GREGORY P PENNING R.T.(R)(CT)ARRT
NPI 1124767330
Radiology - Diagnostic Radiology in Santa Rosa, CA

NPI Status: Active since June 04, 2022

Contact Information

30 MARK WEST SPRINGS RD
SANTA ROSA, CA
ZIP 95403
Phone: (707) 576-4000

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

Individual
Male
Radiology
Diagnostic Radiology

About GREGORY PENNING

This page provides the complete NPI Profile along with additional information for Gregory Penning, a provider established in Santa Rosa, California with a medical specialization in Radiology, focusing in diagnostic radiology . The healthcare provider is registered in the NPI registry with number 1124767330 assigned on June 2022. The practitioner's primary taxonomy code is 2085R0202X with license number RHF00097211 (CA). The provider is registered as an individual and his NPI record was last updated 4 years ago.

NPI: 1124767330
Provider Name: GREGORY P PENNING R.T.(R)(CT)ARRT
Gender: Male
Entity Type: Individual
Location Address: 30 MARK WEST SPRINGS RD SANTA ROSA, CA 95403
Location Phone: (707) 576-4000
Mailing Address: 30 MARK WEST SPRINGS RD SANTA ROSA, CA 95403
Mailing Phone: (707) 576-4000
Is Sole Proprietor?: No
Enumeration Date: 06-04-2022
Last Update Date: 06-04-2022
Code Navigator

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: Radiology Diagnostic Radiology
Taxonomy Code: 2085R0202X
Type: Allopathic & Osteopathic Physicians
License No.: RHF00097211
License State: CA
Taxonomy Description: A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.

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 1124767330, we treat the final digit (0) 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 60. The final step is to find the difference between that total and the next multiple of ten (60 - 60 = 0).

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 → 4

Pos 4

Unchanged

Pos 5

Doubled → 14 → 1 + 4

Pos 6

Unchanged

Pos 7

Doubled → 14 → 1 + 4

Pos 8

Unchanged

Pos 9

Doubled → 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 2 → 4 7 → 14 → 5 7 → 14 → 5 3 → 6

Step 2: Add all digits plus the NPI constant

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

2 + 1 + 4 + 4 + 1 + 4 + 6 + 1 + 4 + 3 + 6 + 24 = 60

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

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

60 - 60 = 0

This NPI is valid

The calculated check digit is 0, which matches the last digit of 1124767330.