Steven Nakajima, M.D.
Steven Nakajima, M.D. is a Reproductive Endocrinology Physician in Louisville, KY, registered under NPI 1518983287.
Getting there
The practice address on file is 401 E CHESTNUT ST SUITE 410, 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 |
|---|---|---|
| 34271 | KY | Reproductive Endocrinology Physician |
| G50959 | CA | Reproductive Endocrinology Physician primary |
Licences are recorded in 2 states: KY, CA. 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: California and Kentucky. 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
- G50959
- Specialty
- Reproductive Endocrinology Physician
- Licence
- 34271
- Specialty
- Reproductive Endocrinology Physician
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 Reproductive Endocrinology covers
An obstetrician/gynecologist who is capable of managing complex problems relating to reproductive endocrinology and infertility. NUCC Health Care Provider Taxonomy, code 207VE0102X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207VE0102X | Reproductive Endocrinology Physician Reproductive Endocrinology | 34271 | KY | |
| 207VE0102X | Reproductive Endocrinology Physician Reproductive Endocrinology | G50959 | CA | primary |
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 | 1518983287 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 14, 2006 |
| Last updated | Jun 23, 2014 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | M.D. |
| Practice address |
401 E CHESTNUT ST SUITE 410 Louisville, KY 40202 (502) 271-5999 Fax (502) 271-5994 |
| Mailing address |
550 S JACKSON ST FL ST2 DEPT OB/GYN ATT VICKI MASTERSON Louisville, KY 40202 |
| Other identifiers |
000000045431
· Other (KY) 000000047618 · Other (KY) 1071901 · Other (KY) 1073353 · Other (KY) 1073354 · Other (KY) 200182690 · Medicaid (IN) 64342710 · Medicaid (KY) |
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 | 5 | 1 | 8 | 9 | 8 | 3 | 2 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 5 | 2 | 8 | 9 | 8 | 6 | 2 | 7 |
Sum = 73 · next multiple of 10 = 80 · check digit = 7 · actual last digit = 7
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.