JOHN WILLIAM ALLEN, PSY.D. P.C.
JOHN WILLIAM ALLEN, PSY.D. P.C. is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1336379304, based in Chicago, IL. The organization lists 2 taxonomy classifications, with Preferred Provider Organization recorded as primary.
Getting there
The practice address on file is 4055 W PETERSON AVE STE. 201, Chicago, IL 60646. 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 |
|---|---|---|
| 071-007404 | IL | Preferred Provider Organization primary |
| 071-007404 | IL | Health Maintenance Organization |
This provider holds licence 071-007404 issued in IL. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
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 Preferred Provider Organization covers
A group of physicians and/or hospitals who contract with an employer to provide services to their employees. In a PPO, the patient may got to the physician of his/her choice, even if that physician does not participate in the PPO, but the patient receives care at a lower benefit level. NUCC Health Care Provider Taxonomy, code 305R00000X
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 | |
|---|---|---|---|---|
| 305R00000X | Preferred Provider Organization | 071-007404 | IL | primary |
| 302R00000X | Health Maintenance Organization | 071-007404 | IL |
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 | 1336379304 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Jul 23, 2009 |
| Last updated | Jul 23, 2009 |
| Status | Active |
| Practice address |
4055 W PETERSON AVE STE. 201 Chicago, IL 60646 (773) 478-2982 Fax (773) 478-8105 |
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 | 3 | 3 | 6 | 3 | 7 | 9 | 3 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 3 | 6 | 6 | 6 | 7 | 9 | 3 | 0 |
Sum = 66 · next multiple of 10 = 70 · 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.