DR. DENNIS WAYNE EHRLICH MD
NPI 1689788051
Internal Medicine - Geriatric Medicine in La Jolla, CA

NPI Status: Active since August 19, 2006

Contact Information

8950 VILLA LA JOLLA DR STE C129
LA JOLLA, CA
ZIP 92037
Phone: (858) 450-5900
Fax: (858) 450-5903

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

Individual
Male
Internal Medicine
Geriatric Medicine

About DENNIS EHRLICH

This page provides the complete NPI Profile along with additional information for Dennis Ehrlich, an internist established in La Jolla, California with a medical specialization in Internal Medicine, focusing in geriatric medicine . The healthcare provider is registered in the NPI registry with number 1689788051 assigned on August 2006. The practitioner's primary taxonomy code is 207RG0300X with license number G45623 (CA). The provider is registered as an individual and his NPI record was last updated 3 years ago.

NPI: 1689788051
Provider Name: DR. DENNIS WAYNE EHRLICH MD
Gender: Male
Entity Type: Individual
Location Address: 8950 VILLA LA JOLLA DR STE C129 LA JOLLA, CA 92037
Location Phone: (858) 450-5900
Location Fax: (858) 450-5903
Mailing Address: 8950 VILLA LA JOLLA DR STE C129 LA JOLLA, CA 92037
Mailing Phone: (858) 450-5900
Mailing Fax: (858) 450-5903
Is Sole Proprietor?: No
Enumeration Date: 08-19-2006
Last Update Date: 03-07-2023
Code Navigator

An internist like Dennis Ehrlich 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 Geriatric Medicine
Taxonomy Code: 207RG0300X
Type: Allopathic & Osteopathic Physicians
License No.: G45623
License State: CA
Taxonomy Description: An internist who has special knowledge of the aging process and special skills in the diagnostic, therapeutic, preventive and rehabilitative aspects of illness in the elderly. This specialist cares for geriatric patients in the patient's home, the office, long-term care settings such as nursing homes and the hospital.

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

Established patient office or other outpatient visit, 20-29 minutes
Established patient office or other outpatient visit, 30-39 minutes
Established patient office or other outpatient visit, 40-54 minutes

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 1689788051, we treat the final digit (1) 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 69. The final step is to find the difference between that total and the next multiple of ten (70 - 69 = 1).

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 → 14 → 1 + 4

Pos 6

Unchanged

Pos 7

Doubled → 16 → 1 + 6

Pos 8

Unchanged

Pos 9

Doubled → 10 → 1 + 0

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 7 → 14 → 5 8 → 16 → 7 5 → 10 → 1

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 1 + 6 + 9 + 1 + 4 + 8 + 1 + 6 + 0 + 1 + 0 + 24 = 69

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

The next multiple of ten after 69 is 70. The difference is the calculated check digit.

70 - 69 = 1

This NPI is valid

The calculated check digit is 1, which matches the last digit of 1689788051.