MERYL RUTKOWSKI LUDWIG MD
NPI 1073812442
Orthopaedic Surgery - Pediatric Orthopaedic Surgery in Fairfax, VA

NPI Status: Active since March 24, 2011

Contact Information

3023 HAMAKER CT STE 500
FAIRFAX, VA
ZIP 22031
Phone: (703) 876-2788

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

Individual
Female
Orthopaedic Surgery
Pediatric Orthopaedic Surgery

About MERYL LUDWIG

This page provides the complete NPI Profile along with additional information for Meryl Ludwig, a provider established in Fairfax, Virginia with a medical specialization in Orthopaedic Surgery, focusing in pediatric orthopaedic surgery . The healthcare provider is registered in the NPI registry with number 1073812442 assigned on March 2011. The practitioner's primary taxonomy code is 207XP3100X with license number 0101262534 (VA). The provider is registered as an individual and her NPI record was last updated 8 years ago.

NPI: 1073812442
Provider Name: MERYL RUTKOWSKI LUDWIG MD
Gender: Female
Entity Type: Individual
Location Address: 3023 HAMAKER CT STE 500 FAIRFAX, VA 22031
Location Phone: (703) 876-2788
Mailing Address: 3023 HAMAKER CT STE 500 FAIRFAX, VA 22031
Mailing Phone: (703) 876-2788
Is Sole Proprietor?: Yes
Enumeration Date: 03-24-2011
Last Update Date: 10-11-2018
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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 Pediatric Orthopaedic Surgery
Taxonomy Code: 207XP3100X
Type: Allopathic & Osteopathic Physicians
License No.: 0101262534
License State: VA
Taxonomy Description: An orthopedic surgeon who has additional training and experience in diagnosing, treating and managing musculoskeletal problems in infants, children and adolescents. These may include limb and spine deformities (such as club foot, scoliosis); gait abnormalities (limping); bone and joint infections; broken bones.

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	207XP3100X	Allopathic & Osteopathic Physicians	Orthopaedic Surgery Pediatric Orthopaedic Surgery	MD045467 (DC)

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 1073812442, we treat the final digit (2) 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 58. The final step is to find the difference between that total and the next multiple of ten (60 - 58 = 2).

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 → 14 → 1 + 4

Pos 4

Unchanged

Pos 5

Doubled → 16 → 1 + 6

Pos 6

Unchanged

Pos 7

Doubled → 4

Pos 8

Unchanged

Pos 9

Doubled → 8

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 7 → 14 → 5 8 → 16 → 7 2 → 4 4 → 8

Step 2: Add all digits plus the NPI constant

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

2 + 0 + 1 + 4 + 3 + 1 + 6 + 1 + 4 + 4 + 8 + 24 = 58

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

The next multiple of ten after 58 is 60. The difference is the calculated check digit.

60 - 58 = 2

This NPI is valid

The calculated check digit is 2, which matches the last digit of 1073812442.