JOHN O'FEE
NPI 1578203956
Internal Medicine in La Jolla, CA

NPI Status: Active since March 31, 2022

Contact Information

9888 GENESEE AVE
LA JOLLA, CA
ZIP 92037
Phone: (858) 834-1798

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

Individual
Male
Internal Medicine

About JOHN O'FEE

This page provides the complete NPI Profile along with additional information for John O'fee, an internist established in La Jolla, California with a medical specialization in Internal Medicine. The healthcare provider is registered in the NPI registry with number 1578203956 assigned on March 2022. The practitioner's primary taxonomy code is 207R00000X with license number A190011 (CA). The provider is registered as an individual and his NPI record was last updated July 2025.

NPI: 1578203956
Provider Name: JOHN O'FEE
Gender: Male
Entity Type: Individual
Location Address: 9888 GENESEE AVE LA JOLLA, CA 92037
Location Phone: (858) 834-1798
Mailing Address: 9850 GENESEE AVE STE 900 LA JOLLA, CA 92037
Is Sole Proprietor?: No
Enumeration Date: 03-31-2022
Last Update Date: 07-13-2025
Code Navigator

An internist like John O'fee 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.: A190011
License State: CA
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.

NPI Validation Check Digit Calculation

The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.

Start with the original NPI number, the last digit is the check digit and is not used in the calculation.
1	5	7	8	2	0	3	9	5	6
Step 1: Double the value of the alternate digits, beginning with the rightmost digit.
2	5	14	8	4	0	6	9	10
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24.
2 + 5 + 1 + 4 + 8 + 4 + 0 + 6 + 9 + 1 + 0 + 24 = 64
Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit.
70 - 64 = 6									6

The NPI number 1578203956 is valid because the calculated check digit 6 using the Luhn validation algorithm matches the last digit of the original NPI number.

Other Providers at the Same Location

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

GREGORY DANIEL MEDLEY PHARM. D.

Pharmacist

9888 GENESEE AVE
LJ-18
LA JOLLA, CA
ZIP 92037

About JOHN O'FEE

Location Map

Specialty - Primary Taxonomy

Internal Medicine

Reviews for JOHN O'FEE

NPI Validation Check Digit Calculation

Other Providers at the Same Location

Frequently Asked Questions

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