Tyler Ronnfeldt, MD
Emergency Medicine Physician · Glendale, CA
Tyler Ronnfeldt, MD is an emergency medicine physician with a practice address in Glendale, California, and NPI 1083134878, issued on Jun 22, 2017. Check the license (California C202338, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Tyler Ronnfeldt
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- C202338 CA
MD231257 OR
Self-reported in NPPES; status is on the state search - Practice location
- 1812 Verdugo Blvd, Glendale, CA 91208
- Phone
- (818) 790-7100
- Enumerated
- Jun 22, 2017
- Record last updated
- Jul 8, 2026
- Medicare enrollment
- Enrolled (PECOS I20250701004024); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 1812 Verdugo Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Harry Ahn, MDFamily Medicine Physician1730492000
- Inessa Artsrunyan, NPAcute Care Nurse Practitioner1093117079
- Yan Bai, NPFamily Nurse Practitioner1558612804
Verify Tyler Ronnfeldt in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C202338Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
18% fewer Medicare Part D claims than the average emergency medicine physician in 2024
185 Medicare Part D claims for 137 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 11 claims were for opioids.
Most prescribed
- Doxycycline Hyclate24 claims
- Prednisone19 claims
- Amoxicillin-Clavulanate Potass14 claims
- Cefdinir13 claims
- Cephalexin11 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.
2 hospitals and group practices
- Methodist Fremont HealthFremont, NE · Acute Care Hospitals2 of 5 stars
- Usc Care Medical Group IncLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Tyler Ronnfeldt among 7,751 emergency medicine physician records in California
Tyler Ronnfeldt, 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 2017, is newer than 78% of them.
- NPI issued2017 · 78% of these records are older, 19% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2017 · median 2011 among the 4,560 with a school on file
- Record last updated2026 · 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).
55 emergency medicine physician records list a practice address in Glendale
They are 55 of the 4,742 NPPES records with a practice address in Glendale, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Glendale → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Leo Berkenbile, MDGlendale, CA 912081518090760
- Kristin Berona, M.D.Glendale, CA 912081801121751
- Elizabeth Burner, M.D.Glendale, CA 912081376781724
- Armand Dorian, MDGlendale, CA 912081215961966
- Kelly Katzberg, M.D.Glendale, CA 912081205018231
- Bill Khoury, M.D.Glendale, CA 912081003868027
- Michael Levine, M.D.Glendale, CA 912081447348370
- Maria Montoya, M.D.Glendale, CA 912081528002458
Common questions
What is Tyler Ronnfeldt, MD's NPI number?
Tyler Ronnfeldt, MD's National Provider Identifier (NPI) is 1083134878, issued on Jun 22, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Tyler Ronnfeldt, MD located?
The NPPES record lists a practice address at 1812 Verdugo Blvd, Glendale, CA, 91208. Phone: (818) 790-7100. Providers update this record themselves, so call before visiting.
How can I verify Tyler Ronnfeldt, MD's license?
NPPES lists California license number C202338, 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 Tyler Ronnfeldt, MD prescribe under Medicare Part D?
In 2024, Tyler Ronnfeldt, MD had 185 Medicare Part D claims for 137 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.