PROF. DAN REINSTEIN MD
NPI 1770900995
Optometrist - Corneal and Contact Management in London, LONDON

NPI Status: Active since March 26, 2014

Contact Information

138 HARLEY STREET
LONDON, LONDON
ZIP W1G 7
Phone:

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  • Individual
  • Male
  • Optometrist
  • Corneal and Contact Management

About DAN REINSTEIN

This page provides the complete NPI Profile along with additional information for Dan Reinstein, a provider established in London, with a medical specialization in Optometrist, focusing in corneal and contact management . The healthcare provider is registered in the NPI registry with number 1770900995 assigned on March 2014. The practitioner's primary taxonomy code is 152WC0802X with license number 525822 (ZZ). The provider is registered as an individual and his NPI record was last updated 11 years ago.

NPI
1770900995
Provider Name
PROF. DAN REINSTEIN MD
Gender
Male
Entity Type
Individual
Location Address
138 HARLEY STREET LONDON, LONDON W1G 7
Location Phone
Mailing Address
138 HARLEY STREET LONDON, LONDON W1G 7
Is Sole Proprietor?
Yes
Enumeration Date
03-26-2014
Last Update Date
03-25-2015
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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

Optometrist Corneal and Contact Management

Taxonomy Code
152WC0802X
Type
Eye and Vision Services Providers
License No.
525822
License State
ZZ
Taxonomy Description
The professional activities performed by an Optometrist related to the fitting of contact lenses to an eye, ongoing evaluation of the cornea's ability to sustain successful contact lens wear, and treatment of any external eye or corneal condition which can affect contact lens wear.

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)
1152WC0802XEye and Vision Services Providers

Optometrist
Corneal and Contact Management

204103 (NY)

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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 1770900995, we treat the final digit (5) 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 65. The final step is to find the difference between that total and the next multiple of ten (70 - 65 = 5).

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
7
Unchanged
Pos 3
7
Doubled → 14 → 1 + 4
Pos 4
0
Unchanged
Pos 5
9
Doubled → 18 → 1 + 8
Pos 6
0
Unchanged
Pos 7
0
Doubled → 0
Pos 8
9
Unchanged
Pos 9
9
Doubled → 18 → 1 + 8
Check
5
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 9 → 18 → 9 0 → 0 9 → 18 → 9

Step 2: Add all digits plus the NPI constant

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

2 + 7 + 1 + 4 + 0 + 1 + 8 + 0 + 0 + 9 + 1 + 8 + 24 = 65

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

The next multiple of ten after 65 is 70. The difference is the calculated check digit.

70 - 65 = 5
This NPI is valid
The calculated check digit is 5, which matches the last digit of 1770900995.

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1770900995, enumerated as an "individual" on March 26, 2014.

The provider is located at 138 HARLEY STREET LONDON, LONDON W1G 7 and the phone number is .

Optometrist with taxonomy code 152WC0802X and a focus in Corneal and Contact Management.