Doctor profile · Federal record
Dr. Cassandra Hartwig, NP
Nurse Practitioner · Waterloo, WI
- NPI 1215476163
- Accepts Medicare
- MIPS 84.6 / 100 · 2023
- 10 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
537 McKay Way
Waterloo, WI 535941530
(608) 206-4364
Credentials & registration
- NPI registered
- February 2017 — 9 yrs on file
- Profile last updated
- June 23, 2023
- Year of graduation
- 2016 — 10 yrs since
- Specialty taxonomy
- 363L00000X — NUCC code
- State license (1)
- Wisconsin #7517
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1215476163. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
111
Distinct HCPCS
3
Medicare allowed
$5,949
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
11042 |
Removal of skin and tissue, 20.0 sq cm or less | 49 | 27 | $47 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 35 | 26 | $53 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 27 | 27 | $66 |
In context: peer comparison
Among 1 peers in Waterloo Nurse Practitioner, average services per provider: 37. This provider delivers 3.0× the peer median.Open Payments
Industry payments received
All-time total
$21
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Smith+Nephew, INC. | 1 | $21.40 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
25
Patients
14
Total drug cost
$656
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Omeprazole | Generic | 25 | 14 | $656 |
Frequently asked questions
What is Dr. Cassandra Hartwig's medical specialty?
Dr. Cassandra Hartwig practices Nurse Practitioner in Waterloo, WI.
Where does Dr. Cassandra Hartwig practice?
Dr. Cassandra Hartwig practices at 537 McKay Way, Waterloo, WI 535941530. Office phone: 6082064364.
What is Dr. Cassandra Hartwig's NPI?
Dr. Cassandra Hartwig's National Provider Identifier (NPI) is 1215476163, issued by NPPES.
Does Dr. Cassandra Hartwig accept Medicare assignment?
Yes. Dr. Cassandra Hartwig accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Cassandra Hartwig commonly perform?
Top Medicare-reported procedures in 2023: Removal of skin and tissue, 20.0 sq cm or less (HCPCS 11042); Established patient office or other outpatient visit (HCPCS 99213); New patient office or other outpatient visit (HCPCS 99203). Source: CMS Medicare Physician & Other Practitioners file.