Mladen Jecmenica, M.D.
Gastroenterology Physician · Corona, CA
Mladen Jecmenica, M.D. is a gastroenterology physician with a practice address in Corona, California, and NPI 1619102837, issued on May 18, 2009. Check the license (California MD449785, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mladen Jecmenica
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- MD449785 CA
MD449785 PA
Self-reported in NPPES; status is on the state search - Practice location
- 2097 Compton Ave Ste 103, Corona, CA 92881
- Phone
- (951) 934-0505
- Enumerated
- May 18, 2009
- Record last updated
- Mar 17, 2026
- Fax
- (951) 934-0505
- Medicare enrollment
- Enrolled (PECOS I20210810003745); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 2097 Compton Ave Ste 103
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jocelyn Do, NP-CFamily Nurse Practitioner1740724962
- Jenna Eugenio, P.A.Medical Physician Assistant1558668772
- M. Mazen Jamal, M.D., M.P.H.Gastroenterology Physician1003916727
- Karen ThaiPhysician Assistant1730927377
- Bao-Khoi VuPhysician Assistant1689132474
Verify Mladen Jecmenica in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license MD449785Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
50% fewer Medicare Part D claims than the average gastroenterology physician in 2024
403 Medicare Part D claims for 230 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.
Most prescribed
- Gavilyte-G96 claims
- Omeprazole79 claims
- Peg-3350 And Electrolytes49 claims
- Pantoprazole Sodium40 claims
- Sod Sulf-Potass Sulf-Mag Sulf17 claims
- Famotidine14 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.
Industry payments in 2024: $40.51
2 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- MJ Medical Group,inc.Corona, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mladen Jecmenica among 2,140 gastroenterology physician records in California
Mladen Jecmenica, M.D. is one of 2,140 gastroenterology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 69% of them.
- NPI issued2009 · 69% of these records are older, 28% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2003 · median 2002 among the 1,538 with a school on file
- Record last updated2026 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in California
There are 2,140 gastroenterology physician records in California.
All 2,140 in California → Every provider in Corona → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- M. Mazen Jamal, M.D., M.P.H.Corona, CA 928811003916727
- Marco Paez, M.D.Corona, CA 928821902167695
- Omar Shahbaz, M.D., M.S.Corona, CA 928821417226366
- David Chapman, M.D.Yorba Linda, CA 928861053321943
- Tahmina Haq, M.D.Yorba Linda, CA 928861538332853
- Hyder Jamal, MDYorba Linda, CA 928861740280932
- Andrew Ko, M.D.Yorba Linda, CA 928861437170990
- Keith Martin, M.D.Yorba Linda, CA 928861649280546
Common questions
What is Mladen Jecmenica, M.D.'s NPI number?
Mladen Jecmenica, M.D.'s National Provider Identifier (NPI) is 1619102837, issued on May 18, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Mladen Jecmenica, M.D. located?
The NPPES record lists a practice address at 2097 Compton Ave Ste 103, Corona, CA, 92881. Phone: (951) 934-0505. Providers update this record themselves, so call before visiting.
How can I verify Mladen Jecmenica, M.D.'s license?
NPPES lists California license number MD449785, 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 Mladen Jecmenica, M.D. prescribe under Medicare Part D?
In 2024, Mladen Jecmenica, M.D. had 403 Medicare Part D claims for 230 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.