Erin Kosak, NP
Erin Kosak, NP is a Primary Care Nurse Practitioner in Charleston, SC, registered under NPI 1003276676. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in Charleston, based on OpenStreetMap data collected Sep 15, 2026. Parking is available about 0.38 mi away. A pharmacy sits 515 ft from the entrance (CVS Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 579 ft away.
Getting here and what is nearby
Restaurant Charlotte's on Maybank 319 ft ~2 min
1739 Maybank Highway, Charleston 29412
Mo-Su 11:00-00:00
Grocery Harris Teeter 487 ft ~2 min
1739 Maybank Highway, Charleston 29412
Mo-Su 06:00-23:00
Pharmacy CVS Pharmacy 515 ft ~2 min
Restaurant Barberitos 527 ft ~2 min
1739 Maybank Highway, Charleston 29412
Mo-Su 11:00-20:45
Coffee Starbucks 579 ft ~3 min
Restaurant Pho Saigon 594 ft ~3 min
Gas station Refuel Service Station 0.28 mi ~6 min
Parking 0.31 mi ~7 min
Parking 0.35 mi ~7 min
Parking 0.38 mi ~8 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 19923 | SC | Primary Care Nurse Practitioner primary |
This provider holds licence 19923 issued in SC. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Nurse Practitioner
- PAC ID
- 4789978453
- Enrollment ID
- I20160803003073
Medicare enrolment is recorded as approved under the provider type Practitioner - Nurse Practitioner. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Primary Care covers
Definition to come... NUCC Health Care Provider Taxonomy, code 363LP2300X
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 | 1003276676 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Feb 25, 2016 |
| Last updated | Feb 25, 2016 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | NP |
| Practice address |
109 WAPPOO CREEK DR Charleston, SC 29412 (843) 796-7171 Fax (843) 795-7171 |
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 | 0 | 0 | 3 | 2 | 7 | 6 | 6 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 4 | 7 | 3 | 6 | 5 |
Sum = 54 · next multiple of 10 = 60 · check digit = 6 · actual last digit = 6
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.