Provider Profile
Cassandra Hartwig, NP
Unclaimed ProfileAbout Cassandra Hartwig
Cassandra Hartwig, NP is a nurse practitioner based in Waterloo, WI. Medicare claims data shows Cassandra provided 615 services to 322 patients. The services billed most often include established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, removal of skin and tissue, 20.0 sq cm or less, and new patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (608) 206-4364
- Email not available
Practice Locations
537 MCKAY WAY
Waterloo, WI 53594
Procedures Most Often Billed to Medicare
615 services · 322 patients · 6 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Removal of skin and tissue, 20.0 sq cm or less | Procedure | 11042 |
187 | More often than most peers in Nurse Practitioner |
| Removal of skin and tissue, each additional 20.0 sq cm or less | Procedure | 11045 |
51 | Less often than most peers in Nurse Practitioner |
| Removal of muscle and/or tissue, 20.0 sq cm or less | Procedure | 11043 |
27 | Less often than most peers in Nurse Practitioner |
| Removal of tissue from wound, 20.0 sq cm or less | Treatment | 97597 |
62 | As often as other peers in Nurse Practitioner |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
201 | More often than most peers in Nurse Practitioner |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
87 | More than most peers in Nurse Practitioner |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2016 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Removal of skin and tissue, 20.0 sq cm or less 7
Providers in WI who bill this service to Medicare most often.
Common questions
What is Cassandra Hartwig's specialty?
Cassandra Hartwig is a nurse practitioner in Waterloo, WI. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where can I find Cassandra Hartwig?
Cassandra Hartwig is listed at 537 Mckay Way, Waterloo, WI 53594. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Cassandra Hartwig?
The number on file is (608) 206-4364. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Cassandra Hartwig?
Cassandra Hartwig's National Provider Identifier is 1215476163. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Cassandra Hartwig's education?
Cassandra Hartwig attended Other, graduating in 2016. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Cassandra Hartwig have?
Cassandra Hartwig has 10 years experience. Calculated from a graduation year of 2016, reported in the CMS National Downloadable File.
CMS public data
What is Cassandra Hartwig known for?
According to Medicare billing data, Cassandra Hartwig performs procedures including removal of skin and tissue, 20.0 sq cm or less, removal of skin and tissue, each additional 20.0 sq cm or less and removal of muscle and/or tissue, 20.0 sq cm or less; provides treatments such as removal of tissue from wound, 20.0 sq cm or less, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Cassandra Hartwig's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Cassandra Hartwig. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.