ALENNA LOUISE NILSEN MA OF TEACHING
NPI 1134883515
Physician Assistant - Medical in Boulder, CO

NPI Status: Active since October 22, 2021

Contact Information

2500 ARAPAHOE AVE STE 230
BOULDER, CO
ZIP 80302
Phone: (720) 432-4326

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NPPES record last updated: October 22, 2021. Verified against the NPPES registry weekly; last sync: July 12, 2026.

  • Individual
  • Female
  • Physician Assistant
  • Medical

About ALENNA NILSEN

This page provides the complete NPI Profile along with additional information for Alenna Nilsen, a primary care provider established in Boulder, Colorado with a medical specialization in Physician Assistant, focusing in medical . The healthcare provider is registered in the NPI registry with number 1134883515 assigned on October 2021. The practitioner's primary taxonomy code is 363AM0700X with license number 363AM0700X (CO). The provider is registered as an individual and her NPI record was last updated 5 years ago. The organization operates as a Single Specialty Group with one or more individual practitioners, all of who practice with the same area of specialization.

NPI
1134883515
Provider Name
ALENNA LOUISE NILSEN MA OF TEACHING
Gender
Female
Entity Type
Individual
Location Address
2500 ARAPAHOE AVE STE 230 BOULDER, CO 80302
Location Phone
(720) 432-4326
Mailing Address
2500 ARAPAHOE ST STE 230 DENVER, CO 80205
Mailing Phone
(970) 452-1300
Is Sole Proprietor?
Yes
Enumeration Date
10-22-2021
Last Update Date
10-22-2021
Code Navigator

A primary care provider (PCP) like Alenna Nilsen 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 Medical

Taxonomy Code
363AM0700X
Type
Physician Assistants & Advanced Practice Nursing Providers
License No.
363AM0700X
License State
CO

Group Taxonomy 193400000X MULTIPLE SINGLE SPECIALTY GROUP

This provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.

Insurance Plans Accepted

According to publicly available information the provider might be accepting the following health plans from these health insurance companies:

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

*Please verify directly with this provider to make sure your insurance plan is currently accepted.

Additional Identifiers

The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.

Identifier Type / Code Identifier State Identifier Issuer
8255OTHER (01)OREDUCATIONAL ID #

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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 1134883515, we treat the final digit (5) 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 65. The final step is to find the difference between that total and the next multiple of ten (70 - 65 = 5).

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
1
Doubled → 2
Pos 2
1
Unchanged
Pos 3
3
Doubled → 6
Pos 4
4
Unchanged
Pos 5
8
Doubled → 16 → 1 + 6
Pos 6
8
Unchanged
Pos 7
3
Doubled → 6
Pos 8
5
Unchanged
Pos 9
1
Doubled → 2
Check
5
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 3 → 6 8 → 16 → 7 3 → 6 1 → 2

Step 2: Add all digits plus the NPI constant

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

2 + 1 + 6 + 4 + 1 + 6 + 8 + 6 + 5 + 2 + 24 = 65

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

The next multiple of ten after 65 is 70. The difference is the calculated check digit.

70 - 65 = 5
This NPI is valid
The calculated check digit is 5, which matches the last digit of 1134883515.

Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Massage Therapist
2500 ARAPAHOE AVE STE 230
BOULDER, CO 80302
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2500 ARAPAHOE AVE STE 230
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Behavior Analyst
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Behavior Technician
2500 ARAPAHOE AVE STE 230
BOULDER, CO 80302
Behavior Technician
2500 ARAPAHOE AVE STE 230
BOULDER, CO 80302
Behavior Technician
2500 ARAPAHOE AVE STE 230
BOULDER, CO 80302
Behavior Analyst
2500 ARAPAHOE AVE STE 230
BOULDER, CO 80302
Behavior Technician
2500 ARAPAHOE AVE STE 230
BOULDER, CO 80302
Behavior Technician
2500 ARAPAHOE AVE STE 230
BOULDER, CO 80302
Behavior Technician
2500 ARAPAHOE AVE STE 230
BOULDER, CO 80302
Behavior Technician
2500 ARAPAHOE AVE STE 230
BOULDER, CO 80302
Behavior Technician
2500 ARAPAHOE AVE STE 230
BOULDER, CO 80302
Behavior Technician
2500 ARAPAHOE AVE STE 230
BOULDER, CO 80302
Behavior Technician
2500 ARAPAHOE AVE STE 230
BOULDER, CO 80302
Behavior Technician
2500 ARAPAHOE AVE STE 230
BOULDER, CO 80302
Behavior Technician
2500 ARAPAHOE AVE STE 230
BOULDER, CO 80302
Behavior Technician
2500 ARAPAHOE AVE STE 230
BOULDER, CO 80302
Behavior Technician
2500 ARAPAHOE AVE STE 230
BOULDER, CO 80302
Behavior Technician
2500 ARAPAHOE AVE STE 230
BOULDER, CO 80302
Behavior Technician
2500 ARAPAHOE AVE STE 230
BOULDER, CO 80302

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1134883515, enumerated as an "individual" on October 22, 2021.

The provider is located at 2500 ARAPAHOE AVE STE 230 BOULDER, CO 80302 and the phone number is (720) 432-4326.

Physician Assistant with taxonomy code 363AM0700X and a focus in Medical.

The provider might be accepting Accepts: Medicare and Medicaid. Please consult your insurance carrier or call the provider to verify.