DR. HOWARD MALCOLM DAVIES JR. O.D.
NPI 1649483298
Optometrist in Langley Park, MD

NPI Status: Active since May 08, 2007

Contact Information

7953 NEW HAMPSHIRE AVENUE
LANGLEY PARK, MD
ZIP 20783
Phone: (301) 439-6241

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  • Individual
  • Male
  • Optometrist

About HOWARD DAVIES

This page provides the complete NPI Profile along with additional information for Howard Davies, a provider established in Langley Park, Maryland with a medical specialization in Optometrist. The healthcare provider is registered in the NPI registry with number 1649483298 assigned on May 2007. The practitioner's primary taxonomy code is 152W00000X with license number DA0695 (MD). The provider is registered as an individual and his NPI record was last updated 15 years ago.

NPI
1649483298
Provider Name
DR. HOWARD MALCOLM DAVIES JR. O.D.
Gender
Male
Entity Type
Individual
Location Address
7953 NEW HAMPSHIRE AVENUE LANGLEY PARK, MD 20783
Location Phone
(301) 439-6241
Mailing Address
7953 NEW HAMPSHIRE AVENUE LANGLEY PARK, MD 20783
Mailing Phone
(301) 439-6241
Is Sole Proprietor?
Yes
Enumeration Date
05-08-2007
Last Update Date
07-08-2011
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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.
DA0695
License State
MD
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 1649483298, we treat the final digit (8) 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 82. The final step is to find the difference between that total and the next multiple of ten (90 - 82 = 8).

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
6
Unchanged
Pos 3
4
Doubled → 8
Pos 4
9
Unchanged
Pos 5
4
Doubled → 8
Pos 6
8
Unchanged
Pos 7
3
Doubled → 6
Pos 8
2
Unchanged
Pos 9
9
Doubled → 18 → 1 + 8
Check
8
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 4 → 8 4 → 8 3 → 6 9 → 18 → 9

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 8 + 9 + 8 + 8 + 6 + 2 + 1 + 8 + 24 = 82

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

The next multiple of ten after 82 is 90. The difference is the calculated check digit.

90 - 82 = 8
This NPI is valid
The calculated check digit is 8, which matches the last digit of 1649483298.

Other Providers at the Same Location


The following 1 provider is registered at the same or a nearby location.

Optometrist
7953 NEW HAMPSHIRE AVENUE
LANGLEY PARK, MD 20783

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1649483298, enumerated as an "individual" on May 08, 2007.

The provider is located at 7953 NEW HAMPSHIRE AVENUE LANGLEY PARK, MD 20783 and the phone number is (301) 439-6241.

Optometrist with taxonomy code 152W00000X.