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MS. NANCY S GIAIMO FNP
NPI 1699719971
Nurse Practitioner - Family in Lake St Louis, MO

Active since June 16, 2006PECOS EnrolledAccepts Medicare Assignment
6261 RONALD REAGAN DR STE B18, LAKE ST LOUIS, MO 63367(636) 561-3021 Get Directions Write a Review

NPPES record last updated: February 11, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Feb 11, 2021, Feb 4, 2016 (2 updates tracked since 2016).

About Ms. Nancy S Giaimo Fnp NPPES

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

MS. NANCY S GIAIMO FNP (NPI 1699719971) is an individual family provider in Lake St Louis, Missouri, licensed in Missouri (124244) and active in the NPI registry since June 2006. She is enrolled in Medicare PECOS, is affiliated with Ssm St Joseph Hospital West, and maintains a secondary practice location in Lake St Louis.

NPPES Registry Identity

NPI1699719971
Entity TypeIndividualFemale
Primary Taxonomy363LF0000X
Provider Legal NameMS. NANCY S GIAIMOCredential: FNP
Location Address6261 RONALD REAGAN DR STE B18Lake St Louis, MO 63367-2665
Mailing Address6261 Ronald Reagan Dr Ste B18Lake St Louis, MO 63367-2665 · (636) 561-3021
Phone(636) 561-3021
Sole ProprietorNo
Medical School CMSOtherGraduated 2003
Enumeration DateJune 16, 2006
Last NPPES UpdateFebruary 11, 20212 updates tracked since enumeration
NPPES CertifiedFebruary 11, 2021
✔ NPI 1699719971 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 · 124244
6261 RONALD REAGAN DR STE B18, Lake St Louis, MO 63367
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Other Names 1

Former Name (1)Ms. Nancy Weintraut Fnp

Secondary Practice Location 1

Location 16261 Ronald Reagan Dr Ste B19Lake St Louis, MO 63367-2665 · Phone (636) 561-3021 · Fax (636) 561-3022

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. Nancy S Giaimo 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 ID4688622137
PECOS Enrollment IDI20050111000639
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

2

Medicare enrollment records show Nancy Giaimo reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Our Urgent Care, LLC
5.5 mi
Urgent Care
1111 W PEARCE BLVD
Wentzville, MO 63385
  • Reassigned Medicare billing, Missouri enrollment
  • 46 clinicians in this Medicare group
NPI 1902815863 (252) 813-9104
Physician Groups Lc
19 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

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 9

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.
238 services137 patients
Insertion of needle into vein for collection of blood sample 36415
This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.
166 services134 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.
112 services112 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.
50 services48 patients
Hemoglobin a1c level 83036
Hemoglobin A1c (HbA1c) is a test that measures your average blood sugar level over the past 2-3 months. It's used to monitor how well diabetes is being controlled. High levels may indicate that your diabetes treatment plan needs adjustment.
49 services25 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
29 services29 patients

Hospital Affiliations CMS Care Compare

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

Ssm St Joseph Hospital West

Acute Care Hospitals · Lake Saint Louis, MO
3/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number260200
Location100 Medical PlazaLake Saint Louis, MO 63367 · St. Charles County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63367 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.

Referred Medical Equipment & Supplies CMS DME claims

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

Continuous positive airway pressure (cpap) device E0601
DME-Other DME · category DE001N
1 supplier12 claims13 services$31.62 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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 Nancy Giaimo's NPI number?

The NPI number for Nancy Giaimo is 1699719971. It was assigned to this individual provider in the NPPES registry on June 16, 2006. The provider is also known as Ms. Nancy Weintraut Fnp.

Where is Nancy Giaimo located?

Nancy Giaimo practices at 6261 Ronald Reagan Dr Ste B18, Lake St Louis, MO 63367. The listed phone number is (636) 561-3021.

What is Nancy Giaimo's specialty?

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

Is Nancy Giaimo enrolled in Medicare?

Yes. Nancy Giaimo 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 Nancy Giaimo's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nancy Giaimo reassigns Medicare benefits to 2 organizations: Our Urgent Care, LLC (Wentzville, MO) and Physician Groups Lc (Saint Louis, MO). 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 Nancy Giaimo's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Nancy Giaimo accept?

Health plans from UnitedHealthcare list Nancy Giaimo 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 Nancy Giaimo affiliated with any hospitals?

According to CMS data, Nancy Giaimo is affiliated with Ssm St Joseph Hospital West.

When was this NPI record last updated?

The NPPES record for Nancy Giaimo was last updated on February 11, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years 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.