DR. GRANT CHARLES SCHOONMAKER III MD
NPI 1285259127
Surgery in Orlando, FL

NPI Status: Active since June 16, 2020

Contact Information

77 W UNDERWOOD ST FL 3
ORLANDO, FL
ZIP 32806
Phone: (407) 649-6884
Fax: (407) 245-7059

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  • Individual
  • Male
  • Surgery

About GRANT SCHOONMAKER

This page provides the complete NPI Profile along with additional information for Grant Schoonmaker, a provider established in Orlando, Florida with a medical specialization in Surgery. The healthcare provider is registered in the NPI registry with number 1285259127 assigned on June 2020. The practitioner's primary taxonomy code is 208600000X with license number TRN31352 (FL). The provider is registered as an individual and his NPI record was last updated May 2026.

NPI
1285259127
Provider Name
DR. GRANT CHARLES SCHOONMAKER III MD
Gender
Male
Entity Type
Individual
Location Address
77 W UNDERWOOD ST FL 3 ORLANDO, FL 32806
Location Phone
(407) 649-6884
Location Fax
(407) 245-7059
Mailing Address
169 ASHLEY AVE CHARLESTON, SC 29425
Is Sole Proprietor?
Yes
Enumeration Date
06-16-2020
Last Update Date
05-22-2026
Code Navigator

A surgeon like Grant Schoonmaker treats injuries, diseases, and deformities through surgical operations. A surgeon could correct physical deformities, repair bone and tissue, or perform preventive or elective surgeries. Surgeons also examine patients, perform and interpret diagnostic tests, and provide counsel on preventive healthcare.

Location Map

Secondary Locations

  • 169 Ashley Ave
    Charleston, SC 29425
    (843) 792-2300

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

Surgery

Taxonomy Code
208600000X
Type
Allopathic & Osteopathic Physicians
License No.
TRN31352
License State
FL
Taxonomy Description
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

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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 1285259127, we treat the final digit (7) 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 63. The final step is to find the difference between that total and the next multiple of ten (70 - 63 = 7).

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
1
Doubled → 2
Pos 2
2
Unchanged
Pos 3
8
Doubled → 16 → 1 + 6
Pos 4
5
Unchanged
Pos 5
2
Doubled → 4
Pos 6
5
Unchanged
Pos 7
9
Doubled → 18 → 1 + 8
Pos 8
1
Unchanged
Pos 9
2
Doubled → 4
Check
7
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 8 → 16 → 7 2 → 4 9 → 18 → 9 2 → 4

Step 2: Add all digits plus the NPI constant

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

2 + 2 + 1 + 6 + 5 + 4 + 5 + 1 + 8 + 1 + 4 + 24 = 63

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

The next multiple of ten after 63 is 70. The difference is the calculated check digit.

70 - 63 = 7
This NPI is valid
The calculated check digit is 7, which matches the last digit of 1285259127.

Other Providers at the Same Location


The following 7 providers are registered at the same or a nearby location.

Student in an Organized Health Care Education/Training Program
77 W UNDERWOOD ST FL 3
ORLANDO, FL 32806
Student in an Organized Health Care Education/Training Program
77 W UNDERWOOD ST FL 3
ORLANDO, FL 32806
Student in an Organized Health Care Education/Training Program
77 W UNDERWOOD ST FL 3
ORLANDO, FL 32806
Student in an Organized Health Care Education/Training Program
77 W UNDERWOOD ST FL 3
ORLANDO, FL 32806
Student in an Organized Health Care Education/Training Program
77 W UNDERWOOD ST FL 3
ORLANDO, FL 32806
Internal Medicine
77 W UNDERWOOD ST FL 3
ORLANDO, FL 32806
Student in an Organized Health Care Education/Training Program
77 W UNDERWOOD ST FL 3
ORLANDO, FL 32806

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1285259127, enumerated as an "individual" on June 16, 2020.

The provider is located at 77 W UNDERWOOD ST FL 3 ORLANDO, FL 32806 and the phone number is (407) 649-6884.

Surgery with taxonomy code 208600000X.