DIANE L MCGOWAN M.D.
NPI 1801822978
Otolaryngology - Plastic Surgery within the Head & Neck in Lagrange, GA

NPI Status: Active since June 23, 2006

Contact Information

CLARK-HOLDER CLINIC, P.A.
303 SMITH STREET
LAGRANGE, GA
ZIP 30240
Phone: (706) 882-8831
Fax: (706) 812-4091

NPI Profile Information
Primary Taxonomy
Secondary Taxonomies
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Female
Otolaryngology
Plastic Surgery within the Head & Neck

About DIANE MCGOWAN

This page provides the complete NPI Profile along with additional information for Diane Mcgowan, a provider established in Lagrange, Georgia with a medical specialization in Otolaryngology, focusing in plastic surgery within the head & neck . The healthcare provider is registered in the NPI registry with number 1801822978 assigned on June 2006. The practitioner's primary taxonomy code is 207YX0007X with license number 29040 (GA). The provider is registered as an individual and her NPI record was last updated one year ago.

NPI: 1801822978
Provider Name: DIANE L MCGOWAN M.D.
Gender: Female
Entity Type: Individual
Location Address: CLARK-HOLDER CLINIC, P.A. 303 SMITH STREET LAGRANGE, GA 30240
Location Phone: (706) 882-8831
Location Fax: (706) 812-4091
Mailing Address: CLARK-HOLDER CLINIC, P.A. 303 SMITH STREET LAGRANGE, GA 30240
Mailing Phone: (706) 882-8831
Mailing Fax: (706) 812-4091
Is Sole Proprietor?: No
Enumeration Date: 06-23-2006
Last Update Date: 09-11-2025
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Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification: Otolaryngology Plastic Surgery within the Head & Neck
Taxonomy Code: 207YX0007X
Type: Allopathic & Osteopathic Physicians
License No.: 29040
License State: GA
Taxonomy Description: 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.

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No.	Taxonomy Code	Type	Classification / Specialization	License No. (State)
1	207Y00000X	Allopathic & Osteopathic Physicians	Otolaryngology	29049 (GA)
2	207YX0905X	Allopathic & Osteopathic Physicians	Otolaryngology Otolaryngology/Facial Plastic Surgery	29049 (GA)

NPI NPI Number Validation

How NPI Validation Works

The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.

To verify the NPI 1801822978, we treat the final digit (8) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 62. The final step is to find the difference between that total and the next multiple of ten (70 - 62 = 8).

Digit-by-digit view

Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.

Pos 1

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 0

Pos 4

Unchanged

Pos 5

Doubled → 16 → 1 + 6

Pos 6

Unchanged

Pos 7

Doubled → 4

Pos 8

Unchanged

Pos 9

Doubled → 14 → 1 + 4

Check

Target digit

Regular digit Doubled digit Check digit

Step 1: Double every other digit from the right

Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.

1 → 2 0 → 0 8 → 16 → 7 2 → 4 7 → 14 → 5

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 8 + 0 + 1 + 1 + 6 + 2 + 4 + 9 + 1 + 4 + 24 = 62

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 62 is 70. The difference is the calculated check digit.

70 - 62 = 8

This NPI is valid

The calculated check digit is 8, which matches the last digit of 1801822978.