Doctor profile · Federal record
Dr. Ellen Gim, MD
Internal Medicine Physician (CMS: Internal Medicine) · Fountain Valley, CA
- NPI 1861596223
- Accepts Medicare
- MIPS 75.3 / 100 · 2023
- 37 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
17360 Brookhurst St
Fountain Valley, CA 927083720
(714) 665-1797
fax (714) 665-4680 - Additional location
-
17 Skygate
Aliso Viejo, CA 92656
(949) 943-2671
Credentials & registration
- NPI registered
- September 2006 — 20 yrs on file
- Profile last updated
- March 17, 2018
- Year of graduation
- 1989 — 37 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #G071544
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1861596223. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
787
Distinct HCPCS
7
Medicare allowed
$94,504
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 296 | 145 | $127 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 221 | 105 | $85 | |
99239 |
Hospital discharge day management, more than 30 minutes | 116 | 113 | $124 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 106 | 104 | $186 | |
99497 |
Advance care planning, first 30 minutes | 20 | 16 | $81 | |
99231 |
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 16 | 12 | $53 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 12 | 12 | $139 |
In context: peer comparison
Among 36 peers in Fountain Valley Internal Medicine Physician, average services per provider: 345. This provider delivers 2.3× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
26
Patients
25
Total drug cost
$173
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 15 | 14 | $96 |
| Levofloxacin | Generic | 11 | 11 | $78 |
Frequently asked questions
What is Dr. Ellen Gim's medical specialty?
Dr. Ellen Gim practices Internal Medicine Physician in Fountain Valley, CA.
Where does Dr. Ellen Gim practice?
Dr. Ellen Gim practices at 17360 Brookhurst St, Fountain Valley, CA 927083720. Office phone: 7146651797.
What is Dr. Ellen Gim's NPI?
Dr. Ellen Gim's National Provider Identifier (NPI) is 1861596223, issued by NPPES.
Does Dr. Ellen Gim accept Medicare assignment?
Yes. Dr. Ellen Gim accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Ellen Gim commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Hospital discharge day management (HCPCS 99239). Source: CMS Medicare Physician & Other Practitioners file.