DR. MICHAEL OBERHOFER MD
NPI 1689767808
Radiology - Vascular & Interventional Radiology in Park Ridge, IL

NPI Status: Active since October 02, 2006

Contact Information

1775 DEMPSTER ST
PARK RIDGE, IL
ZIP 60068
Phone: (847) 723-6040
Fax: (847) 759-1009

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

Individual
Male
Radiology
Vascular & Interventional Radiology

About MICHAEL OBERHOFER

This page provides the complete NPI Profile along with additional information for Michael Oberhofer, a provider established in Park Ridge, Illinois with a medical specialization in Radiology, focusing in vascular & interventional radiology . The healthcare provider is registered in the NPI registry with number 1689767808 assigned on October 2006. The practitioner's primary taxonomy code is 2085R0204X. The provider is registered as an individual and his NPI record was last updated one year ago.

NPI: 1689767808
Provider Name: DR. MICHAEL OBERHOFER MD
Gender: Male
Entity Type: Individual
Location Address: 1775 DEMPSTER ST PARK RIDGE, IL 60068
Location Phone: (847) 723-6040
Location Fax: (847) 759-1009
Mailing Address: 249 S RIVER RD DES PLAINES, IL 60016
Mailing Phone: (847) 759-1005
Mailing Fax: (847) 759-1009
Is Sole Proprietor?: No
Enumeration Date: 10-02-2006
Last Update Date: 09-11-2025
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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: Radiology Vascular & Interventional Radiology
Taxonomy Code: 2085R0204X
Type: Allopathic & Osteopathic Physicians
License State: IL
Taxonomy Description: A radiologist who diagnoses and treats diseases by various radiologic imaging modalities. These include fluoroscopy, digital radiography, computed tomography, sonography and magnetic resonance imaging.

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)
1	207UN0901X	Allopathic & Osteopathic Physicians	Nuclear Medicine Nuclear Cardiology	(IL)
2	207UN0902X	Allopathic & Osteopathic Physicians	Nuclear Medicine Nuclear Imaging & Therapy	(IL)

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 1689767808, 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 72. The final step is to find the difference between that total and the next multiple of ten (80 - 72 = 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

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 16 → 1 + 6

Pos 4

Unchanged

Pos 5

Doubled → 14 → 1 + 4

Pos 6

Unchanged

Pos 7

Doubled → 14 → 1 + 4

Pos 8

Unchanged

Pos 9

Doubled → 0

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 8 → 16 → 7 7 → 14 → 5 7 → 14 → 5 0 → 0

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 1 + 6 + 9 + 1 + 4 + 6 + 1 + 4 + 8 + 0 + 24 = 72

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

The next multiple of ten after 72 is 80. The difference is the calculated check digit.

80 - 72 = 8

This NPI is valid

The calculated check digit is 8, which matches the last digit of 1689767808.