Warren Philip Johnson, MD
Emergency Medicine Physician · Fort Irwin, CA
Warren Philip Johnson, MD is an emergency medicine physician with a practice address in Fort Irwin, California, and NPI 1558521682, issued on Jun 12, 2008. Check the license (California A117174, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Warren Philip Johnson
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- A117174 CA
MD187425 OR
Self-reported in NPPES; status is on the state search - Practice location
- Weed Army Community Hospital Bldg 166, Fort Irwin, CA 92310
- Phone
- (760) 380-9407
- Enumerated
- Jun 12, 2008
- Record last updated
- Jun 14, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20190523001208); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Verify Warren Philip Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A117174Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
53% more Medicare Part D claims than the average emergency medicine physician in 2024
345 Medicare Part D claims for 220 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 37 claims were for opioids.
Most prescribed
- Ondansetron Odt38 claims
- Levofloxacin34 claims
- Oxycodone Hcl27 claims
- Cephalexin21 claims
- Cyclobenzaprine Hcl21 claims
- Doxycycline Hyclate19 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
- Northwest Acute Care Specialists PCVancouver, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Warren Philip Johnson among 7,751 emergency medicine physician records in California
Warren Philip Johnson, MD is one of 7,751 emergency 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 2008, is newer than 50% of them.
- NPI issued2008 · 50% of these records are older, 46% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2008 · median 2011 among the 4,560 with a school on file
- Record last updated2018 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Fort Irwin → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Adam Duncan, DOFt Irwin, CA 923101619433430
- Kihyun Kim, D.O.Fort Irwin, CA 923101689637506
- Nader Abas, MDBarstow, CA 923111346288305
- Michael Manolescu, M.D.Barstow, CA 923111124072509
- Jose Bueno, M.D.Apple Valley, CA 923081386730760
- Stephen Anderson, M.DApple Valley, CA 923071659554194
- David Baum, M.D.Apple Valley, CA 923071992749790
- Franz Bolowich, D.OApple Valley, CA 923071982648846
Common questions
What is Warren Philip Johnson, MD's NPI number?
Warren Philip Johnson, MD's National Provider Identifier (NPI) is 1558521682, issued on Jun 12, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Warren Philip Johnson, MD located?
The NPPES record lists a practice address at Weed Army Community Hospital Bldg 166, Fort Irwin, CA, 92310. Phone: (760) 380-9407. Providers update this record themselves, so call before visiting.
How can I verify Warren Philip Johnson, MD's license?
NPPES lists California license number A117174, 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 Warren Philip Johnson, MD prescribe under Medicare Part D?
In 2024, Warren Philip Johnson, MD had 345 Medicare Part D claims for 220 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.