Ngassa Mssika, DO
NPI 1932410461 · Emergency Medicine Physician · Oshkosh, WI
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ngassa Mssika, DO is a Emergency Medicine Physician provider in Oshkosh, WI (NPI 1932410461).
Provider details
- NPI number
- 1932410461
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 81255 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
15 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
453 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 202 | $109 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 176 | $7 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 31 | $65 |
| Emergency Department Visit With High Level of Medical Decision Making99285 | 23 | $159 |
| Critical Care, First 30-74 Minutes99291 | 21 | $191 |
Typical Medicare-allowed amounts for these services range $7–$191 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tramadol Hcl | 38 | 38 |
| Cephalexin | 34 | 34 |
| Ondansetronbrand: Ondansetron Odt | 31 | 31 |
| Prednisone | 25 | 25 |
| Doxycycline Monohydrate | 24 | 23 |
| Methylprednisolone | 22 | 22 |
| Naproxen | 20 | 20 |
| Hydrocodone/Acetaminophen |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$86 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 164 N BroadwayGreen Bay, WI 54303-2728Phone: (920) 490-9046
- 1700 W Stout StRice Lake, WI 54868-5000Phone: (715) 387-5511
Registry dates
- Enumerated
- 2010-06-30
- Last updated
- 2026-01-08
- Certified
- 2026-01-08
Frequently asked questions
- What is Ngassa Mssika's NPI number?
- Ngassa Mssika's National Provider Identifier (NPI) is 1932410461, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ngassa Mssika's specialty?
- Ngassa Mssika is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ngassa Mssika located?
- Ngassa Mssika's practice location on file with NPPES is 855 N Westhaven Dr, Oshkosh, WI 54904-7668.
- What is Ngassa Mssika's phone number?
- The practice phone number listed in the NPPES registry for Ngassa Mssika is (920) 303-8700.
- Does Ngassa Mssika accept Medicare?
- Ngassa Mssika is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ngassa Mssika's NPI active?
- Yes — Ngassa Mssika's NPI (1932410461) is active in the NPPES registry as of the last update on 2026-01-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.