MARJORIE J. SLADEK ARNP
NPI 1619116498
Nurse Practitioner - Adult Health in Federal Way, WA
NPI Status: Active since February 18, 2009
Contact Information
34509 9TH AVE S
SUITE 200
FEDERAL WAY, WA
ZIP 98003
Phone: (253) 927-4777
Fax: (253) 565-8777
Some details in this NPI profile have been updated in the NPI registry within the last 30 days.
- Individual
- Female
- Nurse Practitioner
- Adult Health
About MARJORIE SLADEK
This page provides the complete NPI Profile along with additional information for Marjorie Sladek, a provider established in Federal Way, Washington with a medical specialization in Nurse Practitioner, focusing in adult health . The healthcare provider is registered in the NPI registry with number 1619116498 assigned on February 2009. The practitioner's primary taxonomy code is 363LA2200X with license number AP60056902 (WA). The provider is registered as an individual and her NPI record was last updated July 2026.
- NPI
- 1619116498
- Provider Name
- MARJORIE J. SLADEK ARNP
- Other Name
- MARJORIE CORRELL
- Other Name Type
- Former Name (1)
- Gender
- Female
- Entity Type
- Individual
- Location Address
- 34509 9TH AVE S SUITE 200 FEDERAL WAY, WA 98003
- Location Phone
- (253) 927-4777
- Location Fax
- (253) 565-8777
- Mailing Address
- 34509 9TH AVE S SUITE 200 FEDERAL WAY, WA 98003
- Mailing Phone
- (253) 927-4777
- Mailing Fax
- (253) 565-8777
- Is Sole Proprietor?
- No
- Enumeration Date
- 02-18-2009
- Last Update Date
- 07-05-2026
- Code Navigator
A nurse practitioner (NP) like Marjorie Sladek 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.
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 Adult Health
- Taxonomy Code
- 363LA2200X
- Type
- Physician Assistants & Advanced Practice Nursing Providers
- License No.
- AP60056902
- License State
- WA
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 |
|---|---|---|---|
| 0259643 | OTHER (01) | WA | STATE L&I |
| 0246151 | OTHER (01) | WA | STATE L&I |
| 0259633 | OTHER (01) | WA | STATE L&I |
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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 1619116498, we treat the final digit (8) 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 62. The final step is to find the difference between that total and the next multiple of ten (70 - 62 = 8).
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.
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.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 62 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 20 providers are registered at the same or a nearby location.
FEDERAL WAY, WA 98003
FEDERAL WAY, WA 98003
FEDERAL WAY, WA 98003
FEDERAL WAY, WA 98003
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1619116498, enumerated as an "individual" on February 18, 2009.
The provider is located at 34509 9TH AVE S SUITE 200 FEDERAL WAY, WA 98003 and the phone number is (253) 927-4777.
Nurse Practitioner with taxonomy code 363LA2200X and a focus in Adult Health.
The provider might be accepting Accepts: Medicare and Medicaid. Please consult your insurance carrier or call the provider to verify.
