Provider Profile
Maria Kostantacos, APRN, FNP
Unclaimed ProfileAbout Maria Kostantacos
Listed in the NPI registry as a nurse practitioner, Maria Kostantacos, APRN, FNP practices in Janesville, WI. Maria is also listed as specializing in nurse practitioner — family. According to Medicare claims data, Maria cared for 162 Medicare patients across 278 services. The services billed most often include subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes, subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes, and initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes. NPI 1538493614 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
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) 741-3800
- Email not available
Practice Locations
1010 N WASHINGTON ST
Janesville, WI 53548
Procedures Most Often Billed to Medicare
278 services · 162 patients · 6 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
127 | More often than most peers in Nurse Practitioner |
| Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | Office visit | 99231 |
71 | More often than most peers in Nurse Practitioner |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
26 | As often as other peers in Nurse Practitioner |
| Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes | Office visit | 99221 |
22 | As often as other peers in Nurse Practitioner |
| Hospital discharge day management, 30 minutes or less | Office visit | 99238 |
20 | As often as other peers in Nurse Practitioner |
| Hospital discharge day management, more than 30 minutes | Office visit | 99239 |
12 | Less often 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.
Related specialists at this location 7
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other nurse practitioners in Janesville 8
Same specialty, same city.
More connections — 16 related providers in 2 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2013 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What kind of doctor is Maria Kostantacos, APRN?
Maria Kostantacos, APRN is a nurse practitioner in Janesville, WI. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is Maria Kostantacos, APRN's address?
Maria Kostantacos, APRN is listed at 1010 N Washington St, Janesville, WI 53548. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Maria Kostantacos, APRN?
The number on file is (608) 741-3800. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Maria Kostantacos, APRN's NPI number?
Maria Kostantacos, APRN's National Provider Identifier is 1538493614. 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
Where did Maria Kostantacos, APRN train?
Maria Kostantacos, APRN attended Other, graduating in 2013. This comes from the CMS National Downloadable File.
CMS public data
How long has Maria Kostantacos, APRN been practicing?
Maria Kostantacos, APRN has 13 years experience. Calculated from a graduation year of 2013, reported in the CMS National Downloadable File.
CMS public data
What procedures does Maria Kostantacos, APRN perform?
According to Medicare billing data, Maria Kostantacos, APRN the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Maria Kostantacos, APRN confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Maria Kostantacos, APRN. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.