JOSHUA KOEPLIN-DAY PA-C
NPI 1003468331
Physician Assistant - Surgical in La Jolla, CA

NPI Status: Active since July 16, 2019

Contact Information

10710 N TORREY PINES RD
LA JOLLA, CA
ZIP 92037
Phone: (858) 554-7007

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  • Individual
  • Male
  • Years of Experience 2
  • Physician Assistant
  • Surgical
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About JOSHUA KOEPLIN-DAY

This page provides the complete NPI Profile along with additional information for Joshua Koeplin-day, a provider established in La Jolla, California with a medical specialization in Physician Assistant, focusing in surgical and more than 2 years of experience. The healthcare provider is registered in the NPI registry with number 1003468331 assigned on July 2019. The practitioner's primary taxonomy code is 363AS0400X with license number PA66051 (CA). The provider is registered as an individual and his NPI record was last updated January 2026. Joshua Koeplin-day operates as a Multi-Specialty Group with one or more individual practitioners, who practice different areas of specialization.

NPI
1003468331
Provider Name
JOSHUA KOEPLIN-DAY PA-C
Gender
Male
Entity Type
Individual
Location Address
10710 N TORREY PINES RD LA JOLLA, CA 92037
Location Phone
(858) 554-7007
Mailing Address
10790 RANCHO BERNARDO RD SAN DIEGO, CA 92127
Mailing Phone
(858) 554-7007
Medical School Name
OTHER
Graduation Year
2024
Is Sole Proprietor?
Yes
Enumeration Date
07-16-2019
Last Update Date
01-31-2026
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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

Physician Assistant Surgical

Taxonomy Code
363AS0400X
Type
Physician Assistants & Advanced Practice Nursing Providers
License No.
PA66051
License State
CA

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)
1363A00000XPhysician Assistants & Advanced Practice Nursing Providers

Physician Assistant

PA66051 (CA)

Group Taxonomy 193200000X MULTI-SPECIALTY GROUP

This provider is a business group of one or more individual practitioners, who practice with different areas of specialization.

Medicare Participation & PECOS Enrollment Status

Joshua Koeplin-day is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

Joshua Koeplin-day is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

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.

  • Is the provider registered in PECOS? Yes

  • PECOS PAC ID: 4880116912

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20250319000002

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): Yes

  • Eligible to Order or Refer Power Mobility Devices: Yes

Reviews for JOSHUA KOEPLIN-DAY PA-C

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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 1003468331, we treat the final digit (1) 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 59. The final step is to find the difference between that total and the next multiple of ten (60 - 59 = 1).

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
0
Unchanged
Pos 3
0
Doubled → 0
Pos 4
3
Unchanged
Pos 5
4
Doubled → 8
Pos 6
6
Unchanged
Pos 7
8
Doubled → 16 → 1 + 6
Pos 8
3
Unchanged
Pos 9
3
Doubled → 6
Check
1
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 0 → 0 4 → 8 8 → 16 → 7 3 → 6

Step 2: Add all digits plus the NPI constant

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

2 + 0 + 0 + 3 + 8 + 6 + 1 + 6 + 3 + 6 + 24 = 59

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

The next multiple of ten after 59 is 60. The difference is the calculated check digit.

60 - 59 = 1
This NPI is valid
The calculated check digit is 1, which matches the last digit of 1003468331.

Other Providers at the Same Location


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

Radiology (Diagnostic Radiology)
10710 N TORREY PINES RD
LA JOLLA, CA 92037
Orthopaedic Surgery (Hand Surgery)
10710 N TORREY PINES RD
LA JOLLA, CA 92037
Internal Medicine
10710 N TORREY PINES RD
LA JOLLA, CA 92037
Ophthalmology
10710 N TORREY PINES RD
LA JOLLA, CA 92037
Internal Medicine (Hematology & Oncology)
10710 N TORREY PINES RD
LA JOLLA, CA 92037
Colon & Rectal Surgery
10710 N TORREY PINES RD
LA JOLLA, CA 92037
Urology
10710 N TORREY PINES RD
LA JOLLA, CA 92037
Orthopaedic Surgery
10710 N TORREY PINES RD
LA JOLLA, CA 92037
Orthopaedic Surgery (Sports Medicine)
10710 N TORREY PINES RD
LA JOLLA, CA 92037
Emergency Medicine
10710 N TORREY PINES RD
LA JOLLA, CA 92037
Otolaryngology
10710 N TORREY PINES RD
LA JOLLA, CA 92037
Psychiatry & Neurology (Neurology)
10710 N TORREY PINES RD
LA JOLLA, CA 92037
Orthopaedic Surgery
10710 N TORREY PINES RD
LA JOLLA, CA 92037
Internal Medicine
10710 N TORREY PINES RD
LA JOLLA, CA 92037
Optometrist
10710 N TORREY PINES RD
LA JOLLA, CA 92037
Otolaryngology
10710 N TORREY PINES RD
LA JOLLA, CA 92037
Urology
10710 N TORREY PINES RD
LA JOLLA, CA 92037
Internal Medicine
10710 N TORREY PINES RD
LA JOLLA, CA 92037
Orthopaedic Surgery (Orthopaedic Surgery of the Spine)
10710 N TORREY PINES RD
LA JOLLA, CA 92037
Otolaryngology
10710 N TORREY PINES RD
LA JOLLA, CA 92037

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1003468331, enumerated as an "individual" on July 16, 2019.

The provider is located at 10710 N TORREY PINES RD LA JOLLA, CA 92037 and the phone number is (858) 554-7007.

Physician Assistant with taxonomy code 363AS0400X and a focus in Surgical.