Diane Mcgowan, M.D.
Diane Mcgowan, M.D. is a Plastic Surgery within the Head & Neck (Otolaryngology) Physician in Lagrange, GA, registered under NPI 1801822978. This provider registers 3 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is CLARK-HOLDER CLINIC, P.A. 303 SMITH STREET, Lagrange, GA 30240. 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 |
|---|---|---|
| 29040 | GA | Plastic Surgery within the Head & Neck… primary |
| 29049 | GA | Otolaryngology Physician |
| 29049 | GA | Otolaryngology/Facial Plastic Surgery… |
This provider holds licence 29040 issued in GA. 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 Plastic Surgery within the Head & Neck covers
An otolaryngologist with additional training in plastic and reconstructive procedures within the head, face, neck and associated structures, including cutaneous head and neck oncology and reconstruction, management of maxillofacial trauma, soft tissue repair and neural surgery. The field is diverse and involves a wide age range of patients, from the newborn to the aged. While both cosmetic and reconstructive surgeries are practiced, there are many additional procedures which interface with them. NUCC Health Care Provider Taxonomy, code 207YX0007X
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 | |
|---|---|---|---|---|
| 207YX0007X | Plastic Surgery within the Head & Neck (Otolaryngology) Physician Plastic Surgery within the Head & Neck | 29040 | GA | primary |
| 207Y00000X | Otolaryngology Physician | 29049 | GA | |
| 207YX0905X | Otolaryngology/Facial Plastic Surgery Physician Otolaryngology/Facial Plastic Surgery | 29049 | GA |
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 | 1801822978 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 23, 2006 |
| Last updated | Sep 11, 2025 |
| Status | Active |
| Sole proprietor | No |
| Credential | M.D. |
| Practice address |
CLARK-HOLDER CLINIC, P.A. 303 SMITH STREET Lagrange, GA 30240 (706) 882-8831 Fax (706) 812-4091 |
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 | 8 | 0 | 1 | 8 | 2 | 2 | 9 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 8 | 0 | 1 | 7 | 2 | 4 | 9 | 5 |
Sum = 62 · next multiple of 10 = 70 · check digit = 8 · actual last digit = 8
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.