CHESTNUT HEALTH SYSTEMS, INC.
CHESTNUT HEALTH SYSTEMS, INC. is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1003194150, based in Pontoon Beach, IL. It is classified under Mental Health Clinic/Center (Including Community Mental Health Center).
Getting there
Here is what surrounds this office in Pontoon Beach, based on OpenStreetMap data collected Sep 10, 2026. Parking is available about 0.51 mi away.
Getting here and what is nearby
Grocery Leroy's Market 0.20 mi ~4 min
Convenience Casey's General Store 0.25 mi ~5 min
Gas station Casey's General Store 0.25 mi ~5 min
Parking 0.32 mi ~7 min
Restaurant Uncle Linny's Restaurant 0.33 mi ~7 min
Parking 0.42 mi ~9 min
Parking 0.51 mi ~11 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
NPPES does not list a state licence number for this record. That is not unusual — organizations and some provider types are not required to file one. Verify current licensure with the relevant state board before care.
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.
What Mental Health (Including Community Mental Health Center) covers
Definition to come... NUCC Health Care Provider Taxonomy, code 261QM0801X
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-2 identifies an organization — a clinic, hospital, group practice, laboratory, or supplier. Individual clinicians working there hold their own NPI-1 numbers separately, so a bill may reference both.
| NPI | 1003194150 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Jul 22, 2011 |
| Last updated | Mar 16, 2023 |
| Status | Active |
| Practice address |
3924 OAKMONT DR Pontoon Beach, IL 62040 (618) 797-2098 |
| Mailing address |
1003 MARTIN LUTHER KING DR Bloomington, IL 61701 |
| Other identifiers |
04023
· Medicaid (IL) |
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 | 1 | 9 | 4 | 1 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 9 | 8 | 1 | 1 |
Sum = 50 · next multiple of 10 = 50 · check digit = 0 · actual last digit = 0
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.