HARLEEN GREWAL M.D.
NPI 1417926387
Internal Medicine in Tulsa, OK

NPI Status: Active since March 14, 2006

Contact Information

2440 E 81ST ST
TULSA, OK
ZIP 74137
Phone: (918) 477-5190
Fax: (918) 477-5199

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  • Individual
  • Female
  • Internal Medicine

About HARLEEN GREWAL

This page provides the complete NPI Profile along with additional information for Harleen Grewal, an internist established in Tulsa, Oklahoma with a medical specialization in Internal Medicine. The healthcare provider is registered in the NPI registry with number 1417926387 assigned on March 2006. The practitioner's primary taxonomy code is 207R00000X with license number 13201 (OK). The provider is registered as an individual and her NPI record was last updated 6 years ago.

NPI
1417926387
Provider Name
HARLEEN GREWAL M.D.
Gender
Female
Entity Type
Individual
Location Address
2440 E 81ST ST TULSA, OK 74137
Location Phone
(918) 477-5190
Location Fax
(918) 477-5199
Mailing Address
402 W MORROW RD 100 SAND SPRINGS, OK 74063
Mailing Phone
(918) 245-2309
Mailing Fax
(918) 477-5199
Is Sole Proprietor?
No
Enumeration Date
03-14-2006
Last Update Date
03-05-2020
Code Navigator

An internist like Harleen Grewal 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.
13201
License State
OK
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.

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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 1417926387, we treat the final digit (7) 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 63. The final step is to find the difference between that total and the next multiple of ten (70 - 63 = 7).

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
4
Unchanged
Pos 3
1
Doubled → 2
Pos 4
7
Unchanged
Pos 5
9
Doubled → 18 → 1 + 8
Pos 6
2
Unchanged
Pos 7
6
Doubled → 12 → 1 + 2
Pos 8
3
Unchanged
Pos 9
8
Doubled → 16 → 1 + 6
Check
7
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 9 → 18 → 9 6 → 12 → 3 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

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

2 + 4 + 2 + 7 + 1 + 8 + 2 + 1 + 2 + 3 + 1 + 6 + 24 = 63

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

The next multiple of ten after 63 is 70. The difference is the calculated check digit.

70 - 63 = 7
This NPI is valid
The calculated check digit is 7, which matches the last digit of 1417926387.

Other Providers at the Same Location


The following 5 providers are registered at the same or a nearby location.

Nurse Practitioner (Family)
2440 E 81ST ST
TULSA, OK 74137
Family Medicine
2440 E 81ST ST
TULSA, OK 74137
Physician Assistant
2440 E 81ST ST
TULSA, OK 74137
Nurse Practitioner (Family)
2440 E 81ST ST
TULSA, OK 74137
Internal Medicine (Infectious Disease)
2440 E 81ST ST
TULSA, OK 74137

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1417926387, enumerated as an "individual" on March 14, 2006.

The provider is located at 2440 E 81ST ST TULSA, OK 74137 and the phone number is (918) 477-5190.

Internal Medicine with taxonomy code 207R00000X.