Doctor profile · Federal record
Dr. Lonnie Seo
Emergency Medicine Physician (CMS: Emergency Medicine) · Student in an Organized Health Care Education/Training Program · New Haven, CT
- NPI 1740785211
- Accepts Medicare
- 8 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
464 Congress Ave Ste 260
New Haven, CT 065191362
(203) 737-2644 - Additional location
-
1 Hospital Plz
Stamford, CT 069023602
(201) 658-2042
Credentials & registration
- NPI registered
- March 2018 — 8 yrs on file
- Profile last updated
- April 14, 2022
- Year of graduation
- 2018 — 8 yrs since
- Specialty taxonomy
- 207P00000X — NUCC code
- State license (1)
- Connecticut #67025
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1740785211. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
711
Distinct HCPCS
8
Medicare allowed
$118,110
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99285 |
Emergency department visit with high level of medical decision making | 254 | 243 | $179 | |
99291 |
Critical care, first 30-74 minutes | 205 | 200 | $217 | |
99284 |
Emergency department visit with moderate level of medical decision making | 154 | 145 | $124 | |
99283 |
Emergency department visit with low level of medical decision making | 22 | 22 | $74 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 21 | 21 | $138 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 20 | 20 | $86 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 18 | 18 | $68 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 17 | 17 | $101 |
In context: peer comparison
Among 76 peers in New Haven Emergency Medicine Physician, average services per provider: 72. This provider delivers 9.9× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
130
Patients
130
Total drug cost
$952
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Cephalexin | Generic | 46 | 46 | $479 |
| Prednisone | Generic | 16 | 16 | $36 |
| Sulfamethoxazole-Trimethoprim (Sulfamethoxazole/Trimethoprim) | Brand | 15 | 15 | $76 |
| Amoxicillin-Clavulanate Potass (Amoxicillin/Potassium Clav) | Brand | 14 | 14 | $189 |
| Azithromycin | Generic | 14 | 14 | $59 |
| Ondansetron Odt (Ondansetron) | Brand | 14 | 14 | $85 |
| Oxycodone Hcl | Generic | 11 | 11 | $29 |
Hospital affiliations
Frequently asked questions
What is Dr. Lonnie Seo's medical specialty?
Dr. Lonnie Seo practices Emergency Medicine Physician in New Haven, CT.
Where does Dr. Lonnie Seo practice?
Dr. Lonnie Seo practices at 464 Congress Ave Ste 260, New Haven, CT 065191362. Office phone: 2037372644.
What is Dr. Lonnie Seo's NPI?
Dr. Lonnie Seo's National Provider Identifier (NPI) is 1740785211, issued by NPPES.
Does Dr. Lonnie Seo accept Medicare assignment?
Yes. Dr. Lonnie Seo accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Lonnie Seo commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with high level of medical decision making (HCPCS 99285); Critical care (HCPCS 99291); Emergency department visit with moderate level of medical decision making (HCPCS 99284). Source: CMS Medicare Physician & Other Practitioners file.