Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

WILLIAM W BENEDICT M.D.
NPI 1902845076
Internal Medicine in Chesterfield, MO

Active since June 05, 2006
226 S WOODS MILL RD, SUITE 56W, CHESTERFIELD, MO 63017(314) 373-2501(314) 373-2508 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.

  • Individual
  • Male
  • Internal Medicine

About WILLIAM BENEDICT

This page provides the complete NPI Profile along with additional information for William Benedict, an internist established in Chesterfield, Missouri with a medical specialization in Internal Medicine. The healthcare provider is registered in the NPI registry with number 1902845076 assigned on June 2006. The practitioner's primary taxonomy code is 207R00000X with license number R6999 (MO). The provider is registered as an individual and his NPI record was last updated July 2026.

NPI
1902845076
Provider Name
WILLIAM W BENEDICT M.D.
Gender
Male
Entity Type
Individual
Location Address
226 S WOODS MILL RD SUITE 56W CHESTERFIELD, MO 63017
Location Phone
(314) 373-2501
Location Fax
(314) 373-2508
Mailing Address
226 S WOODS MILL RD SUITE 56W CHESTERFIELD, MO 63017
Mailing Phone
(314) 373-2501
Mailing Fax
(314) 373-2508
Is Sole Proprietor?
No
Enumeration Date
06-05-2006
Last Update Date
07-13-2026
Code Navigator

An internist like William Benedict is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, etc.

Location Map

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

Internal Medicine

Taxonomy Code
207R00000X
Type
Allopathic & Osteopathic Physicians
License No.
R6999
License State
MO
Taxonomy Description
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

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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 1902845076, we treat the final digit (6) 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 54. The final step is to find the difference between that total and the next multiple of ten (60 - 54 = 6).

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
9
Unchanged
Pos 3
0
Doubled → 0
Pos 4
2
Unchanged
Pos 5
8
Doubled → 16 → 1 + 6
Pos 6
4
Unchanged
Pos 7
5
Doubled → 10 → 1 + 0
Pos 8
0
Unchanged
Pos 9
7
Doubled → 14 → 1 + 4
Check
6
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 8 → 16 → 7 5 → 10 → 1 7 → 14 → 5

Step 2: Add all digits plus the NPI constant

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

2 + 9 + 0 + 2 + 1 + 6 + 4 + 1 + 0 + 0 + 1 + 4 + 24 = 54

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

The next multiple of ten after 54 is 60. The difference is the calculated check digit.

60 - 54 = 6
This NPI is valid
The calculated check digit is 6, which matches the last digit of 1902845076.

Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Otolaryngology
226 S WOODS MILL RD, SUITE 37 WEST
CHESTERFIELD, MO 63017
Internal Medicine (Gastroenterology)
226 S WOODS MILL RD, SUITE 52 WEST
CHESTERFIELD, MO 63017
Internal Medicine (Gastroenterology)
226 S WOODS MILL RD, SUITE 52 WEST
CHESTERFIELD, MO 63017
Internal Medicine (Gastroenterology)
226 S WOODS MILL RD, SUITE 52 WEST
CHESTERFIELD, MO 63017
Internal Medicine (Gastroenterology)
226 S WOODS MILL RD, SUITE 52 WEST
CHESTERFIELD, MO 63017
Internal Medicine
226 S WOODS MILL RD, SUITE 43 WEST
CHESTERFIELD, MO 63017
Internal Medicine
226 S WOODS MILL RD, STE 56 WEST
CHESTERFIELD, MO 63017
Ophthalmology
226 S WOODS MILL RD, SUITE 51 WEST
CHESTERFIELD, MO 63017
Obstetrics & Gynecology
226 S WOODS MILL RD, SUITE 68 WEST
CHESTERFIELD, MO 63017
Obstetrics & Gynecology
226 S WOODS MILL RD, S5W
CHESTERFIELD, MO 63017
Obstetrics & Gynecology
226 S WOODS MILL RD, #55W
CHESTERFIELD, MO 63017
Obstetrics & Gynecology (Gynecology)
226 S WOODS MILL RD, SUITE 55 WEST
CHESTERFIELD, MO 63017
Pediatrics
226 S WOODS MILL RD, 36W
CHESTERFIELD, MO 63017
Obstetrics & Gynecology
226 S WOODS MILL RD, SUITE 60W
CHESTERFIELD, MO 63017
Obstetrics & Gynecology
226 S WOODS MILL RD, SUITE 68 WEST
CHESTERFIELD, MO 63017
Otolaryngology (Otolaryngology/Facial Plastic Surgery)
226 S WOODS MILL RD, SUITE 37W
CHESTERFIELD, MO 63017
Specialist
226 S WOODS MILL RD, SUITE 62 WEST
CHESTERFIELD, MO 63017
Obstetrics & Gynecology
226 S WOODS MILL RD, 55W
CHESTERFIELD, MO 63017
Specialist
226 S WOODS MILL RD, STE 64W
CHESTERFIELD, MO 63017
Obstetrics & Gynecology (Gynecologic Oncology)
226 S WOODS MILL RD, STE 55W
CHESTERFIELD, MO 63017

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1902845076, enumerated as an "individual" on June 05, 2006.

The provider is located at 226 S WOODS MILL RD SUITE 56W CHESTERFIELD, MO 63017 and the phone number is (314) 373-2501.

Internal Medicine with taxonomy code 207R00000X.