Chelsea Hartzell
Chelsea Hartzell is a Gastroenterology Physician in Lena, IL, registered under NPI 1003450354. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
Here is what surrounds this office in Lena, based on OpenStreetMap data collected Sep 27, 2026. Parking is available about 0.45 mi away.
Getting here and what is nearby
Restaurant Lena Drive-Inn 458 ft ~2 min
Gas station Spirit - Gas Station 546 ft ~3 min
435 West Lena Street, Lena 61048
Restaurant Coach's Golf & Grill 0.24 mi ~5 min
Restaurant Beach's Supper Club 0.29 mi ~6 min
Parking 0.40 mi ~8 min
Parking 0.43 mi ~9 min
Parking 0.45 mi ~10 min
Gas station Casey's General Store 0.49 mi ~10 min
301 North Schuyler Street, Lena 61048
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 |
|---|---|---|
| 209023887 | IL | Gastroenterology Physician primary |
This provider holds licence 209023887 issued in IL. 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
- 3678962578
- Enrollment ID
- I20211115002847
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 Gastroenterology covers
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs. NUCC Health Care Provider Taxonomy, code 207RG0100X
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 | |
|---|---|---|---|---|
| 207RG0100X | Gastroenterology Physician Gastroenterology | 209023887 | IL | primary |
| 390200000X | Student in an Organized Health Care Education/Training Program | — | — |
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 | 1003450354 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Oct 30, 2019 |
| Last updated | Nov 2, 2021 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Practice address |
202 SHERWOOD LN Lena, IL 61048 (815) 541-4654 |
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 | 4 | 5 | 0 | 3 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 8 | 5 | 0 | 3 | 1 |
Sum = 46 · next multiple of 10 = 50 · check digit = 4 · actual last digit = 4
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.