Doctor profile · Federal record
Dr. Nancy Sun, M.D.
Emergency Medicine Physician (CMS: Emergency Medicine) · Simi Valley, CA
- NPI 1821146051
- Accepts Medicare
- MIPS 77.7 / 100 · 2023
- 26 yrs in practice
- Female
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
2975 Sycamore Dr
Simi Valley, CA 930651201
(805) 955-6107
fax (805) 527-9374 - Mailing address
-
Po Box 660446
Arcadia, CA 910660446
Credentials & registration
- NPI registered
- January 2007 — 19 yrs on file
- Profile last updated
- January 28, 2020
- Year of graduation
- 2000 — 26 yrs since
- Specialty taxonomy
- 207P00000X — NUCC code
- State license (1)
- California #A98171
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1821146051. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,494
Distinct HCPCS
7
Medicare allowed
$138,086
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
93010 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 496 | 450 | $9 | |
99285 |
Emergency department visit with high level of medical decision making | 401 | 379 | $181 | |
93042 |
Electrocardiogram (ecg) 1 to 3 leads with review by physician only | 253 | 247 | $7 | |
99291 |
Critical care, first 30-74 minutes | 174 | 166 | $223 | |
99284 |
Emergency department visit with moderate level of medical decision making | 126 | 122 | $125 | |
99283 |
Emergency department visit with low level of medical decision making | 28 | 28 | $74 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 16 | 16 | $183 |
In context: peer comparison
Among 5 peers in this city , average services per provider: 120. This provider delivers 12× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
219
Patients
213
Total drug cost
$1,588
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Ondansetron Odt (Ondansetron) | Brand | 41 | 40 | $291 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 40 | 37 | $170 |
| Azithromycin | Generic | 26 | 26 | $144 |
| Cefuroxime (Cefuroxime Axetil) | Brand | 21 | 20 | $363 |
| Prednisone | Generic | 20 | 20 | $43 |
| Cephalexin | Generic | 16 | 16 | $179 |
| Cyclobenzaprine Hcl | Generic | 16 | 16 | $110 |
| Sulfamethoxazole-Trimethoprim (Sulfamethoxazole/Trimethoprim) | Brand | 14 | 14 | $109 |
| Pantoprazole Sodium | Generic | 13 | 12 | $99 |
| Metronidazole | Generic | 12 | 12 | $80 |
Hospital affiliations
Frequently asked questions
What is Dr. Nancy Sun's medical specialty?
Dr. Nancy Sun practices Emergency Medicine Physician in Simi Valley, CA.
Where does Dr. Nancy Sun practice?
Dr. Nancy Sun practices at 2975 Sycamore Dr, Simi Valley, CA 930651201. Office phone: 8059556107.
What is Dr. Nancy Sun's NPI?
Dr. Nancy Sun's National Provider Identifier (NPI) is 1821146051, issued by NPPES.
Does Dr. Nancy Sun accept Medicare assignment?
Yes. Dr. Nancy Sun accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Nancy Sun commonly perform?
Top Medicare-reported procedures in 2023: Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (HCPCS 93010); Emergency department visit with high level of medical decision making (HCPCS 99285); Electrocardiogram (ecg) 1 to 3 leads with review by physician only (HCPCS 93042). Source: CMS Medicare Physician & Other Practitioners file.