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CASSANDRA HARTWIG NP
NPI 1215476163
Nurse Practitioner in Waterloo, WI

Active since February 13, 2017PECOS EnrolledAccepts Medicare Assignment
84.56/100
CMS Quality Rating
537 MCKAY WAY, WATERLOO, WI 53594(608) 206-4364 Get Directions Write a Review

NPPES record last updated: June 23, 2023. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Jun 23, 2023, Jan 13, 2021, Dec 8, 2017 and 1 more (4 updates tracked since 2017).

About Cassandra Hartwig Np NPPES

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

CASSANDRA HARTWIG NP (NPI 1215476163) is an individual nurse practitioner in Waterloo, Wisconsin, licensed in Wisconsin (7517) and active in the NPI registry since February 2017. She is enrolled in Medicare PECOS, is affiliated with Aspirus Rhinelander Hospital, and is a graduate of Other (2016).

NPPES Registry Identity

NPI1215476163
Entity TypeIndividualFemale
Primary Taxonomy363L00000X
Provider Legal NameCASSANDRA HARTWIGCredential: NP
Location Address537 MCKAY WAYWaterloo, WI 53594-1530
Mailing Address537 Mckay WayWaterloo, WI 53594-1530
Phone(608) 206-4364
Sole ProprietorNo
Medical School CMSOtherGraduated 2016
Enumeration DateFebruary 13, 2017
Last NPPES UpdateJune 23, 20234 updates tracked since enumeration
NPPES CertifiedJune 23, 2023
✔ NPI 1215476163 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363L00000X
License✔ Licensed in WI · 7517
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.
537 MCKAY WAY, Waterloo, WI 53594
Open in Google Maps ↗

Other Names 1

Former Name (1)Cassandra Recob Np

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Aspirus Health Plan, HealthPartners.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

Cassandra Hartwig Np 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 ID3870877970
PECOS Enrollment IDI20170309002447
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 Cassandra Hartwig reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Aspirus Rhinelander & Tomahawk Hospitals & Clinics, Inc.
89 mi
Clinic/Center
272 CHRISTY ST
Amherst, WI 54406
  • Reassigned Medicare billing, Wisconsin enrollment
  • 935 clinicians in this Medicare group
NPI 1316616428 (715) 824-5151
The Howard Young Medical Center, Inc.
191 mi
General Acute Care Hospital
240 MAPLE ST
Woodruff, WI 54568
  • Reassigned Medicare billing, Wisconsin enrollment
  • Medicare enrollment name: Howard Young Medical Center Inc Of Woodruff Wisconsin
  • 358 clinicians in this Medicare group
NPI 1134183171 (715) 356-8000

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 6

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 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.
201 services80 patients
Removal of skin and tissue, 20.0 sq cm or less 11042
This procedure involves the surgical removal of skin and tissue, up to 20.0 square cm in size. It's often performed to treat conditions like skin cancer or to remove moles, warts, and other skin lesions. The area is numbed and the unwanted tissue is carefully cut out.
187 services82 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.
87 services87 patients
Removal of tissue from wound, 20.0 sq cm or less 97597
This procedure involves the careful removal of damaged or infected tissue from a wound that's 20.0 square cm or less. It's done to promote healing and prevent further infection. The process is carried out under local anesthesia, ensuring minimal discomfort.
62 services41 patients
Removal of skin and tissue, each additional 20.0 sq cm or less 11045
This procedure involves the removal of skin and tissue, typically due to disease, injury, or abnormal growth. Each session removes an area of 20.0 square cm or less. It's performed by a trained professional and may require multiple sessions for larger areas.
51 services18 patients
Removal of muscle and/or tissue, 20.0 sq cm or less 11043
This procedure involves the surgical removal of a specified area (20.0 sq cm or less) of muscle and/or tissue. It's typically done to treat conditions like tumors, infections, or injuries. Local or general anesthesia ensures comfort. Recovery time varies.
27 services14 patients

Hospital Affiliations CMS Care Compare 5

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

Aspirus Rhinelander Hospital

Acute Care Hospitals · Rhinelander, WI
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520019
Location2251 North Shore DrRhinelander, WI 54501 · Oneida County
Emergency services Birthing friendly

Howard Young Medical Center

Acute Care Hospitals · Woodruff, WI
5/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number520091
Location240 Maple StWoodruff, WI 54568 · Vilas County
Emergency services

Marshfield Medical Center - Minocqua

Acute Care Hospitals · Minocqua, WI
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520212
Location9576 Highway 70Minocqua, WI 54548 · Oneida County
Emergency services Birthing friendly

Aspirus Eagle River Hospital

Critical Access Hospitals · Eagle River, WI
OwnershipVoluntary non-profit - Private
CMS Certification Number521300
Location201 Hospital RoadEagle River, WI 54521 · Vilas County
Emergency services

Aspirus Tomahawk Hospital

Critical Access Hospitals · Tomahawk, WI
OwnershipVoluntary non-profit - Private
CMS Certification Number521313
Location401 W Mohawk Dr Suite 100Tomahawk, WI 54487 · Lincoln County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 53594 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
$82.92 typical visit price
range $53.90 – $163.24
Typical copayment $20.73 (range $13.47 – $40.81)
Most-billed visit code 99203
Established Patient
$95.41 typical visit price
range $17.40 – $133.76
Typical copayment $23.85 (range $4.35 – $33.44)
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.

84.56/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality89.8
Promoting Interoperability100
Improvement Activities40
Cost58.73

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 Cassandra Hartwig's NPI number?

The NPI number for Cassandra Hartwig is 1215476163. It was assigned to this individual provider in the NPPES registry on February 13, 2017. The provider is also known as Cassandra Recob Np.

Where is Cassandra Hartwig located?

Cassandra Hartwig practices at 537 Mckay Way, Waterloo, WI 53594. The listed phone number is (608) 206-4364.

What is Cassandra Hartwig's specialty?

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

Is Cassandra Hartwig enrolled in Medicare?

Yes. Cassandra Hartwig 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 Cassandra Hartwig's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Cassandra Hartwig reassigns Medicare benefits to 2 organizations: Aspirus Rhinelander & Tomahawk Hospitals & Clinics, Inc. (Amherst, WI) and The Howard Young Medical Center, Inc. (Woodruff, WI). 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 Cassandra Hartwig's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Cassandra Hartwig accept?

Health plans from Aspirus Health Plan and HealthPartners list Cassandra Hartwig 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 Cassandra Hartwig affiliated with any hospitals?

According to CMS data, Cassandra Hartwig is affiliated with Aspirus Rhinelander Hospital, Howard Young Medical Center, Marshfield Medical Center - Minocqua, Aspirus Eagle River Hospital and Aspirus Tomahawk Hospital.

When was this NPI record last updated?

The NPPES record for Cassandra Hartwig was last updated on June 23, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.