MARY WITHOELTER NURSE PRACTITIONER
NPI 1982188389
Nurse Practitioner in Ofallon, MO

Q: What is Mary Withoelter's NPI number?

The NPI number for Mary Withoelter is 1982188389. It was assigned to this individual provider in the NPPES registry on September 20, 2018.

Q: What is Mary Withoelter's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Q: When was this NPI record last updated?

The NPPES record for Mary Withoelter was last updated on September 18, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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 September 20, 2018PECOS EnrolledAccepts Medicare Assignment

54.72/100

CMS Quality Rating

2630 STATE HIGHWAY K, OFALLON, MO 63368(636) 980-5300(636) 980-5344 Get Directions Write a Review

NPPES record last updated: September 18, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 18, 2025, Apr 8, 2025, Apr 3, 2020 and 1 more (4 updates tracked since 2018).

On this page

About Mary Withoelter Nurse Practitioner NPPES

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

MARY WITHOELTER NURSE PRACTITIONER (NPI 1982188389) is an individual nurse practitioner in Ofallon, Missouri, licensed in Missouri (2019033706) and active in the NPI registry since September 2018. She is enrolled in Medicare PECOS, maintains a secondary practice location in Saint Louis, and is a graduate of Other (2018).

NPPES Registry Identity

NPI1982188389

Entity TypeIndividualFemale

Primary Taxonomy363L00000X

Provider Legal NameMARY WITHOELTERCredential: NURSE PRACTITIONER

Location Address2630 STATE HIGHWAY KOfallon, MO 63368

Mailing AddressPo Box 959354Saint Louis, MO 63195-9354 · (636) 980-5300 · Fax (636) 980-5344

Phone(636) 980-5300

Fax(636) 980-5344

Sole ProprietorNo

Medical School CMSOtherGraduated 2018

Enumeration DateSeptember 20, 2018

Last NPPES UpdateSeptember 18, 20254 updates tracked since enumeration

NPPES CertifiedSeptember 18, 2025

✔ NPI 1982188389 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363L00000X

License✔ Licensed in MO · 2019033706

Definition

(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.

Also ListedNurse Practitioner · FamilyTaxonomy 363LF0000X · License 2019033706 (MO)

2630 STATE HIGHWAY K, Ofallon, MO 63368

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Secondary Practice Location 1

Location 19556 Manchester RdSaint Louis, MO 63119-1313 · Phone (314) 373-5740

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mary Withoelter Nurse Practitioner 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 ID1456699651

PECOS Enrollment IDI20200316000939

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.

Medicare Billing Reassignments

Medicare enrollment records show Mary Withoelter reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Physician Groups Lc

28 mi

Multi-Specialty

670 MASON RIDGE CENTER DR STE 300
Saint Louis, MO 63141

Reassigned Medicare billing, Missouri enrollment
611 clinicians in this Medicare group

NPI 1285664268 (314) 996-7644

Total Access Urgent Care, PC

34 mi

Urgent Care

9556 MANCHESTER RD
Saint Louis, MO 63119

Reassigned Medicare billing, Missouri enrollment
111 clinicians in this Medicare group

NPI 1962684886 (314) 961-2255

Ut Regional One Physicians Inc

256 mi

Surgery

877 JEFFERSON AVE
Memphis, TN 38103

Reassigned Medicare billing, Tennessee enrollment
421 clinicians in this Medicare group

NPI 1093130585 (901) 545-8336

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 28

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.

Injection, dexamethasone sodium phosphate, 1 mg J1100

Dexamethasone sodium phosphate is a medication given via injection. It is a type of steroid that helps reduce inflammation and immune responses. It can be used to treat a variety of conditions, such as allergies, skin conditions, arthritis, and more.

384 services52 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

99 services99 patients

Detection test by nucleic acid for multiple types influenza virus 87502

A detection test by nucleic acid for multiple types of influenza virus is a diagnostic procedure. It identifies the genetic material of the virus in your body. It's highly accurate and can distinguish between different flu strains, helping in prompt and precise treatment.

66 services66 patients

Amplifed dna or rna probe detection of severe acute respiratory syndrome coronavirus 2 (covid-19) antigen 87635

This is a lab test that detects the presence of COVID-19 in your body. It uses a technique to amplify the virus's genetic material, either DNA or RNA, making it easier to identify. A positive result indicates an active infection.

66 services66 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

59 services58 patients

Injection of drug or substance under skin or into muscle 96372

This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.

55 services50 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

50 services50 patients

X-ray of chest, 2 views 71046

A chest X-ray, 2 views, is a quick, painless test that creates pictures of the structures inside your chest, such as your heart, lungs, and blood vessels. Two different angles are used to get a comprehensive view. This helps in diagnosing conditions like pneumonia, heart problems, or lung cancer.

45 services44 patients

Automated urinalysis test 81003

An automated urinalysis test is a routine examination that checks your urine for various substances. It can help identify potential health issues such as kidney problems or diabetes. The test uses a machine to analyze a small urine sample, providing quick and accurate results.

45 services45 patients

Blood test panel for electrolytes (sodium potassium, chloride, carbon dioxide) 80051

A blood test panel for electrolytes checks the levels of sodium, potassium, chloride, and carbon dioxide in your blood. These elements are crucial for body functions such as maintaining fluid balance, muscle contractions, and heart rhythm. The test helps identify any imbalances.

37 services36 patients

Blood count, hemoglobin 85018

A blood count, specifically hemoglobin, is a standard test that measures the amount of hemoglobin in your blood. Hemoglobin is a protein in red blood cells that carries oxygen throughout your body. This test helps assess your overall health and detect a variety of disorders such as anemia or polycythemia.

37 services37 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

36 services36 patients

Creatine kinase (cardiac enzyme) level, total 82550

The total Creatine Kinase (CK) level test is a blood test that helps assess the health of your heart. It measures an enzyme called CK that's released into the bloodstream when heart or other muscle tissue is damaged. High levels may indicate a heart attack or muscle disorder.

34 services33 patients

Blood creatinine level 82565

A blood creatinine level test measures the amount of creatinine in your blood. Creatinine is a waste product that your body produces when it uses energy. High levels may indicate that your kidneys aren't working properly. This test is often used to monitor kidney health.

33 services32 patients

Urea nitrogen level to assess kidney function, quantitative 84520

The urea nitrogen level test is a routine blood test that checks the amount of urea nitrogen in your blood to evaluate how well your kidneys are working. If the levels are higher than normal, it may indicate that your kidneys are not functioning properly.

31 services31 patients

Detection test by nucleic acid for strep (streptococcus, group a), amplified probe technique 87651

This test detects Group A Streptococcus bacteria in your body. It uses an amplified probe technique, which amplifies the bacteria's nucleic acid, making it easier to identify. This test helps diagnose conditions like strep throat or scarlet fever.

30 services30 patients

Infusion, normal saline solution , 1000 cc J7030

An infusion of normal saline solution, 1000 cc, is a common medical procedure. It involves introducing a saltwater solution into your bloodstream via an intravenous (IV) line. This helps to hydrate your body, correct electrolyte imbalances, and deliver medications if needed.

28 services25 patients

Albuterol, inhalation solution, fda-approved final product, non-compounded, administered through dme, unit dose, 1 mg J7613

Albuterol is a medication used to treat breathing problems. It is administered as an inhalation solution through a device called DME (Durable Medical Equipment). The solution is FDA-approved and non-compounded. Each unit dose contains 1 mg of the medicine.

20 services12 patients

Albumin (protein) level 82040

The Albumin Level test measures the amount of albumin, a vital protein made by the liver, in your blood. This protein helps keep fluid in your bloodstream so it doesn't leak into other tissues. It's also vital for tissue growth and healing. Low or high levels can indicate certain health issues.

15 services15 patients

Amylase (enzyme) level 82150

Amylase is an enzyme that helps break down starches into sugars during digestion. An amylase level test measures the amount of this enzyme in your blood or urine. This test helps identify conditions like pancreatitis or other digestive issues.

15 services15 patients

Bilirubin level, total 82247

A total bilirubin level test is a blood test that helps check how well your liver is functioning. It measures bilirubin, a yellow substance your body creates when it breaks down red blood cells. High levels may indicate a problem with your liver or bile duct.

15 services15 patients

Phosphatase (enzyme) level, alkaline 84075

The Alkaline Phosphatase Level test measures the amount of alkaline phosphatase, an enzyme, in your blood. High or low levels can indicate a variety of health conditions, such as liver disease or bone disorders. It's a common test done to help diagnose and monitor these conditions.

15 services15 patients

Total protein level, blood 84155

A total protein level blood test measures the amount of proteins in your blood. Proteins are essential for body functions, including immune response, tissue repair, and nutrient transportation. Abnormal levels may indicate certain diseases or conditions. It's a simple test involving a blood draw.

15 services15 patients

Liver enzyme (sgot), level 84450

A Liver Enzyme (SGOT) Level test is a simple blood test used to measure the amount of certain enzymes in your blood. These enzymes are normally found in liver cells. If the liver is damaged or diseased, these enzymes can leak into your bloodstream, indicating potential liver issues.

15 services15 patients

Liver enzyme (sgpt), level 84460

A liver enzyme (SGPT) level test is a blood test that checks the health of your liver. SGPT is an enzyme found in your liver cells. If your liver is damaged or inflamed, SGPT can leak into your bloodstream, raising the enzyme level. This test helps identify liver diseases early.

15 services15 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

13 services13 patients

Inhalation treatment for airway obstruction or sputum production 94640

Inhalation treatment, also known as nebulizer therapy, helps clear airway obstructions and reduce sputum production. It involves breathing in medication through a device, turning it into a mist. This can open up the airways, making breathing easier and helping to cough out mucus.

12 services12 patients

Ipratropium bromide, inhalation solution, fda-approved final product, non-compounded, administered through dme, unit dose form, per milligram J7644

Ipratropium bromide is a medication used to control symptoms of lung diseases like COPD. Administered through a device called DME (Durable Medical Equipment), it's inhaled directly into the lungs. It's FDA-approved and provided in unit-dose form per milligram.

12 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63368 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

$86.32 typical visit price

range $55.65 – $169.38

Typical copayment $21.58 (range $13.91 – $42.34)

Most-billed visit code 99203

Established Patient

$98.37 typical visit price

range $17.76 – $137.92

Typical copayment $24.59 (range $4.44 – $34.48)

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.

54.72/100

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

Scored as part of a group practice

Quality

47.43

Promoting Interoperability

Improvement Activities

Cost

84.97

Other Providers at the Same Location NPPES 7

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

TARA LYNN BARNES-CHERRY APRN, FNP-BC

Nurse Practitioner

2630 STATE HIGHWAY K
OFALLON, MO 63368

St. Charles County (636) 980-5300

JAMES WENDELL DO

Family Medicine

2630 STATE HIGHWAY K, STE 100
OFALLON, MO 63368

St. Charles County (636) 240-5454

RACHEL DORMAN NP

Nurse Practitioner

2630 STATE HIGHWAY K, STE 100
O'FALLON, MO 63368

St. Charles County (636) 240-5454

MRS. BEVERLY DAWN SCHNEIDER FNP-BC

Nurse Practitioner

2630 STATE HIGHWAY K
O'FALLON, MO 63368

St. Charles County (636) 240-5454

ALISSA BALLARD DO

Family Medicine

2630 STATE HIGHWAY K, STE 100
O'FALLON, MO 63368

St. Charles County (636) 240-5454

DR. MATTHEW A BECKERDITE MD

Family Medicine

2630 STATE HIGHWAY K, STE 100
OFALLON, MO 63368

St. Charles County (636) 240-5454

GEORGE P. STACHECKI M.D.

Family Medicine

2630 STATE HIGHWAY K, STE 100
O'FALLON, MO 63368

St. Charles County (636) 240-5454

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mary Withoelter's NPI number?

The NPI number for Mary Withoelter is 1982188389. It was assigned to this individual provider in the NPPES registry on September 20, 2018.

Where is Mary Withoelter located?

Mary Withoelter practices at 2630 State Highway K, Ofallon, MO 63368. The listed phone number is (636) 980-5300.

What is Mary Withoelter's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Is Mary Withoelter enrolled in Medicare?

Yes. Mary Withoelter is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Mary Withoelter's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mary Withoelter reassigns Medicare benefits to 3 organizations: Physician Groups Lc (Saint Louis, MO), Total Access Urgent Care, PC (Saint Louis, MO) and Ut Regional One Physicians Inc (Memphis, TN). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mary Withoelter's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mary Withoelter accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan and Ambetter of Oklahoma and 2 other insurers list Mary Withoelter as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Mary Withoelter was last updated on September 18, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.