Richard Harland Guth, M.D
Emergency Medicine Physician · Riverside, CA
Richard Harland Guth, M.D is an emergency medicine physician with a practice address in Riverside, California, and NPI 1154437325, issued on Aug 21, 2006. Check the license (California G28728, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Richard Harland Guth
- Credential
- M.D
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- G28728 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4445 Magnolia Ave, Riverside, CA 92501
- Phone
- (909) 788-3000
- Enumerated
- Aug 21, 2006
- Record last updated
- May 10, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicaid ID
- 00G287280 CA
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 4445 Magnolia Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Alyssa Aboff, CRNA, DNPCertified Registered Nurse Anesthetist1760133292
- Brandon Abrajan, DOStudent in an Organized Health Care Education/Training Program1861141186
Verify Richard Harland Guth in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G28728Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
68% fewer Medicare Part D claims than the average emergency medicine physician in 2024
72 Medicare Part D claims, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Latanoprost14 claims
- Irbesartan13 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.
Richard Harland Guth among 7,751 emergency medicine physician records in California
Richard Harland Guth, M.D 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 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 60% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2011 · 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 Riverside → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Jason An, M.D.Riverside, CA 925011851533905
- Ryan Brenchley, M.D.Riverside, CA 925011154437390
- Eugene Chan, M.D.Riverside, CA 925011952414674
- Kenneth Dale, D.ORiverside, CA 925011932158771
- Roberta Dunn-Dixon, M.D.Riverside, CA 925011548448970
- Michael Kang, M.D.Riverside, CA 925011124294517
- James Kim, M.DRiverside, CA 925011861508038
- Edward Magee, MD, MPHRiverside, CA 925011851698880
Common questions
What is Richard Harland Guth, M.D's NPI number?
Richard Harland Guth, M.D's National Provider Identifier (NPI) is 1154437325, issued on Aug 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Richard Harland Guth, M.D located?
The NPPES record lists a practice address at 4445 Magnolia Ave, Riverside, CA, 92501. Phone: (909) 788-3000. Providers update this record themselves, so call before visiting.
How can I verify Richard Harland Guth, M.D's license?
NPPES lists California license number G28728, 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 Richard Harland Guth, M.D prescribe under Medicare Part D?
In 2024, Richard Harland Guth, M.D had 72 Medicare Part D claims; 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.