Doctor profile · Federal record
Dr. Christianna Sim, MD
Emergency Medicine Physician · Santa Monica, CA
- NPI 1396235743
- 8 yrs on file
- Female
- Group practice
- No sanctions
Practice & contact
Operates at 3 locations .
- Primary practice
-
1250 16Th St
Santa Monica, CA 904041249
(310) 794-0585 - Additional location
-
450 Clarkson Ave
Brooklyn, NY 112032012
(718) 270-6315 - Additional location
-
300 Pasteur Dr
Stanford, CA 943052200
(650) 723-4000 - Mailing address
-
5767 W Century Blvd Ste 400
Los Angeles, CA 900455631
Credentials & registration
- NPI registered
- May 2018 — 8 yrs on file
- Profile last updated
- August 29, 2025
- Specialty taxonomy
- 207P00000X — NUCC code
- State license (1)
- California #A185926
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1396235743. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
108
Distinct HCPCS
2
Medicare allowed
$18,768
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99285 |
Emergency department visit with high level of medical decision making | 79 | 78 | $190 | |
99284 |
Emergency department visit with moderate level of medical decision making | 29 | 29 | $131 |
In context: peer comparison
Among 21 peers in this city , average services per provider: 107. This provider delivers 1.0× the peer median.Frequently asked questions
What is Dr. Christianna Sim's medical specialty?
Dr. Christianna Sim practices Emergency Medicine Physician in Santa Monica, CA.
Where does Dr. Christianna Sim practice?
Dr. Christianna Sim practices at 1250 16Th St, Santa Monica, CA 904041249. Office phone: 3107940585.
What is Dr. Christianna Sim's NPI?
Dr. Christianna Sim's National Provider Identifier (NPI) is 1396235743, issued by NPPES.
What procedures does Dr. Christianna Sim commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with high level of medical decision making (HCPCS 99285); Emergency department visit with moderate level of medical decision making (HCPCS 99284). Source: CMS Medicare Physician & Other Practitioners file.