Are you Marissa A. Ontis, FNP-C? This profile is yours to edit: update your address, phone, photo and services.
Edit this profileAt a glance
- 1 Memorial Dr # G181, Alton, IL 62002
About Marissa Ontis
Marissa A. Ontis, FNP-C is a nurse practitioner — family practicing in Alton, IL. Medicare claims data shows Marissa provided 1,244 services to 635 patients. The services billed most often include removal of fingernails or toenails, 6 or more nails, removal of fingernails or toenails, 6 or more nails, and established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more. This provider record is associated with NPI 1629704929.
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
- (618) 433-7066
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
1 MEMORIAL DR # G181
Alton, IL 62002
Conditions and Services Within This Provider's Scope
Within Nurse Practitioner - Family 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
Most searched conditions
Allergies
Allergy & skin
Blood disorders
Bone & joint
Dermatology
Digestive
Digestive health
Eye conditions
Heart health
Hormones & endocrine
Infections
Men's health
Mental health
Metabolic & weight
Nerve & joint
Nerve & spine
Neurological
Pain
Pain & spine
Pediatric infections
Respiratory
Skin
Sleep
Urinary health
Women's health
Procedures & services
Chronic condition care
- Chronic disease management visit
- Diabetic Foot Care
Dermatology
Diagnostic screening
Evaluation & Testing
Hormones & endocrine
Injury care
Lab tests
- COVID-19 testing
- Cholesterol screening
- Hemoglobin A1c Test
- Rapid strep testing
- Thyroid Blood Test
- Urine Drug Screen
Mental health
Minor procedures
- Burn and Wound Care
- Superficial foreign-body removal
- Incision and drainage of an abscess
- Ingrown toenail removal
Minor surgery
Physical exams
Prescriptions
Preventative care
Preventative exams
Sexual health
Skin procedures
Sleep
Urgent care
Weight management
Women's health
- IUD insertion and removal
- Pregnancy Confirmation Test
- Birth control counseling
- Contraceptive implant insertion and removal
- Pap smear
- Well-woman exam
Most searched procedures
Allergies
Diagnostic tests
Ear, nose & throat
- Earwax removal
Heart health
- EKG
Injections
Lifestyle counseling
Neurological care
Occupational health
Pain management
Respiratory care
Screenings
Procedures Most Often Billed to Medicare
1,244 services · 635 patients · 7 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Removal of fingernails or toenails, 6 or more nails | Procedure | 11721 |
876 | More than most peers in Nurse Practitioner, Family |
| Removal of fingernails or toenails, 6 or more nails | Procedure | 11721 |
150 | More than most peers in Nurse Practitioner, Family |
| Removal of skin and tissue, 20.0 sq cm or less | Procedure | 11042 |
24 | Less often than most peers in Nurse Practitioner, Family |
| Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more | Office visit | 99212 |
70 | More often than most peers in Nurse Practitioner, Family |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
50 | More often than most peers in Nurse Practitioner, Family |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
41 | As often as other peers in Nurse Practitioner, Family |
| Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes | Office visit | 99305 |
33 | As often as other peers in Nurse Practitioner, Family |
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 nurse practitioners at this location 3
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 5
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 — 31 related providers in 4 groups
Other nurse practitioners in Alton 7
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2022 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Removal of fingernails or toenails, 6 or more nails 8
Providers in IL who bill this service to Medicare most often.
Common questions
What does Marissa A. Ontis specialize in?
Marissa A. Ontis is a nurse practitioner in Alton, IL. That is the designation recorded for this NPI in the federal registry, where it is listed as “Nurse Practitioner — Family”.
NPI registry
Where is Marissa A. Ontis located?
Marissa A. Ontis is listed at 1 Memorial Dr # G181, Alton, IL 62002. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Marissa A. Ontis's phone number?
The number on file is (618) 433-7066. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Marissa A. Ontis?
Marissa A. Ontis's National Provider Identifier is 1629704929. 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 Marissa A. Ontis train?
Marissa A. Ontis attended Other, graduating in 2022. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Marissa A. Ontis have?
Marissa A. Ontis has 4 years experience. Calculated from a graduation year of 2022, reported in the CMS National Downloadable File.
CMS public data
What does Marissa A. Ontis do most often?
According to Medicare billing data, Marissa A. Ontis performs procedures including removal of fingernails or toenails, 6 or more nails and removal of skin and tissue, 20.0 sq cm or less, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Marissa A. Ontis's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Marissa A. Ontis. If this is you, claiming it is free.
Guide.md
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