Doctor profile · Federal record
Dr. Ngassa Mssika, DO
Emergency Medicine Physician (CMS: Emergency Medicine) · Oshkosh, WI
- NPI 1932410461
- Accepts Medicare
- MIPS 95.4 / 100 · 2023
- 6 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 3 locations .
- Primary practice
-
855 N Westhaven Dr
Oshkosh, WI 549047668
(920) 303-8700 - Additional location
-
164 N Broadway
Green Bay, WI 543032728
(920) 490-9046 - Additional location
-
1700 W Stout St
Rice Lake, WI 548685000
(715) 387-5511 - Mailing address
-
Po Box 735044
Chicago, IL 606735044
Credentials & registration
- NPI registered
- June 2010 — 16 yrs on file
- Profile last updated
- January 8, 2026
- Year of graduation
- 2020 — 6 yrs since
- Specialty taxonomy
- 207P00000X — NUCC code
- State license (1)
- Wisconsin #81255
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1932410461. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
134
Distinct HCPCS
3
Medicare allowed
$9,564
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99284 |
Emergency department visit with moderate level of medical decision making | 61 | 60 | $112 | |
93010 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 58 | 51 | $8 | |
99285 |
Emergency department visit with high level of medical decision making | 15 | 14 | $152 |
In context: peer comparison
Among 10 peers in this city , average services per provider: 58. This provider delivers 2.3× the peer median.Open Payments
Industry payments received
All-time total
$86
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Amgen Inc. | 1 | $85.93 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
49
Patients
49
Total drug cost
$282
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Cephalexin | Generic | 25 | 25 | $186 |
| Naproxen | Generic | 12 | 12 | $35 |
| Ondansetron Odt (Ondansetron) | Brand | 12 | 12 | $62 |
Hospital affiliations
Frequently asked questions
What is Dr. Ngassa Mssika's medical specialty?
Dr. Ngassa Mssika practices Emergency Medicine Physician in Oshkosh, WI.
Where does Dr. Ngassa Mssika practice?
Dr. Ngassa Mssika practices at 855 N Westhaven Dr, Oshkosh, WI 549047668. Office phone: 9203038700.
What is Dr. Ngassa Mssika's NPI?
Dr. Ngassa Mssika's National Provider Identifier (NPI) is 1932410461, issued by NPPES.
Does Dr. Ngassa Mssika accept Medicare assignment?
Yes. Dr. Ngassa Mssika accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Ngassa Mssika commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with moderate level of medical decision making (HCPCS 99284); 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). Source: CMS Medicare Physician & Other Practitioners file.