NGASSA A MSSIKA DO
NPI 1932410461
Emergency Medicine in Oshkosh, WI

Q: What is Ngassa Mssika's NPI number?

The NPI number for Ngassa Mssika is 1932410461. It was assigned to this individual provider in the NPPES registry on June 30, 2010.

Q: What is Ngassa Mssika's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Q: When was this NPI record last updated?

The NPPES record for Ngassa Mssika was last updated on January 8, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since June 30, 2010PECOS EnrolledAccepts Medicare Assignment

100/100

CMS Quality Rating

855 N WESTHAVEN DR, OSHKOSH, WI 54904(920) 303-8700 Get Directions Write a Review

NPPES record last updated: January 8, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jan 8, 2026, Oct 23, 2023, Sep 6, 2023 (3 updates tracked since 2023).

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About Ngassa A Mssika Do NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

NGASSA A MSSIKA DO (NPI 1932410461) is an individual emergency medicine provider in Oshkosh, Wisconsin, licensed in Wisconsin (81255) and active in the NPI registry since June 2010. He is enrolled in Medicare PECOS, is affiliated with Marshfield Medical Center - Rice Lake, and is a graduate of Other (2020).

NPPES Registry Identity

NPI1932410461

Entity TypeIndividualMale

Primary Taxonomy207P00000X

Provider Legal NameNGASSA A MSSIKACredential: DO

Location Address855 N WESTHAVEN DROshkosh, WI 54904-7668

Mailing AddressPo Box 735044Chicago, IL 60673-5044 · (920) 303-8700

Phone(920) 303-8700

Sole ProprietorNo

Medical School CMSOtherGraduated 2020

Enumeration DateJune 30, 2010

Last NPPES UpdateJanuary 8, 20263 updates tracked since enumeration

NPPES CertifiedJanuary 8, 2026

✔ NPI 1932410461 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207P00000X

License✔ Licensed in WI · 81255

Definition

An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.

855 N WESTHAVEN DR, Oshkosh, WI 54904

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include CareSource (Common Ground Healthcare), Medica, Sanford Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Ngassa A Mssika Do is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5991984189

PECOS Enrollment IDI20231018002782

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 5

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Emergency department visit with moderate level of medical decision making 99284

An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.

202 services192 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010

A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.

176 services155 patients

Emergency department visit with low level of medical decision making 99283

An emergency department visit for a problem of moderate severity involves immediate medical attention for issues like minor fractures, burns, or high fever. The healthcare team will assess your condition, provide necessary treatment, and may suggest further tests or admission if required.

31 services31 patients

Emergency department visit with high level of medical decision making 99285

An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.

23 services22 patients

Critical care, first 30-74 minutes 99291

Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.

21 services20 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Marshfield Medical Center - Rice Lake

Acute Care Hospitals · Rice Lake, WI

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number520011

Location1700 West Stout StreetRice Lake, WI 54868 · Barron County

Emergency services Birthing friendly

Bay Area Medical Center

Acute Care Hospitals · Marinette, WI

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number520113

Location3003 University DrMarinette, WI 54143 · Marinette County

Emergency services Birthing friendly

Aurora Medical Ctr Oshkosh

Acute Care Hospitals · Oshkosh, WI

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number520198

Location855 N Westhaven DriveOshkosh, WI 54904 · Winnebago County

Emergency services Birthing friendly

Marshfield Medical Center - Weston

Acute Care Hospitals · Weston, WI

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number520202

Location3400 Ministry ParkwayWeston, WI 54476 · Marathon County

Emergency services Birthing friendly

Marshfield Medical Center - Minocqua

Acute Care Hospitals · Minocqua, WI

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number520212

Location9576 Highway 70Minocqua, WI 54548 · Oneida County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 54904 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$82.92 typical visit price

range $53.90 – $163.24

Typical copayment $20.73 (range $13.47 – $40.81)

Most-billed visit code 99203

Established Patient

$95.41 typical visit price

range $17.40 – $133.76

Typical copayment $23.85 (range $4.35 – $33.44)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

100/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored through an Alternative Payment Model

Quality

90.76

Promoting Interoperability

100

Improvement Activities

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JACQUELINE ANN OTS PENDING

Nurse Practitioner