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Edit this profileWhere to find Ngassa A. Mssika, DO
- Oshkosh location main office
855 N Westhaven Dr, Oshkosh, WI 54904 - Green Bay location
164 N Broadway, Green Bay, WI 54303 - Rice Lake location
1700 W Stout St, Rice Lake, WI 54868
About Dr. Mssika
Based in Oshkosh, WI, Ngassa A. Mssika, DO is listed in the NPI registry under emergency medicine. Medicare claims data shows Ngassa provided 453 services to 420 patients. The services billed most often include emergency department visit with moderate level of medical decision making, routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only, and emergency department visit with low level of medical decision making. NPI 1932410461 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (920) 303-8700
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
855 N WESTHAVEN DR
Oshkosh, WI 54904
164 N Broadway
Green Bay, WI 54303
1700 W Stout St
Rice Lake, WI 54868
Conditions Commonly Evaluated or Treated
Within Emergency Medicine generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Bites & Stings
Brain & Nerves
- Delirium
- Stroke
- Fainting and syncope
- Seizure in Child
- Severe headache or sudden migraine
- Status epilepticus
- Transient ischemic attack
Endocrine & Metabolic
Eye Care
Injuries & Trauma
- Animal or dog bite
- Bone fractures
- Deep cut or wound
- Dislocated joint
- Severe burn
- Sprains and muscle strains
- Traumatic brain injury
Rashes & allergy
Skin & Infections
Urinary & Bladder
Women's Health
Abdomen & Digestion
Allergy & Immune
Allergy & Immunology
Blood & Circulation
Breathing
Digestion & Stomach
Ear, Nose & Throat
Environmental
Eye Emergency
General Emergency
Heart & Chest
Heart & Circulation
Heart & Lungs
Infections & Illness
Lungs & Breathing
Men's Health
Poisoning & Environmental
Poisoning & Toxins
Spine & Back
Urinary & Kidney
Procedures & services
Abdominal Procedures
Breathing & Airway
Critical Care
- Central line placement
- Chest tube insertion
- CPR and defibrillation
- Blood transfusion
Diagnostic testing
Diagnostics
Ear, Nose & Throat
Eye & ENT
Heart & Diagnostics
Imaging & Diagnostics
Injections & Vaccines
Kidney Care
Lung & Respiratory
Medications
Mental Health
Minor Procedures
- Nasal cautery for nosebleeds
- Tick Removal
- Urinary catheter insertion
- Fishhook or embedded splinter removal
- Incision and drainage of an abscess
Minor Trauma
Orthopedics
Poisoning & Toxicology
Specialized Care
Stroke & Vascular
Toxicology
Women's Health
Wound Care
- Burn dressing and care
- Skin glue for cuts
- Stitches and Laceration Repair
- Wound cleaning and debridement
- Wound stapling
Airway & Breathing
Anesthesia & Sedation
Digestive Care
Eye Care
Heart Care
Orthopedic Procedures
Supportive Care
Procedures Most Often Billed to Medicare
453 services · 420 patients · 5 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | Treatment | 93010 |
176 | More often than most peers in Emergency Medicine |
| Emergency department visit with moderate level of medical decision making | Office visit | 99284 |
202 | More than most peers in Emergency Medicine |
| Emergency department visit with low level of medical decision making | Office visit | 99283 |
31 | More often than most peers in Emergency Medicine |
| Emergency department visit with high level of medical decision making | Office visit | 99285 |
23 | Less often than most peers in Emergency Medicine |
| Critical care, first 30-74 minutes | Office visit | 99291 |
21 | Less often than most peers in Emergency Medicine |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other emergency physicians at this location 5
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 3
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 27 related providers in 4 groups
Other emergency physicians in Oshkosh 3
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2020 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 8
Providers in WI who bill this service to Medicare most often.
Common questions
What does Dr. Mssika specialize in?
Dr. Mssika is an emergency physician in Oshkosh, WI. That is the designation recorded for this NPI in the federal registry, where it is listed as “Emergency Medicine”.
NPI registry
Where is Dr. Mssika located?
Dr. Mssika is listed at 855 N Westhaven Dr, Oshkosh, WI 54904. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Mssika's phone number?
The number on file is (920) 303-8700. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Dr. Mssika?
Dr. Mssika's National Provider Identifier is 1932410461. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Mssika go to medical school?
Dr. Mssika attended Other, graduating in 2020. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Mssika have?
Dr. Mssika has 6 years experience. Calculated from a graduation year of 2020, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Mssika do most often?
According to Medicare billing data, Dr. Mssika provides treatments such as routine electrocardiogram using at least 12 leads with interpretation and report only, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Mssika's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Mssika. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.