MADISON MARIE CALUBAD
NPI 1811833429
Physician Assistant in Lexington, KY

NPI Status: Active since April 27, 2026

Contact Information

205 CHARLES T WETHINGTON BUILDING
LEXINGTON, KY
ZIP 40536
Phone: (859) 257-5001

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

Individual
Female
Physician Assistant

About MADISON CALUBAD

This page provides the complete NPI Profile along with additional information for Madison Calubad, a primary care provider established in Lexington, Kentucky with a medical specialization in Physician Assistant. The healthcare provider is registered in the NPI registry with number 1811833429 assigned on April 2026. The practitioner's primary taxonomy code is 363A00000X. The provider is registered as an individual and her NPI record was last updated April 2026.

NPI: 1811833429
Provider Name: MADISON MARIE CALUBAD
Gender: Female
Entity Type: Individual
Location Address: 205 CHARLES T WETHINGTON BUILDING LEXINGTON, KY 40536
Location Phone: (859) 257-5001
Mailing Address: 2761 RUBY RIVER DR APT 4205 LEXINGTON, KY 40511
Mailing Phone: (304) 942-3705
Is Sole Proprietor?: No
Enumeration Date: 04-27-2026
Last Update Date: 04-27-2026
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A primary care provider (PCP) like Madison Calubad sees people with common medical problems. The primary care provider might be a doctor, physician assistant, nurse practitioner or clinic that are usually involved in your long-term care. A PCP might provide preventive care, treat common medical conditions, identify urgent medical problems and refer you to specialists when necessary. Primary care is usually provided in an outpatient facility but if you are admitted to a hospital your PCP may assist in your care. The most common medical conditions seen by primary care providers are: hypertension, upper respiratory tract infections, depression or anxiety, back pain, arthritis, dermatitis, diabetes, urinary tract infections, 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: Physician Assistant
Taxonomy Code: 363A00000X
Type: Physician Assistants & Advanced Practice Nursing Providers
Taxonomy Description: A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.

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 1811833429, we treat the final digit (9) 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 61. The final step is to find the difference between that total and the next multiple of ten (70 - 61 = 9).

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 → 2

Pos 4

Unchanged

Pos 5

Doubled → 16 → 1 + 6

Pos 6

Unchanged

Pos 7

Doubled → 6

Pos 8

Unchanged

Pos 9

Doubled → 4

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 1 → 2 8 → 16 → 7 3 → 6 2 → 4

Step 2: Add all digits plus the NPI constant

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

2 + 8 + 2 + 1 + 1 + 6 + 3 + 6 + 4 + 4 + 24 = 61

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

The next multiple of ten after 61 is 70. The difference is the calculated check digit.

70 - 61 = 9

This NPI is valid

The calculated check digit is 9, which matches the last digit of 1811833429.