Doctor profile · Federal record
Dr. Ismanie Guillaume, M.D.
Internal Medicine Physician (CMS: Internal Medicine) · Pediatrics Physician · Newark, DE
- NPI 1326571126
- Accepts Medicare
- 9 yrs in practice
- Female
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
4755 Ogletown Stanton RD
Newark, DE 197182200
(908) 977-7695
Credentials & registration
- NPI registered
- April 2017 — 9 yrs on file
- Profile last updated
- June 25, 2021
- Year of graduation
- 2017 — 9 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Delaware #C1-0024308
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1326571126. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
886
Distinct HCPCS
6
Medicare allowed
$80,605
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 618 | 274 | $80 | |
99239 |
Hospital discharge day management, more than 30 minutes | 113 | 109 | $116 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 87 | 85 | $130 | |
99238 |
Hospital discharge day management, 30 minutes or less | 40 | 40 | $79 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 17 | 17 | $175 | |
99221 |
Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes | 11 | 11 | $85 |
In context: peer comparison
Among 75 peers in Newark Internal Medicine Physician, average services per provider: 140. This provider delivers 6.3× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
119
Patients
94
Total drug cost
$13,852
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Prednisone | Generic | 24 | 24 | $58 |
| Eliquis (Apixaban) | Brand | 20 | 13 | $12,237 |
| Cefpodoxime Proxetil | Generic | 18 | 18 | $1,082 |
| Atorvastatin Calcium | Generic | 15 | 0 | $194 |
| Omeprazole | Generic | 15 | 12 | $192 |
| Doxycycline Hyclate | Generic | 14 | 14 | $47 |
| Oxycodone Hcl | Generic | 13 | 13 | $41 |
Hospital affiliations
Frequently asked questions
What is Dr. Ismanie Guillaume's medical specialty?
Dr. Ismanie Guillaume practices Internal Medicine Physician in Newark, DE.
Where does Dr. Ismanie Guillaume practice?
Dr. Ismanie Guillaume practices at 4755 Ogletown Stanton RD, Newark, DE 197182200. Office phone: 9089777695.
What is Dr. Ismanie Guillaume's NPI?
Dr. Ismanie Guillaume's National Provider Identifier (NPI) is 1326571126, issued by NPPES.
Does Dr. Ismanie Guillaume accept Medicare assignment?
Yes. Dr. Ismanie Guillaume accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Ismanie Guillaume commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Hospital discharge day management (HCPCS 99239); Initial hospital care with straightforward or low-level medical decision making (HCPCS 99222). Source: CMS Medicare Physician & Other Practitioners file.