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MS. ALEXANDRA DAWN HEIMANN FNP
NPI 1538969332
Nurse Practitioner - Family in Saint Louis, MO

Active since March 19, 2025PECOS EnrolledAccepts Medicare Assignment
1044 N MASON RD, DIV IM GENERAL MED, STE 330, SAINT LOUIS, MO 63141(314) 996-8103(314) 996-3230 Get Directions Write a Review

NPPES record last updated: May 21, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: May 21, 2025, Mar 19, 2025 (2 updates tracked since 2025).

About Ms. Alexandra Dawn Heimann Fnp NPPES

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

MS. ALEXANDRA DAWN HEIMANN FNP (NPI 1538969332) is an individual family provider in Saint Louis, Missouri, licensed in Missouri (2025008597) and active in the NPI registry since March 2025. She is enrolled in Medicare PECOS and is a graduate of Other (2024).

NPPES Registry Identity

NPI1538969332
Entity TypeIndividualFemale
Primary Taxonomy363LF0000X
Provider Legal NameMS. ALEXANDRA DAWN HEIMANNCredential: FNP
Location Address1044 N MASON RD, DIV IM GENERAL MED, STE 330Saint Louis, MO 63141-6431
Mailing AddressPo Box 7412011Chicago, IL 60674-2011 · (314) 996-8103 · Fax (314) 996-3230
Phone(314) 996-8103
Fax(314) 996-3230
Sole ProprietorNo
Medical School CMSOtherGraduated 2024
Enumeration DateMarch 19, 2025
Last NPPES UpdateMay 21, 20252 updates tracked since enumeration
NPPES CertifiedMarch 18, 2025
✔ NPI 1538969332 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LF0000X
License✔ Licensed in MO · 2025008597
1044 N MASON RD, Saint Louis, MO 63141
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include UnitedHealthcare.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

Ms. Alexandra Dawn Heimann Fnp 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 ID6800314014
PECOS Enrollment IDI20250520004068
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 Reassignment

Medicare enrollment records show Alexandra Heimann reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Washington University
12 mi
Multi-Specialty
660 S EUCLID AVE
Saint Louis, MO 63110
  • Reassigned Medicare billing, Missouri enrollment
  • 1,133 clinicians in this Medicare group
NPI 1992746903 (314) 747-5192

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63141 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.

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.

DR. WILLIAM C CHAPMAN JR. MD
Colon & Rectal Surgery
1044 N MASON RD, DIV SURG COLON/RECTAL, STE 310
SAINT LOUIS, MO 63141
St. Louis County (314) 454-7177
MS. ELIZABETH BURTON WALDEN- PRATER AGNP
Nurse Practitioner
1044 N MASON RD, DIV IM GENERAL MED, STE 330
SAINT LOUIS, MO 63141
St. Louis County (314) 996-8103
MS. ALEXANDRA ELIZABETH GRAHAM PA
Physician Assistant
1044 N MASON RD, DIV IM ENDOCRINOLOGY, STE 330
SAINT LOUIS, MO 63141
St. Louis County (314) 362-3500
MS. ALICIA MARIE STORTS FNP
Nurse Practitioner (Family)
1044 N MASON RD, DEPT ORTHOPAEDIC SURGERY, STE 110/210
SAINT LOUIS, MO 63141
St. Louis County (314) 514-3500
DR. RICHARD IAN STEIN PHD
Psychologist (Clinical)
1044 N MASON RD, DIV IM GERIATRIC MED, STE 330
SAINT LOUIS, MO 63141
St. Louis County (314) 286-2080
DR. HEIDI HOPE TASTET MD
Internal Medicine
1044 N MASON RD, DIV IM GENERAL MED, STE 330
SAINT LOUIS, MO 63141
St. Louis County (314) 996-8103
DR. JOHN SPENCER MAYS MD
General Practice
1044 N MASON RD, DIV IM GENERAL MED, STE 330
SAINT LOUIS, MO 63141
St. Louis County (314) 996-8103
MS. CARLY ROSE NOVELLY SLP
Speech-Language Pathologist
1044 N MASON RD, DEPT OTOLARYNGOLOGY, STE L20
CREVE COEUR, MO 63141
St. Louis County (314) 362-7509

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 Alexandra Heimann's NPI number?

The NPI number for Alexandra Heimann is 1538969332. It was assigned to this individual provider in the NPPES registry on March 19, 2025.

Where is Alexandra Heimann located?

Alexandra Heimann practices at 1044 N Mason Rd Div Im General Med, Ste 330, Saint Louis, MO 63141. The listed phone number is (314) 996-8103.

What is Alexandra Heimann's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Is Alexandra Heimann enrolled in Medicare?

Yes. Alexandra Heimann 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 organization bills Medicare for Alexandra Heimann's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alexandra Heimann reassigns Medicare benefits to Washington University (Saint Louis, MO). The 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 Alexandra Heimann's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Alexandra Heimann accept?

Health plans from UnitedHealthcare list Alexandra Heimann 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 Alexandra Heimann was last updated on May 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.