GERARD J. ERKER PHD
NPI 1023052479
Clinical Neuropsychologist in Saint Louis, MO

NPI Status: Active since June 16, 2006

Contact Information

6420 CLAYTON RD
6TH FLOOR
SAINT LOUIS, MO
ZIP 63117
Phone: (314) 768-5205
Fax: (314) 768-5315

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  • Individual
  • Male
  • Years of Experience 42
  • Clinical Neuropsychologist
  • Accepts Insurance
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About GERARD ERKER

This page provides the complete NPI Profile along with additional information for Gerard Erker, a provider established in Saint Louis, Missouri with a medical specialization in Clinical Neuropsychologist and more than 42 years of experience. He graduated from Saint Louis University School Of Medicine in 1984. The healthcare provider is registered in the NPI registry with number 1023052479 assigned on June 2006. The practitioner's primary taxonomy code is 103G00000X with license number PY01284 (MO). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI
1023052479
Provider Name
GERARD J. ERKER PHD
Gender
Male
Entity Type
Individual
Location Address
6420 CLAYTON RD 6TH FLOOR SAINT LOUIS, MO 63117
Location Phone
(314) 768-5205
Location Fax
(314) 768-5315
Mailing Address
1836 LACKLAND HILL PKWY ATTNT: CREDENTIALING DEPARTMENT SAINT LOUIS, MO 63146
Mailing Phone
(314) 989-0300
Mailing Fax
(314) 768-5315
Medical School Name
SAINT LOUIS UNIVERSITY SCHOOL OF MEDICINE
Graduation Year
1984
Is Sole Proprietor?
No
Enumeration Date
06-16-2006
Last Update Date
09-11-2025
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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

Clinical Neuropsychologist

Taxonomy Code
103G00000X
Type
Behavioral Health & Social Service Providers
License No.
PY01284
License State
MO
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.

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)
1103TC0700XBehavioral Health & Social Service Providers

Psychologist
Clinical

01284 (MO)

Insurance Plans Accepted

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

  • Choice Bronze HSA (QualChoice) - POS
  • Complete Gold - PPO
  • Complete Gold + Vision + Adult Dental - PPO
  • Connected Silver - PPO
  • Connected Silver (QualChoice) - POS
  • Connected Silver (QualChoice) + Vision + Adult Dental - POS
  • Connected Silver (QualChoiceLife) - PPO
  • Connected Silver (QualChoiceLife) + Vision + Adult Dental - PPO
  • Connected Silver + Vision + Adult Dental - PPO
  • Elite Bronze - PPO
  • Complete Gold - EPO
  • Complete Gold + Vision + Adult Dental - EPO
  • Complete Silver - EPO
  • Complete Silver + Vision + Adult Dental - EPO
  • Elite Bronze - EPO
  • Elite Bronze + Vision + Adult Dental - EPO
  • Everyday Bronze - EPO
  • Everyday Bronze + Vision + Adult Dental - EPO
  • Everyday Gold - EPO
  • Everyday Gold + Vision + Adult Dental - EPO
  • Elite Bronze - EPO
  • Elite Bronze + Vision + Adult Dental - EPO
  • Elite Gold - EPO
  • Elite Gold + Vision + Adult Dental - EPO
  • Everyday Bronze - EPO
  • Everyday Bronze + Vision + Adult Dental - EPO
  • Everyday Gold - EPO
  • Everyday Gold + Vision + Adult Dental - EPO
  • Focused Silver - EPO
  • Focused Silver + Vision + Adult Dental - EPO
  • Choice Bronze HSA - EPO
  • Choice Bronze HSA + Vision + Adult Dental - EPO
  • Clear Gold - EPO
  • Clear Gold + Vision + Adult Dental - EPO
  • Complete Gold - HMO
  • Complete Gold + Vision + Adult Dental - HMO
  • Elite Bronze - EPO
  • Elite Bronze - HMO
  • Elite Bronze + Vision + Adult Dental - EPO
  • Elite Bronze + Vision + Adult Dental - HMO
  • Clear Gold - EPO
  • Clear Gold + Vision + Adult Dental - EPO
  • Complete Gold - EPO
  • Complete Gold + Vision + Adult Dental - EPO
  • Elite Silver - EPO
  • Elite Silver + Vision + Adult Dental - EPO
  • Everyday Bronze - EPO
  • Everyday Bronze + Vision + Adult Dental - EPO
  • Focused Silver - EPO
  • Focused Silver + Vision + Adult Dental - EPO
  • Elite Bronze - PPO
  • Elite Bronze + Vision + Adult Dental - PPO
  • Elite Gold - PPO
  • Elite Gold + Vision + Adult Dental - PPO
  • Enhanced Asthma/COPD Care Silver with $0 Drug Options - PPO
  • Enhanced Asthma/COPD Care Silver with $0 Drug Options + Vision + Adult Dental - PPO
  • Enhanced Diabetes Care Silver with $0 Drug Options - PPO
  • Enhanced Diabetes Care Silver with $0 Drug Options + Vision + Adult Dental - PPO
  • Everyday Bronze - PPO
  • Everyday Bronze + Vision + Adult Dental - PPO
  • Elite Bronze - EPO
  • Elite Bronze + Vision + Adult Dental - EPO
  • Elite Gold - EPO
  • Elite Gold + Vision + Adult Dental - EPO
  • Enhanced Diabetes Care Silver with $0 Drug Options - EPO
  • Enhanced Diabetes Care Silver with $0 Drug Options + Vision + Adult Dental - EPO
  • Everyday Bronze - EPO
  • Everyday Bronze + Vision + Adult Dental - EPO
  • Everyday Gold - EPO
  • Everyday Gold + Vision + Adult Dental - EPO
  • Anthem Bronze Pathway 10150 ($0 Virtual PCP + $0 Select Drugs + Incentives) - EPO
  • Anthem Bronze Pathway 6900 ($0 Virtual PCP + $0 Select Drugs + Incentives) - EPO
  • Anthem Bronze Pathway 7500 Standard ($0 Virtual PCP + $0 Select Drugs + Incentives) - EPO
  • Anthem Catastrophic Pathway (+ Incentives) - EPO
  • Anthem Gold Pathway 2000 Standard ($0 Virtual PCP + $0 Select Drugs + Incentives) - EPO
  • Anthem Heart Healthy Bronze Pathway 4900 ($0 Virtual PCP + $0 Select Drugs + Incentives) - EPO
  • Anthem Heart Healthy Silver Pathway 3100 ($0 Virtual PCP + $0 Select Drugs + Incentives) - EPO
  • Anthem Silver Pathway 5350 ($0 Virtual PCP + $0 Select Drugs + Incentives) - EPO
  • Anthem Silver Pathway 6000 Standard ($0 Virtual PCP + $0 Select Drugs + Incentives) - EPO
  • Anthem Silver Pathway 7200 ($0 Virtual PCP + $0 Select Drugs + Incentives) - EPO

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

Medicare Participation & PECOS Enrollment Status

Gerard Erker 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.

Gerard Erker 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 and Durable Medical Equipment (DME).

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: 8628108123

    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: I20100609000976

    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): No

  • Eligible to Order or Refer Power Mobility Devices: No

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

Exam of neurobehavioral status, first hour

An exam of neurobehavioral status is a medical procedure that evaluates your brain's functions. This includes assessing your cognitive abilities, emotional responses, and behavioral patterns. The first hour of the exam is typically dedicated to this initial evaluation.

This service was performed 141 times for 126 patients

Treatment of behavior impacting health, initial 30 minutes

This service involves a healthcare professional working with you for 30 minutes to address behaviors that are negatively affecting your health. They will help you understand and modify these behaviors, improving your overall well-being.

This service was performed 147 times for 77 patients

Reviews for GERARD J. ERKER PHD

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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 1023052479, we treat the final digit (9) 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 51. The final step is to find the difference between that total and the next multiple of ten (60 - 51 = 9).

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
2
Doubled → 4
Pos 4
3
Unchanged
Pos 5
0
Doubled → 0
Pos 6
5
Unchanged
Pos 7
2
Doubled → 4
Pos 8
4
Unchanged
Pos 9
7
Doubled → 14 → 1 + 4
Check
9
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 2 → 4 0 → 0 2 → 4 7 → 14 → 5

Step 2: Add all digits plus the NPI constant

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

2 + 0 + 4 + 3 + 0 + 5 + 4 + 4 + 1 + 4 + 24 = 51

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

The next multiple of ten after 51 is 60. The difference is the calculated check digit.

60 - 51 = 9
This NPI is valid
The calculated check digit is 9, which matches the last digit of 1023052479.

Other Providers at the Same Location


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

Pathology (Anatomic Pathology & Clinical Pathology)
6420 CLAYTON RD
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Pathology (Anatomic Pathology & Clinical Pathology)
6420 CLAYTON RD
SAINT LOUIS, MO 63117
Pathology (Anatomic Pathology & Clinical Pathology)
6420 CLAYTON RD
SAINT LOUIS, MO 63117
Pathology (Anatomic Pathology & Clinical Pathology)
6420 CLAYTON RD
SAINT LOUIS, MO 63117
Anesthesiology
6420 CLAYTON RD
SAINT LOUIS, MO 63117
Anesthesiology
6420 CLAYTON RD
SAINT LOUIS, MO 63117
Nurse Anesthetist, Certified Registered
6420 CLAYTON RD
SAINT LOUIS, MO 63117
Nurse Anesthetist, Certified Registered
6420 CLAYTON RD
SAINT LOUIS, MO 63117
Anesthesiology
6420 CLAYTON RD
SAINT LOUIS, MO 63117
Internal Medicine (Critical Care Medicine)
6420 CLAYTON RD
SAINT LOUIS, MO 63117
Nurse Anesthetist, Certified Registered
6420 CLAYTON RD
SAINT LOUIS, MO 63117
Radiology (Body Imaging)
6420 CLAYTON RD
SAINT LOUIS, MO 63117
Radiology (Diagnostic Radiology)
6420 CLAYTON RD
SAINT LOUIS, MO 63117
Radiology (Diagnostic Radiology)
6420 CLAYTON RD
SAINT LOUIS, MO 63117
Nurse Anesthetist, Certified Registered
6420 CLAYTON RD
SAINT LOUIS, MO 63117
Nurse Anesthetist, Certified Registered
6420 CLAYTON RD
SAINT LOUIS, MO 63117
Nurse Anesthetist, Certified Registered
6420 CLAYTON RD
SAINT LOUIS, MO 63117
Nurse Anesthetist, Certified Registered
6420 CLAYTON RD
SAINT LOUIS, MO 63117
Nurse Anesthetist, Certified Registered
6420 CLAYTON RD
SAINT LOUIS, MO 63117
Nurse Anesthetist, Certified Registered
6420 CLAYTON RD
SAINT LOUIS, MO 63117

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1023052479, enumerated as an "individual" on June 16, 2006.

The provider is located at 6420 CLAYTON RD 6TH FLOOR SAINT LOUIS, MO 63117 and the phone number is (314) 768-5205.

Clinical Neuropsychologist with taxonomy code 103G00000X.

The provider might be accepting Accepts: Ambetter from Arkansas Health & Wellness, Ambetter. Please consult your insurance carrier or call the provider to verify.