John Erdmann, D.C.
John Erdmann, D.C. is a provider specialising in Neurology Chiropractor in Pleasant Hill, CA, registered under NPI 1346410982. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
The practice address on file is 1924 OAK PARK BLVD STE B, Pleasant Hill, CA 94523. 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 |
|---|---|---|
| DCO258600 | CA | Neurology Chiropractor primary |
This provider holds licence DCO258600 issued in CA. 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 Neurology covers
Chiropractic Neurology is defined as the field of functional neurology that engages the internal - and external environment of the individual in a structured and targeted approach to affect positive changes in the nervous system and consequently the physiology and behavior of an individual. Chiropractic Neurologists are board-certified specialists in non-drug, non-surgical care for those with neurologically based health problems. There are many conditions people suffer from that are in this broad category: learning and attention disorders, headaches, vertigo, pain syndromes, developmental disorders, nerve injury, spinal cord injury, head injury or stroke, movement disorders, and many other conditions. NUCC Health Care Provider Taxonomy, code 111NN0400X
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 | 1346410982 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 11, 2008 |
| Last updated | Oct 7, 2010 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | D.C. |
| Practice address |
1924 OAK PARK BLVD STE B Pleasant Hill, CA 94523 (925) 794-3621 |
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 | 4 | 6 | 4 | 1 | 0 | 9 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 3 | 8 | 6 | 8 | 1 | 0 | 9 | 7 |
Sum = 68 · next multiple of 10 = 70 · check digit = 2 · actual last digit = 2
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.