DR. KELLY DEAN JOHNSTON MD
NPI 1053591198
Orthopaedic Surgery in San Diego, CA

NPI Status: Active since November 06, 2007

Contact Information

7910 FROST ST STE 200
SAN DIEGO, CA
ZIP 92123
Phone: (858) 278-8300
Fax: (858) 278-1708

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  • Individual
  • Male
  • Orthopaedic Surgery

About KELLY JOHNSTON

This page provides the complete NPI Profile along with additional information for Kelly Johnston, a provider established in San Diego, California with a medical specialization in Orthopaedic Surgery. The healthcare provider is registered in the NPI registry with number 1053591198 assigned on November 2007. The practitioner's primary taxonomy code is 207X00000X with license number A101851 (CA). The provider is registered as an individual and his NPI record was last updated 19 years ago.

NPI
1053591198
Provider Name
DR. KELLY DEAN JOHNSTON MD
Gender
Male
Entity Type
Individual
Location Address
7910 FROST ST STE 200 SAN DIEGO, CA 92123
Location Phone
(858) 278-8300
Location Fax
(858) 278-1708
Mailing Address
7910 FROST ST STE 200 SAN DIEGO, CA 92123
Mailing Phone
(858) 278-8300
Mailing Fax
(858) 278-1708
Is Sole Proprietor?
No
Enumeration Date
11-06-2007
Last Update Date
11-06-2007
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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

Taxonomy Code
207X00000X
Type
Allopathic & Osteopathic Physicians
License No.
A101851
License State
CA
Taxonomy Description
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.

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)
1207XS0114XAllopathic & Osteopathic Physicians

Orthopaedic Surgery
Adult Reconstructive Orthopaedic Surgery

A101851 (CA)

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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 1053591198, 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 52. The final step is to find the difference between that total and the next multiple of ten (60 - 52 = 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
0
Unchanged
Pos 3
5
Doubled → 10 → 1 + 0
Pos 4
3
Unchanged
Pos 5
5
Doubled → 10 → 1 + 0
Pos 6
9
Unchanged
Pos 7
1
Doubled → 2
Pos 8
1
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 5 → 10 → 1 5 → 10 → 1 1 → 2 9 → 18 → 9

Step 2: Add all digits plus the NPI constant

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

2 + 0 + 1 + 0 + 3 + 1 + 0 + 9 + 2 + 1 + 1 + 8 + 24 = 52

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

The next multiple of ten after 52 is 60. The difference is the calculated check digit.

60 - 52 = 8
This NPI is valid
The calculated check digit is 8, which matches the last digit of 1053591198.

Other Providers at the Same Location


The following 10 providers are registered at the same or a nearby location.

Orthopaedic Surgery
7910 FROST ST STE 200
SAN DIEGO, CA 92123
Orthopaedic Surgery
7910 FROST ST STE 200
SAN DIEGO, CA 92123
Specialist
7910 FROST ST STE 200
SAN DIEGO, CA 92123
Nurse Practitioner (Pediatrics)
7910 FROST ST STE 200
SAN DIEGO, CA 92123
Ophthalmology (Pediatric Ophthalmology and Strabismus Specialist)
7910 FROST ST STE 200
SAN DIEGO, CA 92123
Optometrist
7910 FROST ST STE 200
SAN DIEGO, CA 92123
Optometrist
7910 FROST ST STE 200
SAN DIEGO, CA 92123
Pediatrics (Pediatric Endocrinology)
7910 FROST ST STE 200
SAN DIEGO, CA 92123
Optometrist
7910 FROST ST STE 200
SAN DIEGO, CA 92123
Physician Assistant (Medical)
7910 FROST ST STE 200
SAN DIEGO, CA 92123

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1053591198, enumerated as an "individual" on November 06, 2007.

The provider is located at 7910 FROST ST STE 200 SAN DIEGO, CA 92123 and the phone number is (858) 278-8300.

Orthopaedic Surgery with taxonomy code 207X00000X.