THOMAS KLARQUIST, PC
NPI 1710103148
Internal Medicine in Chicago, IL

NPI Status: Active since April 17, 2007

Contact Information

111 N WABASH AVE
SUITE 600
CHICAGO, IL
ZIP 60602
Phone: (312) 332-0844
Fax: (312) 332-0847

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  • Organization
  • Internal Medicine

About THOMAS KLARQUIST, PC

This page provides the complete NPI Profile along with additional information for Thomas Klarquist, Pc, an internist established in Chicago, Illinois operating as a Internal Medicine. The healthcare provider is registered in the NPI registry with number 1710103148 assigned on April 2007. The practitioner's primary taxonomy code is 207R00000X. The provider is registered as an organization and their NPI record was last updated 6 years ago. The organization operates as a Single Specialty Group with one or more individual practitioners, all of who practice with the same area of specialization. The authorized official of this NPI record is Dr. Thomas Edwin Klarquist Md (President)

NPI
1710103148
Provider Name
THOMAS KLARQUIST, PC
Entity Type
Organization
Location Address
111 N WABASH AVE SUITE 600 CHICAGO, IL 60602
Location Phone
(312) 332-0844
Location Fax
(312) 332-0847
Mailing Address
111 N WABASH AVE SUITE 600 CHICAGO, IL 60602
Mailing Phone
(312) 332-0844
Mailing Fax
(312) 332-0847
Is Sole Proprietor?
No
Is Organization Subpart?
No
Enumeration Date
04-17-2007
Last Update Date
08-22-2020
Code Navigator

An internist like Thomas Klarquist, Pc 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 State
IL
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.

Group Taxonomy 193400000X SINGLE SPECIALTY GROUP

This provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.

Authorized Official

The authorized official is the designated individual with the legal authority to make changes to the provider’s official NPI record. For organizations, the authorized official must be a general partner, chairman of the board, CEO, CFO or a direct owner holding at least a 5 percent stake in the medical organization.

Authorized Official Name

DR. THOMAS EDWIN KLARQUIST MD

Authorized Official Title
PRESIDENT
Authorized Official Phone
(312) 332-0844

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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 1710103148, 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 52. The final step is to find the difference between that total and the next multiple of ten (60 - 52 = 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
1
Doubled → 2
Pos 2
7
Unchanged
Pos 3
1
Doubled → 2
Pos 4
0
Unchanged
Pos 5
1
Doubled → 2
Pos 6
0
Unchanged
Pos 7
3
Doubled → 6
Pos 8
1
Unchanged
Pos 9
4
Doubled → 8
Check
8
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 1 → 2 1 → 2 3 → 6 4 → 8

Step 2: Add all digits plus the NPI constant

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

2 + 7 + 2 + 0 + 2 + 0 + 6 + 1 + 8 + 24 = 52

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

The next multiple of ten after 52 is 60. The difference is the calculated check digit.

60 - 52 = 8
This NPI is valid
The calculated check digit is 8, which matches the last digit of 1710103148.

Other Providers at the Same Location


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

Psychologist (Clinical)
111 N WABASH AVE, STE 1408
CHICAGO, IL 60602
Ophthalmology
111 N WABASH AVE, STE 1722
CHICAGO, IL 60602
Ophthalmology
111 N WABASH AVE, SUITE1610
CHICAGO, IL 60602
Dentist (General Practice)
111 N WABASH AVE, SUITE 2020
CHICAGO, IL 60602
Internal Medicine
111 N WABASH AVE, SUITE 1710
CHICAGO, IL 60602
Ophthalmology
111 N WABASH AVE, STE 1810
CHICAGO, IL 60602
Internal Medicine (Cardiovascular Disease)
111 N WABASH AVE, STE 1416
CHICAGO, IL 60602
Chiropractor
111 N WABASH AVE, SUITE 600
CHICAGO, IL 60602
Internal Medicine (Cardiovascular Disease)
111 N WABASH AVE, SUITE 1210
CHICAGO, IL 60602
Social Worker (Clinical)
111 N WABASH AVE, SUITE 1408
CHICAGO, IL 60602
Psychologist (Clinical)
111 N WABASH AVE, SUITE 1422
CHICAGO, IL 60602
Podiatrist (Foot & Ankle Surgery)
111 N WABASH AVE, SUITE 1914
CHICAGO, IL 60602
Dentist (General Practice)
111 N WABASH AVE, #1921
CHICAGO, IL 60602
Podiatrist (Foot & Ankle Surgery)
111 N WABASH AVE, SUITE 1914
CHICAGO, IL 60602
Psychiatry & Neurology (Psychiatry)
111 N WABASH AVE, STE 1323
CHICAGO, IL 60602
Podiatrist (Foot & Ankle Surgery)
111 N WABASH AVE, STE 1914
CHICAGO, IL 60602
Psychiatry & Neurology (Psychiatry)
111 N WABASH AVE, #2101
CHICAGO, IL 60602
Specialist
111 N WABASH AVE, 1008
CHICAGO, IL 60602
Psychiatry & Neurology (Psychiatry)
111 N WABASH AVE, SUITE 1218
CHICAGO, IL 60602
Counselor (Mental Health)
111 N WABASH AVE, SUITE 1804
CHICAGO, IL 60602

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1710103148, enumerated as an "organization" on April 17, 2007.

The provider is located at 111 N WABASH AVE SUITE 600 CHICAGO, IL 60602 and the phone number is (312) 332-0844.

Internal Medicine with taxonomy code 207R00000X.