ROBERT J RENTFRO III MD
NPI 1639114184
Physical Medicine & Rehabilitation - Pain Medicine in Lincoln, NE

NPI Status: Active since June 18, 2006

Contact Information

6900 A ST STE 100
LINCOLN, NE
ZIP 68510
Phone: (402) 436-2000
Fax: (402) 434-2691

NPI Profile Information
Primary Taxonomy
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Male
Physical Medicine & Rehabilitation
Pain Medicine

About ROBERT RENTFRO

This page provides the complete NPI Profile along with additional information for Robert Rentfro, a provider established in Lincoln, Nebraska with a medical specialization in Physical Medicine & Rehabilitation, focusing in pain medicine . The healthcare provider is registered in the NPI registry with number 1639114184 assigned on June 2006. The practitioner's primary taxonomy code is 2081P2900X with license number 25794 (NE). The provider is registered as an individual and his NPI record was last updated 7 years ago.

NPI: 1639114184
Provider Name: ROBERT J RENTFRO III MD
Gender: Male
Entity Type: Individual
Location Address: 6900 A ST STE 100 LINCOLN, NE 68510
Location Phone: (402) 436-2000
Location Fax: (402) 434-2691
Mailing Address: 6900 A ST STE 100 LINCOLN, NE 68510
Mailing Phone: (402) 436-2000
Mailing Fax: (402) 434-2691
Is Sole Proprietor?: No
Enumeration Date: 06-18-2006
Last Update Date: 10-12-2019
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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: Physical Medicine & Rehabilitation Pain Medicine
Taxonomy Code: 2081P2900X
Type: Allopathic & Osteopathic Physicians
License No.: 25794
License State: NE
Taxonomy Description: A physician who provides a high level of care, either as a primary physician or consultant, for patients experiencing problems with acute, chronic or cancer pain in both hospital and ambulatory settings. Patient care needs may also be coordinated with other specialists.

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 1639114184, we treat the final digit (4) 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 66. The final step is to find the difference between that total and the next multiple of ten (70 - 66 = 4).

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

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 6

Pos 4

Unchanged

Pos 5

Doubled → 2

Pos 6

Unchanged

Pos 7

Doubled → 8

Pos 8

Unchanged

Pos 9

Doubled → 16 → 1 + 6

Check

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 3 → 6 1 → 2 4 → 8 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 6 + 9 + 2 + 1 + 8 + 1 + 1 + 6 + 24 = 66

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

The next multiple of ten after 66 is 70. The difference is the calculated check digit.

70 - 66 = 4

This NPI is valid

The calculated check digit is 4, which matches the last digit of 1639114184.