DR. MATTHEW DAVID WELBORN OD
NPI 1356187397
Optometrist in San Diego, CA

NPI Status: Active since July 08, 2024

Contact Information

NMCSD OPTOMETRY 34520 BOB WILSON DRIVE
SUITE 203
SAN DIEGO, CA
ZIP 92134
Phone: (619) 532-9830

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  • Individual
  • Male
  • Optometrist

About MATTHEW WELBORN

This page provides the complete NPI Profile along with additional information for Matthew Welborn, a provider established in San Diego, California with a medical specialization in Optometrist. The healthcare provider is registered in the NPI registry with number 1356187397 assigned on July 2024. The practitioner's primary taxonomy code is 152W00000X with license number OPC6529 (FL). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI
1356187397
Provider Name
DR. MATTHEW DAVID WELBORN OD
Gender
Male
Entity Type
Individual
Location Address
NMCSD OPTOMETRY 34520 BOB WILSON DRIVE SUITE 203 SAN DIEGO, CA 92134
Location Phone
(619) 532-9830
Mailing Address
NMCSD OPTOMETRY 34520 BOB WILSON DRIVE SUITE 203 SAN DIEGO, CA 92134
Is Sole Proprietor?
Yes
Enumeration Date
07-08-2024
Last Update Date
09-26-2025
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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

Optometrist

Taxonomy Code
152W00000X
Type
Eye and Vision Services Providers
License No.
OPC6529
License State
FL
Taxonomy Description
Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system.

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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 1356187397, 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
3
Unchanged
Pos 3
5
Doubled → 10 → 1 + 0
Pos 4
6
Unchanged
Pos 5
1
Doubled → 2
Pos 6
8
Unchanged
Pos 7
7
Doubled → 14 → 1 + 4
Pos 8
3
Unchanged
Pos 9
9
Doubled → 18 → 1 + 8
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 5 → 10 → 1 1 → 2 7 → 14 → 5 9 → 18 → 9

Step 2: Add all digits plus the NPI constant

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

2 + 3 + 1 + 0 + 6 + 2 + 8 + 1 + 4 + 3 + 1 + 8 + 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 1356187397.

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1356187397, enumerated as an "individual" on July 08, 2024.

The provider is located at NMCSD OPTOMETRY 34520 BOB WILSON DRIVE SUITE 203 SAN DIEGO, CA 92134 and the phone number is (619) 532-9830.

Optometrist with taxonomy code 152W00000X.