DIANNA L DEAN, LPC, PC
DIANNA L DEAN, LPC, PC is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1699835991, based in Denison, TX. The organization lists 2 taxonomy classifications, with Mental Health Counselor recorded as primary.
Getting there
The practice address on file is 416 E MAIN ST, Denison, TX 75021. 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 |
|---|---|---|
| 16757 | TX | Mental Health Counselor primary |
| 26213 | TX | Social Worker |
| 3066 | OK | Mental Health Counselor |
Licences are recorded in 2 states: TX, OK. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
- Status
- Approved
- Provider type
- Part B Supplier - Clinic/group Practice
- PAC ID
- 1052759859
- Enrollment ID
- O20240328003740
Medicare enrolment is recorded as approved under the provider type Part B Supplier - Clinic/group Practice. 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.
Licensed in 2 states
This provider holds licences in 2 states: Oklahoma and Texas. The practice address on file is in Denison, TX, but a licence in another state usually means they see patients there too — either at a second location or by telehealth. If the address above is far from you, it is worth calling to ask whether they practise closer to where you live.
Licence numbers are self-reported to NPPES at registration. They do not confirm a licence is currently active, in good standing, or valid for the specialty shown — only the state board can tell you that, which is why we link to each one.
What Mental Health covers
Definition to come... NUCC Health Care Provider Taxonomy, code 101YM0800X
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 101YM0800X | Mental Health Counselor Mental Health | 16757 | TX | primary |
| 104100000X | Social Worker | 26213 | TX | |
| 101YM0800X | Mental Health Counselor Mental Health | 3066 | OK |
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 | 1699835991 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Dec 11, 2006 |
| Last updated | Sep 11, 2025 |
| Status | Active |
| Practice address |
416 E MAIN ST Denison, TX 75021 (903) 465-6344 Fax (903) 465-5943 |
| Other identifiers |
2808941-01
· Medicaid (TX) |
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 | 6 | 9 | 9 | 8 | 3 | 5 | 9 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 6 | 9 | 9 | 7 | 3 | 1 | 9 | 9 |
Sum = 79 · next multiple of 10 = 80 · check digit = 1 · actual last digit = 1
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.