Toni Mcmillan, PH.D.
Toni Mcmillan, PH.D. is a School Psychologist in Manassas, VA, registered under NPI 1194856484. This provider registers 10 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 6202 RAMBLEWOOD TRL, Manassas, VA 20112. 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 |
|---|---|---|
| 0910001739 | VA | School Psychologist primary |
| 0810001739 | VA | Addiction (Substance Use Disorder)… |
| 0910001739 | VA | Adult Development & Aging Psychologist |
| 0910001739 | VA | Cognitive & Behavioral Psychologist |
| 0910001739 | VA | Clinical Psychologist |
| 0910001739 | VA | Clinical Child & Adolescent Psychologist |
| 0910001739 | VA | Family Psychologist |
| 0910001739 | VA | Forensic Psychologist |
| 0910001739 | VA | Psychologist |
| 0910001739 | VA | Group Psychotherapy Psychologist |
This provider holds licence 0910001739 issued in VA. 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 School covers
A psychologist whose specialty is concerned with the science and practice of psychology with children, youth, families; learners of all ages; and the schooling process. The basic education and training of school psychologists prepares them to provide a range of psychological diagnosis, assessment, intervention, prevention, health promotion, and program development and evaluation services with a special focus on the developmental processes of children and youth within the context of schools, families and other systems. School psychologists are prepared to intervene at the individual and system level, and develop, implement, and evaluate preventive programs. In these efforts, they conduct ecologically valid assessments and intervene to promote positive learning environments within which children and youth from diverse backgrounds to ensure that all have equal access to effective educational and psychological services that promote healthy development NUCC Health Care Provider Taxonomy, code 103TS0200X
All registered taxonomy codes
This provider registers 10 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 103TS0200X | School Psychologist School | 0910001739 | VA | primary |
| 103TA0400X | Addiction (Substance Use Disorder) Psychologist Addiction (Substance Use Disorder) | 0810001739 | VA | |
| 103TA0700X | Adult Development & Aging Psychologist Adult Development & Aging | 0910001739 | VA | |
| 103TB0200X | Cognitive & Behavioral Psychologist Cognitive & Behavioral | 0910001739 | VA | |
| 103TC0700X | Clinical Psychologist Clinical | 0910001739 | VA | |
| 103TC2200X | Clinical Child & Adolescent Psychologist Clinical Child & Adolescent | 0910001739 | VA | |
| 103TF0000X | Family Psychologist Family | 0910001739 | VA | |
| 103TF0200X | Forensic Psychologist Forensic | 0910001739 | VA | |
| 103T00000X | Psychologist | 0910001739 | VA | |
| 103TP2701X | Group Psychotherapy Psychologist Group Psychotherapy | 0910001739 | VA |
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 | 1194856484 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 8, 2007 |
| Last updated | Sep 11, 2025 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | PH.D. |
| Practice address |
6202 RAMBLEWOOD TRL Manassas, VA 20112 (703) 368-4984 Fax (703) 368-9855 |
| Mailing address |
12872 HARBOR DR Woodbridge, VA 22192 |
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 | 1 | 9 | 4 | 8 | 5 | 6 | 4 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 1 | 9 | 4 | 7 | 5 | 3 | 4 | 7 |
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.