DR. WILLIAM LAO M.D.
NPI 1083874259
Plastic Surgery in New York, NY

NPI Status: Active since June 11, 2008

Contact Information

535 5TH AVE FL 32
NEW YORK, NY
ZIP 10017
Phone: (929) 505-2060

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

Individual
Male
Plastic Surgery

About WILLIAM LAO

This page provides the complete NPI Profile along with additional information for William Lao, a provider established in New York, New York with a medical specialization in Plastic Surgery. The healthcare provider is registered in the NPI registry with number 1083874259 assigned on June 2008. The practitioner's primary taxonomy code is 208200000X with license number 271749 (NY). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI: 1083874259
Provider Name: DR. WILLIAM LAO M.D.
Gender: Male
Entity Type: Individual
Location Address: 535 5TH AVE FL 32 NEW YORK, NY 10017
Location Phone: (929) 505-2060
Mailing Address: 301 E 80TH ST APT 15C NEW YORK, NY 10075
Mailing Phone: (646) 300-5979
Is Sole Proprietor?: Yes
Enumeration Date: 06-11-2008
Last Update Date: 04-21-2025
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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: Plastic Surgery
Taxonomy Code: 208200000X
Type: Allopathic & Osteopathic Physicians
License No.: 271749
License State: NY
Taxonomy Description: A plastic surgeon deals with the repair, reconstruction or replacement of physical defects of form or function involving the skin, musculoskeletal system, craniomaxillofacial structures, hand, extremities, breast and trunk and external genitalia or cosmetic enhancement of these areas of the body. Cosmetic surgery is an essential component of plastic surgery. The plastic surgeon uses cosmetic surgical principles to both improve overall appearance and to optimize the outcome of reconstructive procedures. The surgeon uses aesthetic surgical principles not only to improve undesirable qualities of normal structures but in all reconstructive procedures as well.

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 1083874259, we treat the final digit (9) 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 61. The final step is to find the difference between that total and the next multiple of ten (70 - 61 = 9).

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 → 16 → 1 + 6

Pos 4

Unchanged

Pos 5

Doubled → 16 → 1 + 6

Pos 6

Unchanged

Pos 7

Doubled → 8

Pos 8

Unchanged

Pos 9

Doubled → 10 → 1 + 0

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 8 → 16 → 7 8 → 16 → 7 4 → 8 5 → 10 → 1

Step 2: Add all digits plus the NPI constant

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

2 + 0 + 1 + 6 + 3 + 1 + 6 + 7 + 8 + 2 + 1 + 0 + 24 = 61

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

The next multiple of ten after 61 is 70. The difference is the calculated check digit.

70 - 61 = 9

This NPI is valid

The calculated check digit is 9, which matches the last digit of 1083874259.