DR. DAN S GRINSTEAD M.D.
NPI 1881668010
Internal Medicine in Walla Walla, WA

NPI Status: Active since February 14, 2006

Contact Information

55 W TIETAN ST
WALLA WALLA, WA
ZIP 99362
Phone: (509) 525-3720
Fax: (509) 522-1588

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

Individual
Male
Internal Medicine

About DAN GRINSTEAD

This page provides the complete NPI Profile along with additional information for Dan Grinstead, an internist established in Walla Walla, Washington with a medical specialization in Internal Medicine. The healthcare provider is registered in the NPI registry with number 1881668010 assigned on February 2006. The practitioner's primary taxonomy code is 207R00000X with license number MD00044572 (WA). The provider is registered as an individual and his NPI record was last updated 19 years ago.

NPI: 1881668010
Provider Name: DR. DAN S GRINSTEAD M.D.
Gender: Male
Entity Type: Individual
Location Address: 55 W TIETAN ST WALLA WALLA, WA 99362
Location Phone: (509) 525-3720
Location Fax: (509) 522-1588
Mailing Address: 55 W TIETAN ST WALLA WALLA, WA 99362
Mailing Phone: (509) 525-3720
Mailing Fax: (509) 522-1588
Is Sole Proprietor?: No
Enumeration Date: 02-14-2006
Last Update Date: 11-27-2007
Code Navigator

An internist like Dan Grinstead 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 No.: MD00044572
License State: WA
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.

Insurance Plans Accepted

According to publicly available information the provider might be accepting the following health plans from these health insurance companies:

Medicare

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

Medicaid

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

*Please verify directly with this provider to make sure your insurance plan is currently accepted.

Additional Identifiers

The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.

Identifier	Type / Code	Identifier State	Identifier Issuer
P00201205	OTHER (01)	WA	RAIL ROAD MEDICARE
8418337	MEDICAID (05)	WA
0194945	OTHER (01)	WA	L&I
A72945	MEDICARE UPIN (02)	WA
023157	MEDICAID (05)	OR
G8851280	MEDICARE PIN (08)	WA

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 1881668010, 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 → 16 → 1 + 6

Pos 4

Unchanged

Pos 5

Doubled → 12 → 1 + 2

Pos 6

Unchanged

Pos 7

Doubled → 16 → 1 + 6

Pos 8

Unchanged

Pos 9

Doubled → 2

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 6 → 12 → 3 8 → 16 → 7 1 → 2

Step 2: Add all digits plus the NPI constant

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

2 + 8 + 1 + 6 + 1 + 1 + 2 + 6 + 1 + 6 + 0 + 2 + 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 1881668010.