GREGORY L CRAMER MD
NPI 1104807833
Internal Medicine - Gastroenterology in Lacrosse, WI

NPI Status: Active since November 09, 2005

Contact Information

800 WEST AVENUE SOUTH
LACROSSE, WI
ZIP 54601
Phone: (608) 392-9862
Fax: (608) 392-9821

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  • Individual
  • Male
  • Internal Medicine
  • Gastroenterology

About GREGORY CRAMER

This page provides the complete NPI Profile along with additional information for Gregory Cramer, an internist established in Lacrosse, Wisconsin with a medical specialization in Internal Medicine, focusing in gastroenterology . The healthcare provider is registered in the NPI registry with number 1104807833 assigned on November 2005. The practitioner's primary taxonomy code is 207RG0100X with license number 30194 (WI). The provider is registered as an individual and his NPI record was last updated 7 years ago.

NPI
1104807833
Provider Name
GREGORY L CRAMER MD
Gender
Male
Entity Type
Individual
Location Address
800 WEST AVENUE SOUTH LACROSSE, WI 54601
Location Phone
(608) 392-9862
Location Fax
(608) 392-9821
Mailing Address
PO BOX 1510 EAU CLAIRE, WI 54702
Mailing Phone
(608) 785-0940
Is Sole Proprietor?
No
Enumeration Date
11-09-2005
Last Update Date
05-17-2019
Code Navigator

An internist like Gregory Cramer 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 Gastroenterology

Taxonomy Code
207RG0100X
Type
Allopathic & Osteopathic Physicians
License No.
30194
License State
WI
Taxonomy Description
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

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)
1207RG0100XAllopathic & Osteopathic Physicians

Internal Medicine
Gastroenterology

31457 (IA)

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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 1104807833, we treat the final digit (3) 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 57. The final step is to find the difference between that total and the next multiple of ten (60 - 57 = 3).

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
1
Unchanged
Pos 3
0
Doubled → 0
Pos 4
4
Unchanged
Pos 5
8
Doubled → 16 → 1 + 6
Pos 6
0
Unchanged
Pos 7
7
Doubled → 14 → 1 + 4
Pos 8
8
Unchanged
Pos 9
3
Doubled → 6
Check
3
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 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 + 0 + 4 + 1 + 6 + 0 + 1 + 4 + 8 + 6 + 24 = 57

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

The next multiple of ten after 57 is 60. The difference is the calculated check digit.

60 - 57 = 3
This NPI is valid
The calculated check digit is 3, which matches the last digit of 1104807833.

Other Providers at the Same Location


The following 6 providers are registered at the same or a nearby location.

Nurse Practitioner (Gerontology)
800 WEST AVENUE SOUTH
LA CROSSE, WI 54601
Family Medicine
800 WEST AVENUE SOUTH
LA CROSSE, WI 54601
Internal Medicine (Critical Care Medicine)
800 WEST AVENUE SOUTH
LACROSSE, WI 54601
Physician Assistant
800 WEST AVENUE SOUTH
LA CROSSE, WI 54601
Nurse Practitioner
800 WEST AVENUE SOUTH
LA CROSSE, WI 54601
Clinic/Center (Multi-Specialty)
800 WEST AVENUE SOUTH
LACROSSE, WI 54601

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1104807833, enumerated as an "individual" on November 09, 2005.

The provider is located at 800 WEST AVENUE SOUTH LACROSSE, WI 54601 and the phone number is (608) 392-9862.

Internal Medicine with taxonomy code 207RG0100X and a focus in Gastroenterology.