DR. SHANNON GRETHEL PSY.D.
NPI 1629256607
Clinical Neuropsychologist in Vallejo, CA
NPI Status: Active since February 01, 2008
Contact Information
975 SERENO DR
KFRC- NEUROPSYCHOLOGY DEPARTMENT
VALLEJO, CA
ZIP 94589
Phone: (832) 370-7960
- Individual
- Female
- Clinical Neuropsychologist
- Opted-Out Medicare
About SHANNON GRETHEL
This page provides the complete NPI Profile along with additional information for Shannon Grethel, a provider established in Vallejo, California with a medical specialization in Clinical Neuropsychologist. The healthcare provider is registered in the NPI registry with number 1629256607 assigned on February 2008. The practitioner's primary taxonomy code is 103G00000X with license number PSY21763 (CA). The provider is registered as an individual and her NPI record was last updated 17 years ago.
- NPI
- 1629256607
- Provider Name
- DR. SHANNON GRETHEL PSY.D.
- Gender
- Female
- Entity Type
- Individual
- Location Address
- 975 SERENO DR KFRC- NEUROPSYCHOLOGY DEPARTMENT VALLEJO, CA 94589
- Location Phone
- (832) 370-7960
- Mailing Address
- 975 SERENO DR KFRC- NEUROPSYCHOLOGY DEPARTMENT VALLEJO, CA 94589
- Mailing Phone
- (707) 651-4547
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 02-01-2008
- Last Update Date
- 05-22-2009
- Code Navigator
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. Shannon Grethel opted out of Medicare effective on 01-01-2024 until 01-01-2026. 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
Clinical Neuropsychologist
- Taxonomy Code
- 103G00000X
- Type
- Behavioral Health & Social Service Providers
- License No.
- PSY21763
- License State
- CA
- Taxonomy Description
- A clinical psychologist who applies principles of assessment and intervention based upon the scientific study of human behavior as it relates to normal and abnormal functioning of the central nervous system. The specialty is dedicated to enhancing the understanding of brain-behavior relationships and the application of such knowledge to human problems.
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: 01-01-2024
Opt-Out End Date: 01-01-2026
Eligible to Order and Refer? No
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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 1629256607, 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.
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 63 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.
VALLEJO, CA 94589
VALLEJO, CA 94589
VALLEJO, CA 94589
VALLEJO, CA 94589
VALLEJO, CA 94589
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1629256607, enumerated as an "individual" on February 01, 2008.
The provider is located at 975 SERENO DR KFRC- NEUROPSYCHOLOGY DEPARTMENT VALLEJO, CA 94589 and the phone number is (832) 370-7960.
Clinical Neuropsychologist with taxonomy code 103G00000X.
