Doctor profile · Federal record
Dr. Yesim Yilmaz Demirdag, M.D.
Allergy & Immunology Physician (CMS: Allergy/Immunology) · Irvine, CA
- NPI 1134330921
- Accepts Medicare
- MIPS 91.2 / 100 · 2023
- 36 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
821 Health Sciences RD Medical Sciences I C-240
Irvine, CA 926979214
(949) 824-5818 - Mailing address
-
Po Box 9214, West Virginia University
Morgantown, WV 265069214
Credentials & registration
- NPI registered
- May 2007 — 19 yrs on file
- Profile last updated
- August 27, 2020
- Year of graduation
- 1990 — 36 yrs since
- Specialty taxonomy
- 207K00000X — NUCC code
- State license (1)
- California #C166841
- Medicaid
- LA #07225
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1134330921. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
563
Distinct HCPCS
10
Medicare allowed
$43,284
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
95004 |
Test for allergy using allergenic extract | 203 | 11 | $5 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 97 | 71 | $105 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 73 | 57 | $151 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 47 | 33 | $103 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 29 | 26 | $70 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 24 | 24 | $143 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 20 | 17 | $154 | |
95076 |
Test for allergy using ingested items, initial 2 hours | 18 | 18 | $79 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 18 | 18 | $194 | |
94016 |
Test to measure expiratory airflow and volume initiated by patient and evaluated by provider | 17 | 16 | $26 |
In context: peer comparison
Among 3 peers in Irvine Allergy & Immunology Physician, average services per provider: 51. This provider delivers 11× the peer median.Open Payments
Industry payments received
All-time total
$3,090
Transactions
9
Manufacturers
5
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Csl Behring | 3 | $2,768.05 | |
| Grifols USA, LLC | 1 | $167.42 | |
| Regeneron Healthcare Solutions, INC. | 3 | $109.36 | |
| Genentech USA, INC. | 1 | $23.21 | |
| Pharming Healthcare, INC. | 1 | $21.95 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
505
Patients
85
Total drug cost
$665,731
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Fluticasone Propionate | Generic | 92 | 31 | $2,170 |
| Azelastine Hcl | Generic | 48 | 20 | $2,028 |
| Incruse Ellipta (Umeclidinium Bromide) | Brand | 36 | 0 | $13,984 |
| Olopatadine Hcl | Generic | 34 | 0 | $3,691 |
| Xolair (Omalizumab) | Brand | 34 | 0 | $76,845 |
| Ipratropium Bromide | Generic | 32 | 14 | $2,147 |
| Dupixent Pen (Dupilumab) | Brand | 31 | 0 | $121,656 |
| Hizentra (Immun Glob G(Igg)/Pro/Iga 0-50) | Brand | 31 | 0 | $316,133 |
| Montelukast Sodium | Generic | 30 | 0 | $722 |
| Dupixent Syringe (Dupilumab) | Brand | 27 | 0 | $102,893 |
Frequently asked questions
What is Dr. Yesim Yilmaz Demirdag's medical specialty?
Dr. Yesim Yilmaz Demirdag practices Allergy & Immunology Physician in Irvine, CA.
Where does Dr. Yesim Yilmaz Demirdag practice?
Dr. Yesim Yilmaz Demirdag practices at 821 Health Sciences RD Medical Sciences I C-240, Irvine, CA 926979214. Office phone: 9498245818.
What is Dr. Yesim Yilmaz Demirdag's NPI?
Dr. Yesim Yilmaz Demirdag's National Provider Identifier (NPI) is 1134330921, issued by NPPES.
Does Dr. Yesim Yilmaz Demirdag accept Medicare assignment?
Yes. Dr. Yesim Yilmaz Demirdag accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Yesim Yilmaz Demirdag commonly perform?
Top Medicare-reported procedures in 2023: Test for allergy using allergenic extract (HCPCS 95004); Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99215). Source: CMS Medicare Physician & Other Practitioners file.