Alexzander Estep-kolander, REGISTERED NURSE
Alexzander Estep-kolander, REGISTERED NURSE is a Maternal & Fetal Medicine Physician in Louisville, KY, registered under NPI 1184587958. This provider registers 3 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 530 SOUTH JACKSON ST CENTER FOR WOMEN AND INFANTS, Louisville, KY 40202. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 14091279-1723 | UT | Critical Care Medicine Clinical Nurse… |
| PL018725 | KY | Maternal & Fetal Medicine Physician primary |
| 72490 | Pharmacy Technician |
Licences are recorded in 2 states: UT, KY. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
Licensed in 2 states
This provider holds licences in 2 states: Kentucky and Utah. The practice address on file is in Louisville, KY, but a licence in another state usually means they see patients there too — either at a second location or by telehealth. If the address above is far from you, it is worth calling to ask whether they practise closer to where you live.
- Licence
- PL018725
- Specialty
- Maternal & Fetal Medicine Physician
- Licence
- 14091279-1723
- Specialty
- Critical Care Medicine Clinical Nurse…
Licence numbers are self-reported to NPPES at registration. They do not confirm a licence is currently active, in good standing, or valid for the specialty shown — only the state board can tell you that, which is why we link to each one.
What Maternal & Fetal Medicine covers
An obstetrician/gynecologist who cares for, or provides consultation on, patients with complications of pregnancy. This specialist has advanced knowledge of the obstetrical, medical and surgical complications of pregnancy and their effect on both the mother and the fetus. The specialist also possesses expertise in the most current diagnostic and treatment modalities used in the care of patients with complicated pregnancies. NUCC Health Care Provider Taxonomy, code 207VM0101X
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 364SC0200X | Critical Care Medicine Clinical Nurse Specialist Critical Care Medicine | 14091279-1723 | UT | |
| 207VM0101X | Maternal & Fetal Medicine Physician Maternal & Fetal Medicine | PL018725 | KY | primary |
| 183700000X | Pharmacy Technician | 72490 | — |
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1184587958 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Dec 8, 2025 |
| Last updated | Aug 25, 2026 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | REGISTERED NURSE |
| Practice address |
530 SOUTH JACKSON ST CENTER FOR WOMEN AND INFANTS Louisville, KY 40202 (502) 588-4400 |
| Other names |
Alexzander Estep Former Legal Business Name |
| Other identifiers |
34914159
· Other (PA) |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 1 | 8 | 4 | 5 | 8 | 7 | 9 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 1 | 7 | 4 | 1 | 8 | 5 | 9 | 1 |
Sum = 62 · next multiple of 10 = 70 · check digit = 8 · actual last digit = 8
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.