TAYLOR BOYD COWAN MA
NPI 1265833784
Nurse Practitioner - Psychiatric/Mental Health in Alexandria, VA

NPI Status: Active since September 16, 2014

Contact Information

228 S WASHINGTON ST STE 310
ALEXANDRIA, VA
ZIP 22314
Phone: (917) 841-5184

NPI Profile Information
Primary Taxonomy
Secondary Taxonomies
Medicare Participation & PECOS Status
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Male
Nurse Practitioner
Psychiatric/Mental Health
Opted-Out Medicare

About TAYLOR COWAN

This page provides the complete NPI Profile along with additional information for Taylor Cowan, a provider established in Alexandria, Virginia with a medical specialization in Nurse Practitioner, focusing in psychiatric/mental health . The healthcare provider is registered in the NPI registry with number 1265833784 assigned on September 2014. The practitioner's primary taxonomy code is 363LP0808X with license number AP60670972 (WA). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI: 1265833784
Provider Name: TAYLOR BOYD COWAN MA
Gender: Male
Entity Type: Individual
Location Address: 228 S WASHINGTON ST STE 310 ALEXANDRIA, VA 22314
Location Phone: (917) 841-5184
Mailing Address: 110 PLEASANT ST NW VIENNA, VA 22180
Mailing Phone: (703) 935-0058
Is Sole Proprietor?: No
Enumeration Date: 09-16-2014
Last Update Date: 11-17-2025
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A nurse practitioner (NP) like Taylor Cowan is an experienced registered nurse with a master’s or doctoral degree and advanced clinical training. Nurse practitioners can work in many different specialties including primary care, pediatrics, cardiology, emergency, women’s health, oncology or geriatrics. Nurse practitioners provide services like physical exams, order laboratory tests, manage diseases, write prescriptions, etc.

The provider doesn't accept Medicare and has signed an affidavit to be excluded from the Medicare program. If you are a Medicare beneficiary this means a provider can charge whatever they want for services rendered but must follow certain rules to do so. Taylor Cowan opted out of Medicare effective on 10-01-2022 until 10-01-2026. Opt out periods last for two years and cannot be terminated unless the provider is opting out for the very first time and the affidavit is terminated no later than 90 days after the opt out effective date. Opt-out affidavits might renew automatically renew every two years. The provider opted out of Medicare and cannot order and refer services to other healthcare providers.

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: Nurse Practitioner Psychiatric/Mental Health
Taxonomy Code: 363LP0808X
Type: Physician Assistants & Advanced Practice Nursing Providers
License No.: AP60670972
License State: WA

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No.	Taxonomy Code	Type	Classification / Specialization	License No. (State)
1	101Y00000X	Behavioral Health & Social Service Providers	Counselor	MC60296135 (WA)
2	163W00000X	Nursing Service Providers	Registered Nurse	RN60469022 (WA)

Medicare Participation & PECOS Enrollment Status

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

Opted-Out of Medicare? Yes
Opt-Out Effective Date: 10-01-2022
Opt-Out End Date: 10-01-2026
Eligible to Order and Refer? No

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 1265833784, we treat the final digit (4) 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 66. The final step is to find the difference between that total and the next multiple of ten (70 - 66 = 4).

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 → 12 → 1 + 2

Pos 4

Unchanged

Pos 5

Doubled → 16 → 1 + 6

Pos 6

Unchanged

Pos 7

Doubled → 6

Pos 8

Unchanged

Pos 9

Doubled → 16 → 1 + 6

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 6 → 12 → 3 8 → 16 → 7 3 → 6 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

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

2 + 2 + 1 + 2 + 5 + 1 + 6 + 3 + 6 + 7 + 1 + 6 + 24 = 66

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

The next multiple of ten after 66 is 70. The difference is the calculated check digit.

70 - 66 = 4

This NPI is valid

The calculated check digit is 4, which matches the last digit of 1265833784.