MARILYN A. MAXWELL M.D.
NPI 1144233164
Internal Medicine in Saint Louis, MO

Active since August 14, 2006PECOS EnrolledAccepts Medicare Assignment
81.57/100
CMS Quality Rating
3660 VISTA AVE, SAINT LOUIS, MO 63110(314) 977-6100(314) 977-6137 Get Directions Write a Review

NPPES record last updated: March 30, 2009. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Marilyn A. Maxwell M.d. NPPES

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

MARILYN A. MAXWELL M.D. (NPI 1144233164) is an individual internal medicine provider in Saint Louis, Missouri, licensed in Missouri (R1D74) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS, is affiliated with Ssm Health Saint Louis University Hospital, and is a graduate of Saint Louis University School Of Medicine (1981).

NPPES Registry Identity

NPI1144233164
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameMARILYN A. MAXWELLCredential: M.D.
Location Address3660 VISTA AVESaint Louis, MO 63110-2540
Mailing Address3691 Rutger St, Provider EnrollmentSaint Louis, MO 63110-2515 · (314) 977-6828 · Fax (314) 977-6777
Fax(314) 977-6137
Sole ProprietorNo
Medical School CMSSaint Louis University School Of MedicineGraduated 1981
Enumeration DateAugust 14, 2006
Last NPPES UpdateMarch 30, 2009
NPI 1144233164 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License Licensed in MO · R1D74
Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

3660 VISTA AVE, Saint Louis, MO 63110

Other Identifiers 3

Medicaid202218012MO
Medicare ID-Type Unspecified050010247MO
Medicare UPINB18534

Accepted 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

Marilyn A. Maxwell M.d. 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 ID1951353051
PECOS Enrollment IDI20050217000131
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 3

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.

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.
58 services51 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.
22 services22 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
20 services20 patients

Hospital Affiliations CMS Care Compare

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

Ssm Health Saint Louis University Hospital

Acute Care Hospitals · Saint Louis, MO
1/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number260105
Location3635 Vista AveSaint Louis, MO 63110 · St. Louis City County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63110 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
$128.28 typical visit price
range $55.65 – $169.38
Typical copayment $32.07 (range $13.91 – $42.34)
Most-billed visit code 99204
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.

81.57/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality76.09
Promoting Interoperability100
Improvement Activities40
Cost54.28

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
6 suppliers13 claims61 services$5.96 avg. paid by Medicare
Albuterol, inhalation solution, fda-approved final product, non-compounded, administered through dme, unit dose, 1 mg J7613
DME-Drugs Administered Through DME · category DG006N
1 supplier11 claims1,650 services$0.03 avg. paid by Medicare
Pharmacy dispensing fee for inhalation drug(s); per 30 days Q0513
DME-Other DME · category DE000N
2 suppliers13 claims13 services$22.01 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

Internal Medicine
3660 VISTA AVE
SAINT LOUIS, MO 63110
Internal Medicine (Nephrology)
3660 VISTA AVE
SAINT LOUIS, MO 63110
Internal Medicine (Geriatric Medicine)
3660 VISTA AVE
SAINT LOUIS, MO 63110
Internal Medicine
3660 VISTA AVE
SAINT LOUIS, MO 63110
Internal Medicine (Nephrology)
3660 VISTA AVE
SAINT LOUIS, MO 63110
Internal Medicine
3660 VISTA AVE
SAINT LOUIS, MO 63110
Pharmacy (Community/Retail Pharmacy)
3660 VISTA AVE
SAINT LOUIS, MO 63110
Hospitalist
3660 VISTA AVE
SAINT LOUIS, MO 63110

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 Marilyn Maxwell's NPI number?

The NPI number for Marilyn Maxwell is 1144233164. It was assigned to this individual provider in the NPPES registry on August 14, 2006.

Where is Marilyn Maxwell located?

Marilyn Maxwell practices at 3660 Vista Ave, Saint Louis, MO 63110. The listed phone number is (314) 977-6100.

What is Marilyn Maxwell's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Marilyn Maxwell enrolled in Medicare?

Yes. Marilyn Maxwell 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.

What insurance does Marilyn Maxwell accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Home State Health and Ambetter from Sunflower Health Plan and 4 other insurers list Marilyn Maxwell 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.

Is Marilyn Maxwell affiliated with any hospitals?

According to CMS data, Marilyn Maxwell is affiliated with Ssm Health Saint Louis University Hospital.

When was this NPI record last updated?

The NPPES record for Marilyn Maxwell was last updated on March 30, 2009. NPI Profile syncs with the weekly NPPES data releases published by CMS.