PATRICK EMERSON DAY MD
NPI 1003376138
Pediatrics - Pediatric Cardiology in Austin, TX
NPI Status: Active since March 24, 2019
Contact Information
4900 MUELLER BLVD
AUSTIN, TX
ZIP 78723
Phone: (512) 324-0000
Some details in this NPI profile have been updated in the NPI registry within the last 30 days.
- Individual
- Male
- Pediatrics
- Pediatric Cardiology
About PATRICK DAY
This page provides the complete NPI Profile along with additional information for Patrick Day, a pediatrician established in Austin, Texas with a medical specialization in Pediatrics, focusing in pediatric cardiology . The healthcare provider is registered in the NPI registry with number 1003376138 assigned on March 2019. The practitioner's primary taxonomy code is 2080P0202X with license number T6547 (TX). The provider is registered as an individual and his NPI record was last updated June 2026.
- NPI
- 1003376138
- Provider Name
- PATRICK EMERSON DAY MD
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 4900 MUELLER BLVD AUSTIN, TX 78723
- Location Phone
- (512) 324-0000
- Mailing Address
- 5904 AYLFORD CT AUSTIN, TX 78739
- Mailing Phone
- (713) 705-4303
- Is Sole Proprietor?
- No
- Enumeration Date
- 03-24-2019
- Last Update Date
- 06-04-2026
- Code Navigator
A pediatrician like Patrick Day is a physician who has completed a pediatric residency and is board-certified or board-eligible in a pediatric specialty. Pediatric care providers are trained to care for newborns, infants, children and adolescents. A pediatrician could perform physical exams, manage vaccinations, monitor development milestones, diagnose illnesses, infections, injuries or other health problems, 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
Pediatrics Pediatric Cardiology
- Taxonomy Code
- 2080P0202X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- T6547
- License State
- TX
- Taxonomy Description
- A pediatric cardiologist provides comprehensive care to patients with cardiovascular problems. This specialist is skilled in selecting, performing and evaluating the structural and functional assessment of the heart and blood vessels, and the clinical evaluation of cardiovascular disease.
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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 1003376138, we treat the final digit (8) 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 52. The final step is to find the difference between that total and the next multiple of ten (60 - 52 = 8).
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.
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.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 52 is 60. The difference is the calculated check digit.
Other Providers at the Same Location
The following 20 providers are registered at the same or a nearby location.
AUSTIN, TX 78723
AUSTIN, TX 78723
AUSTIN, TX 78723
AUSTIN, TX 78723
AUSTIN, TX 78723
AUSTIN, TX 78723
AUSTIN, TX 78723
AUSTIN, TX 78723
AUSTIN, TX 78723
AUSTIN, TX 78723
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1003376138, enumerated as an "individual" on March 24, 2019.
The provider is located at 4900 MUELLER BLVD AUSTIN, TX 78723 and the phone number is (512) 324-0000.
Pediatrics with taxonomy code 2080P0202X and a focus in Pediatric Cardiology.
