Ismail Deniz, MD
Psychiatry Physician · Irvine, CA
Ismail Deniz, MD is a psychiatry physician with a practice address in Irvine, California, and NPI 1619437704, issued on Mar 23, 2019. Check the license (California 194547, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ismail Deniz
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 194547 CA
Self-reported in NPPES; status is on the state search - Practice location
- 15615 Alton Pkwy Ste 220, Irvine, CA 92618
- Phone
- (949) 665-9136
- Enumerated
- Mar 23, 2019
- Record last updated
- Jul 14, 2025
- Fax
- (310) 912-6743
- Medicare enrollment
- Enrolled (PECOS I20251107000118); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 15615 Alton Pkwy Ste 220
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Niva Berman, LCSWClinical Social Worker1891586145
- Amy BloodPsychiatry Physician1003208570
- May Christine Faustino, PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1992525463
- Gayane NurijanyanClinical Psychologist1447609276
- Vanessa Smucny, APRN, PMHNPPsychiatric/Mental Health Nurse Practitioner1841171022
- Debra Sweeney, PMHNP-BCPsychiatric/Mental Health Registered Nurse1912889452
Verify Ismail Deniz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 194547Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average psychiatry physician in 2024
147 Medicare Part D claims for 16 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Most prescribed
- Lurasidone Hcl16 claims
- Bupropion Xl15 claims
- Quetiapine Fumarate12 claims
- Clonazepam11 claims
- Paroxetine Hcl11 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
- Hiawatha Harris MD Inc.Oakland, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ismail Deniz among 8,673 psychiatry physician records in California
Ismail Deniz, MD is one of 8,673 psychiatry physician records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 85% of them.
- NPI issued2019 · 85% of these records are older, 13% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 38% of these records are
- Graduated2013 · median 2005 among the 3,295 with a school on file
- Record last updated2025 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
54 psychiatry physician records list a practice address in Irvine
They are 54 of the 7,778 NPPES records with a practice address in Irvine, and 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Irvine → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Kamal Artin, M.D.Irvine, CA 926181285876813
- Amy BloodIrvine, CA 926181003208570
- Harold Boerlin, M.D.Irvine, CA 926181043441090
- Ravindra Chand, M.D.Irvine, CA 926181013099951
- Samuel Fesenmeier, DOIrvine, CA 926181952860587
- Emily Johnson, M.D.Irvine, CA 926181063590438
- Aaron Neustadt, M.D.Irvine, CA 926181295980605
- Amelia Russo-Neustadt, M.D., PH.D.Irvine, CA 926181003268020
Common questions
What is Ismail Deniz, MD's NPI number?
Ismail Deniz, MD's National Provider Identifier (NPI) is 1619437704, issued on Mar 23, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Ismail Deniz, MD located?
The NPPES record lists a practice address at 15615 Alton Pkwy Ste 220, Irvine, CA, 92618. Phone: (949) 665-9136. Providers update this record themselves, so call before visiting.
How can I verify Ismail Deniz, MD's license?
NPPES lists California license number 194547, 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 Ismail Deniz, MD prescribe under Medicare Part D?
In 2024, Ismail Deniz, MD had 147 Medicare Part D claims for 16 beneficiaries; the average among psychiatry physician prescribers was 1,000. 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.