Mark Prochaska, M.D.
Mark Prochaska, M.D. is a Forensic Psychiatry Physician in Overland Park, KS, registered under NPI 1417953290. This provider registers 4 separate taxonomy codes, which usually means they practise across more than one recognised specialty. 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 7011 W 121ST ST STE 105, Overland Park, KS 66209. 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 |
|---|---|---|
| 04-21187 | KS | Forensic Psychiatry Physician primary |
| 04-21187 | KS | Psychiatry Physician |
| 04-21187 | KS | Geriatric Psychiatry Physician |
| 04-21187 | KS | Addiction Psychiatry Physician |
This provider holds licence 04-21187 issued in KS. 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 Forensic Psychiatry covers
Forensic Psychiatry is a subspecialty with psychiatric focus on interrelationships with civil, criminal and administrative law, evaluation and specialized treatment of individuals involved with the legal system, incarcerated in jails, prisons, and forensic psychiatry hospitals. NUCC Health Care Provider Taxonomy, code 2084F0202X
All registered taxonomy codes
This provider registers 4 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 2084F0202X | Forensic Psychiatry Physician Forensic Psychiatry | 04-21187 | KS | primary |
| 2084P0800X | Psychiatry Physician Psychiatry | 04-21187 | KS | |
| 2084P0805X | Geriatric Psychiatry Physician Geriatric Psychiatry | 04-21187 | KS | |
| 2084P0802X | Addiction Psychiatry Physician Addiction Psychiatry | 04-21187 | KS |
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 | 1417953290 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 25, 2005 |
| Last updated | Sep 11, 2025 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | M.D. |
| Practice address |
7011 W 121ST ST STE 105 Overland Park, KS 66209 (913) 345-1191 Fax (913) 345-1464 |
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 | 4 | 1 | 7 | 9 | 5 | 3 | 2 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 4 | 2 | 7 | 9 | 5 | 6 | 2 | 9 |
Sum = 70 · next multiple of 10 = 70 · 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.