DR. DAVID FREDERICK WILLAT DC
NPI 1104160795
Chiropractor - Independent Medical Examiner in Santa Rosa, CA

NPI Status: Active since November 20, 2012

Contact Information

5742 OWLS NEST DR
SANTA ROSA, CA
ZIP 95409
Phone: (707) 537-1036
Fax: (707) 537-1261

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  • Individual
  • Male
  • Chiropractor
  • Independent Medical Examiner

About DAVID WILLAT

This page provides the complete NPI Profile along with additional information for David Willat, a provider established in Santa Rosa, California with a medical specialization in Chiropractor, focusing in independent medical examiner . The healthcare provider is registered in the NPI registry with number 1104160795 assigned on November 2012. The practitioner's primary taxonomy code is 111NI0013X with license number 16088 (CA). The provider is registered as an individual and his NPI record was last updated 14 years ago.

NPI
1104160795
Provider Name
DR. DAVID FREDERICK WILLAT DC
Gender
Male
Entity Type
Individual
Location Address
5742 OWLS NEST DR SANTA ROSA, CA 95409
Location Phone
(707) 537-1036
Location Fax
(707) 537-1261
Mailing Address
5742 OWLS NEST DR SANTA ROSA, CA 95409
Mailing Phone
(707) 537-1036
Mailing Fax
(707) 537-1261
Is Sole Proprietor?
Yes
Enumeration Date
11-20-2012
Last Update Date
11-20-2012
Code Navigator

A chiropractor like David Willat helps patients with problems of the neuromusculoskeletal system, which includes nerves, bones, muscles, ligaments, and tendons. Chiropractors use spinal adjustments and manipulation, as well as other clinical interventions, to manage health issues such as back and neck pain. Some chiropractors apply procedures like massage therapy, rehabilitative exercise, ultrasound and spinal adjustments and manipulation. A chiropractor focuses on the patients overall health and might refer patients to other healthcare professionals if necessary.

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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

Chiropractor Independent Medical Examiner

Taxonomy Code
111NI0013X
Type
Chiropractic Providers
License No.
16088
License State
CA
Taxonomy Description
A chiropractor and special evaluator not involved with the medical care of the individual examinee that impartially evaluates the care being provided by other practitioners to clarify clinical, disability, liability or other case issues.

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)
1111NX0800XChiropractic Providers

Chiropractor
Orthopedic

16088 (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 1104160795, 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 55. The final step is to find the difference between that total and the next multiple of ten (60 - 55 = 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
1
Unchanged
Pos 3
0
Doubled → 0
Pos 4
4
Unchanged
Pos 5
1
Doubled → 2
Pos 6
6
Unchanged
Pos 7
0
Doubled → 0
Pos 8
7
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 0 → 0 1 → 2 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 + 1 + 0 + 4 + 2 + 6 + 0 + 7 + 1 + 8 + 24 = 55

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

The next multiple of ten after 55 is 60. The difference is the calculated check digit.

60 - 55 = 5
This NPI is valid
The calculated check digit is 5, which matches the last digit of 1104160795.

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1104160795, enumerated as an "individual" on November 20, 2012.

The provider is located at 5742 OWLS NEST DR SANTA ROSA, CA 95409 and the phone number is (707) 537-1036.

Chiropractor with taxonomy code 111NI0013X and a focus in Independent Medical Examiner.