STEVEN GIRDLER INC.
NPI 1891647483
Orthopaedic Surgery - Orthopaedic Surgery of the Spine in Marina Del Rey, CA

NPI Status: Active since February 13, 2026

Contact Information

4551 GLENCOE AVE STE 145
MARINA DEL REY, CA
ZIP 90292
Phone: (502) 488-0050

NPI Profile Information
Primary Taxonomy
Group Taxonomy
Authorized Official
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Organization
Orthopaedic Surgery
Orthopaedic Surgery of the Spine

About STEVEN GIRDLER INC.

This page provides the complete NPI Profile along with additional information for Steven Girdler Inc., a provider established in Marina Del Rey, California operating as a Orthopaedic Surgery, focusing in orthopaedic surgery of the spine . The healthcare provider is registered in the NPI registry with number 1891647483 assigned on February 2026. The practitioner's primary taxonomy code is 207XS0117X. The provider is registered as an organization and their NPI record was last updated February 2026. The organization operates as a Single Specialty Group with one or more individual practitioners, all of who practice with the same area of specialization. The authorized official of this NPI record is Dr. Steven Girdler (Physician)

NPI: 1891647483
Provider Name: STEVEN GIRDLER INC.
Entity Type: Organization
Location Address: 4551 GLENCOE AVE STE 145 MARINA DEL REY, CA 90292
Location Phone: (502) 488-0050
Mailing Address: 4551 GLENCOE AVE STE 145 MARINA DEL REY, CA 90292
Is Sole Proprietor?: No
Is Organization Subpart?: No
Enumeration Date: 02-13-2026
Last Update Date: 02-13-2026
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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: Orthopaedic Surgery Orthopaedic Surgery of the Spine
Taxonomy Code: 207XS0117X
Type: Allopathic & Osteopathic Physicians
Taxonomy Description: Recognized by several state medical boards as a fellowship subspecialty program of orthopaedic surgery, orthopaedic surgeons of the spine deal with the evaluation and nonoperative and operative treatment of the full spectrum of primary spinal disorders including trauma, degenerative, deformity, tumor, and reconstructive.

Group Taxonomy 193400000X SINGLE SPECIALTY GROUP

This provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.

Authorized Official

The authorized official is the designated individual with the legal authority to make changes to the provider’s official NPI record. For organizations, the authorized official must be a general partner, chairman of the board, CEO, CFO or a direct owner holding at least a 5 percent stake in the medical organization.

Authorized Official Name: DR. STEVEN GIRDLER
Authorized Official Title: PHYSICIAN
Authorized Official Phone: (502) 488-0050

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 1891647483, we treat the final digit (3) 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 67. The final step is to find the difference between that total and the next multiple of ten (70 - 67 = 3).

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 → 18 → 1 + 8

Pos 4

Unchanged

Pos 5

Doubled → 12 → 1 + 2

Pos 6

Unchanged

Pos 7

Doubled → 14 → 1 + 4

Pos 8

Unchanged

Pos 9

Doubled → 16 → 1 + 6

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 9 → 18 → 9 6 → 12 → 3 7 → 14 → 5 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

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

2 + 8 + 1 + 8 + 1 + 1 + 2 + 4 + 1 + 4 + 4 + 1 + 6 + 24 = 67

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

The next multiple of ten after 67 is 70. The difference is the calculated check digit.

70 - 67 = 3

This NPI is valid

The calculated check digit is 3, which matches the last digit of 1891647483.