – $36.60)
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.

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 Warren Johnson's NPI number?

The NPI number for Warren Johnson is 1558521682. It was assigned to this individual provider in the NPPES registry on June 12, 2008.

Where is Warren Johnson located?

Warren Johnson practices at Weed Army Community Hospital Bldg 166, Fort Irwin, CA 92310. The listed phone number is (760) 380-9407.

What is Warren Johnson's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Warren Johnson enrolled in Medicare?

Yes. Warren 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 organizations bill Medicare for Warren Johnson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Warren Johnson reassigns Medicare benefits to 2 organizations: Cep America LLC (Ontario, OR) and Northwest Acute Care Specialists PC (Portland, OR). Each 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 Warren Johnson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Warren Johnson affiliated with any hospitals?

According to CMS data, Warren Johnson is affiliated with Legacy Salmon Creek Medical Center.

When was this NPI record last updated?

The NPPES record for Warren Johnson was last updated on June 14, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 years 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.