THOMAS M KENNEFICK MD
NPI 1639148737
Internal Medicine - Nephrology in Portland, OR

Active since March 14, 2006
9155 SW BARNES RD STE 402, PORTLAND, OR 97225(503) 292-7704(503) 292-7046 Get Directions Write a Review

NPPES record last updated: July 12, 2023. Verified against the NPPES registry weekly; last sync: July 19, 2026.

Record update history: Jul 12, 2023, Jun 30, 2021, Jun 26, 2018 (3 updates tracked since 2018).

  • Individual
  • Male
  • Internal Medicine
  • Nephrology

About THOMAS KENNEFICK

This page provides the complete NPI Profile along with additional information for Thomas Kennefick, an internist established in Portland, Oregon with a medical specialization in Internal Medicine, focusing in nephrology . The healthcare provider is registered in the NPI registry with number 1639148737 assigned on March 2006. The practitioner's primary taxonomy code is 207RN0300X with license number MD16837 (OR). The provider is registered as an individual and his NPI record was last updated 3 years ago.

NPI
1639148737
Provider Name
THOMAS M KENNEFICK MD
Gender
Male
Entity Type
Individual
Location Address
9155 SW BARNES RD STE 402 PORTLAND, OR 97225
Location Phone
(503) 292-7704
Location Fax
(503) 292-7046
Mailing Address
1130 NW 22ND AVE STE 640 PORTLAND, OR 97210
Mailing Phone
(503) 229-7976
Mailing Fax
(503) 274-4867
Is Sole Proprietor?
No
Enumeration Date
03-14-2006
Last Update Date
07-12-2023
Code Navigator

An internist like Thomas Kennefick 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

Secondary Locations

  • 9701 SW Barnes Rd Ste 110
    Portland, OR 97225
    (503) 595-6675

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 Nephrology

Taxonomy Code
207RN0300X
Type
Allopathic & Osteopathic Physicians
License No.
MD16837
License State
OR
Taxonomy Description
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.

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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 1639148737, 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 73. The final step is to find the difference between that total and the next multiple of ten (80 - 73 = 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
6
Unchanged
Pos 3
3
Doubled → 6
Pos 4
9
Unchanged
Pos 5
1
Doubled → 2
Pos 6
4
Unchanged
Pos 7
8
Doubled → 16 → 1 + 6
Pos 8
7
Unchanged
Pos 9
3
Doubled → 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 3 → 6 1 → 2 8 → 16 → 7 3 → 6

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 6 + 9 + 2 + 4 + 1 + 6 + 7 + 6 + 24 = 73

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

The next multiple of ten after 73 is 80. The difference is the calculated check digit.

80 - 73 = 7
This NPI is valid
The calculated check digit is 7, which matches the last digit of 1639148737.

Other Providers at the Same Location


The following 7 providers are registered at the same or a nearby location.

Internal Medicine (Nephrology)
9155 SW BARNES RD STE 402
PORTLAND, OR 97225
Internal Medicine (Nephrology)
9155 SW BARNES RD STE 402
PORTLAND, OR 97225
Internal Medicine (Nephrology)
9155 SW BARNES RD STE 402
PORTLAND, OR 97225
Physician Assistant (Medical)
9155 SW BARNES RD STE 402
PORTLAND, OR 97225
Internal Medicine (Nephrology)
9155 SW BARNES RD STE 402
PORTLAND, OR 97225
Internal Medicine (Nephrology)
9155 SW BARNES RD STE 402
PORTLAND, OR 97225
Physician Assistant (Medical)
9155 SW BARNES RD STE 402
PORTLAND, OR 97225

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1639148737, enumerated as an "individual" on March 14, 2006.

The provider is located at 9155 SW BARNES RD STE 402 PORTLAND, OR 97225 and the phone number is (503) 292-7704.

Internal Medicine with taxonomy code 207RN0300X and a focus in Nephrology.