MARGOT A. WILLIAMS, D.O., P.C.
NPI 1619783057
Clinic/Center - Medical Specialty in Colorado Springs, CO

NPI Status: Active since December 10, 2024

Contact Information

6915 TUTT BLVD STE 110B
COLORADO SPRINGS, CO
ZIP 80923
Phone: (719) 266-5944

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

Organization
Clinic/Center
Medical Specialty
CLIA Number: 06D2001256
CLIA Cert. Type: Physician Office
CLIA Exp. Date: 12-14-2027

About MARGOT A. WILLIAMS, D.O., P.C.

This page provides the complete NPI Profile along with additional information for Margot A. Williams, D.o., P.c., a provider established in Colorado Springs, Colorado operating as a Clinic/center, focusing in medical specialty . The healthcare provider is registered in the NPI registry with number 1619783057 assigned on December 2024. The practitioner's primary taxonomy code is 261QM2500X. The provider is registered as an organization and their NPI record was last updated March 2026. The authorized official of this NPI record is Margot Anne Crossley (Owner)

NPI: 1619783057
Provider Name: MARGOT A. WILLIAMS, D.O., P.C.
Entity Type: Organization
Location Address: 6915 TUTT BLVD STE 110B COLORADO SPRINGS, CO 80923
Location Phone: (719) 266-5944
Mailing Address: 6915 TUTT BLVD STE 110B COLORADO SPRINGS, CO 80923
Mailing Phone: (719) 266-5944
Is Sole Proprietor?: No
Is Organization Subpart?: No
Enumeration Date: 12-10-2024
Last Update Date: 03-11-2026
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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: Clinic/Center Medical Specialty
Taxonomy Code: 261QM2500X
Type: Ambulatory Health Care Facilities
Taxonomy Description: An entity, facility, or distinct part of a facility providing diagnostic, treatment, and prescriptive services related to a specific area of medical specialization. Frequently used for Title V related Children's Specialty services or to meet specific public health needs (e.g., infectious diseases or breast and cervical cancer).

Authorized Official

The authorized official is the designated individual with the legal authority to make changes to the provider’s official NPI record. For organizations, the authorized official must be a general partner, chairman of the board, CEO, CFO or a direct owner holding at least a 5 percent stake in the medical organization.

Authorized Official Name: MARGOT ANNE CROSSLEY
Authorized Official Title: OWNER
Authorized Official Phone: (719) 266-5944

CLIA Information

The Clinical Laboratory Improvement Amendments (CLIA) of 1988 applies to facilities or sites that test human specimens for health assessment or to diagnose, prevent, or treat disease. The CLIA Program sets standards for clinical laboratory testing and issues certificates. The NPI / CLIA crosswalk information for this NPI number is:

CLIA Number: 06D2001256
Facility Type: Physician Office
Certificate Effective Date: December 15, 2025
Certificate Expiration Date: December 14, 2027
Laboratory Director: DR. MARGOT A. CROSSLEY
Certificate Type: Certificate of Waiver
Certificate Type Description: This CLIA certificate is issued to Margot A. Williams, D.o., P.c. to perform only waived tests. CLIA defines waived tests as simple tests with a low risk for an incorrect result. Waived tests include certain tests listed in CLIA regulations, tests cleared by the FDA for home use and tests approved by the FDA for waived status and that meet CLIA waiver criteria.

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 1619783057, 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 63. The final step is to find the difference between that total and the next multiple of ten (70 - 63 = 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

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 2

Pos 4

Unchanged

Pos 5

Doubled → 14 → 1 + 4

Pos 6

Unchanged

Pos 7

Doubled → 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 1 → 2 7 → 14 → 5 3 → 6 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 + 2 + 9 + 1 + 4 + 8 + 6 + 0 + 1 + 0 + 24 = 63

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

The next multiple of ten after 63 is 70. The difference is the calculated check digit.

70 - 63 = 7

This NPI is valid

The calculated check digit is 7, which matches the last digit of 1619783057.