DR. GREGORY IAN FIELDS PHD
NPI 1902852783
Psychologist - Clinical in Sacramento, CA

NPI Status: Active since May 25, 2006

Contact Information

2825 J ST
SUITE 435
SACRAMENTO, CA
ZIP 95816
Phone: (916) 425-3177

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  • Individual
  • Male
  • Years of Experience 29
  • Psychologist
  • Clinical
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About GREGORY FIELDS

This page provides the complete NPI Profile along with additional information for Gregory Fields, a provider established in Sacramento, California with a medical specialization in Psychologist, focusing in clinical and more than 29 years of experience. He graduated from Texas Tech University Health Science Center School Of Medicine in 1997. The healthcare provider is registered in the NPI registry with number 1902852783 assigned on May 2006. The practitioner's primary taxonomy code is 103TC0700X with license number PSY16113 (CA). The provider is registered as an individual and his NPI record was last updated 13 years ago.

NPI
1902852783
Provider Name
DR. GREGORY IAN FIELDS PHD
Gender
Male
Entity Type
Individual
Location Address
2825 J ST SUITE 435 SACRAMENTO, CA 95816
Location Phone
(916) 425-3177
Mailing Address
2825 J ST SUITE 435 SACRAMENTO, CA 95816
Mailing Phone
(916) 425-3177
Medical School Name
TEXAS TECH UNIVERSITY HEALTH SCIENCE CENTER SCHOOL OF MEDICINE
Graduation Year
1997
Is Sole Proprietor?
No
Enumeration Date
05-25-2006
Last Update Date
08-12-2013
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A clinical psychologist like Gregory Fields assesses, diagnoses, and treats mental, emotional, and behavioral disorders. Clinical psychologists help people deal with problems ranging from short-term personal issues to severe, chronic conditions. Clinical psychologists interview patients, give diagnostic tests, provide psychotherapy and design behavior modification programs to help patients.

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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

Psychologist Clinical

Taxonomy Code
103TC0700X
Type
Behavioral Health & Social Service Providers
License No.
PSY16113
License State
CA
Taxonomy Description
A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.

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
ZZZ17916ZMEDICARE ID-TYPE UNSPECIFIED (04)CA 
ZZZ04183ZMEDICARE PIN (08) 
OPL161132MEDICARE PIN (08)CA 

Medicare Participation & PECOS Enrollment Status

Gregory Fields 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.

Gregory Fields 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: 6608873393

    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: I20061020000438

    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.

Administration of psychological or neuropsychological test, each additional 30 minutes

This procedure involves administering psychological or neuropsychological tests to evaluate your mental functions. Each additional 30 minutes allows for a more in-depth assessment of your cognitive abilities, emotions, and behavior. It's crucial for accurate diagnosis and treatment planning.

This service was performed 95 times for 44 patients

Administration of psychological or neuropsychological test, first 30 minutes

This procedure involves a health professional conducting a psychological or neuropsychological test. The first 30 minutes typically involve understanding your mental health or brain function through various assessments. This helps in diagnosing and treating mental health disorders effectively.

This service was performed 45 times for 44 patients

Evaluation of neuropsychological test, each additional hour

This service involves further evaluation of your neuropsychological test results beyond the initial hour. It helps to understand your cognitive functioning better, focusing on areas like memory, attention, and problem-solving skills.

This service was performed 53 times for 15 patients

Evaluation of neuropsychological test, first hour

An evaluation of neuropsychological tests is a process to assess your brain's function. It involves tasks designed to measure cognitive abilities such as memory, attention, problem-solving, and language skills. The first hour involves initial testing and observation.

This service was performed 15 times for 15 patients

Evaluation of psychological test, each additional hour

This service involves additional hours spent on assessing psychological tests. It helps to understand your mental health better, identifying any potential issues or disorders. It's a crucial step in creating an effective treatment plan.

This service was performed 32 times for 29 patients

Evaluation of psychological test, first hour

This procedure involves a professional assessing your mental health using standardized tests. It's the initial hour of a process that helps understand your emotional well-being and cognitive abilities. It's completely non-invasive and confidential.

This service was performed 30 times for 29 patients

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 15 times for 15 patients

Psychiatric diagnostic evaluation

A psychiatric diagnostic evaluation is a thorough assessment used to identify any mental health conditions you may have. It involves a detailed discussion about your symptoms, thoughts, feelings and behavior patterns. Your medical history and family's mental health history are also considered.

This service was performed 30 times for 29 patients

Physician Visit Costs



The typical physician office visit costs for Medicare beneficiaries in this area are: $45.21 for a new patient copayment and $26.48 for an established patient copayment.

The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.

For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.

The prices below reflect the costs for new and established patients in the 95816 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99205

  • Average New Patient Price $180.85
  • Minimum New Patient Price $60.44
  • Maximum New Patient Price $180.85
  • Average New Patient Copayment $45.21
  • Minimum New Patient Copayment $15.11
  • Maximum New Patient Copayment $45.21

Established Patients Visit Costs *

The most utilized procedure code for established patients office visits is 99214

  • Average Established Patient Price $105.95
  • Minimum Established Patient Price $19.88
  • Maximum Established Patient Price $148.15
  • Average Established Patient Copayment $26.48
  • Minimum Established Patient Copayment $4.97
  • Maximum Established Patient Copayment $37.03

* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.

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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 1902852783, we treat the final digit (3) 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 67. The final step is to find the difference between that total and the next multiple of ten (70 - 67 = 3).

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
9
Unchanged
Pos 3
0
Doubled → 0
Pos 4
2
Unchanged
Pos 5
8
Doubled → 16 → 1 + 6
Pos 6
5
Unchanged
Pos 7
2
Doubled → 4
Pos 8
7
Unchanged
Pos 9
8
Doubled → 16 → 1 + 6
Check
3
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 8 → 16 → 7 2 → 4 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

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

2 + 9 + 0 + 2 + 1 + 6 + 5 + 4 + 7 + 1 + 6 + 24 = 67

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

The next multiple of ten after 67 is 70. The difference is the calculated check digit.

70 - 67 = 3
This NPI is valid
The calculated check digit is 3, which matches the last digit of 1902852783.

Other Providers at the Same Location


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

Internal Medicine
2825 J ST, SUITE 300
SACRAMENTO, CA 95816
Internal Medicine
2825 J ST, STE#300
SACRAMENTO, CA 95816
Physical Medicine & Rehabilitation (Pain Medicine)
2825 J ST, STE. 435
SACRAMENTO, CA 95816
Internal Medicine
2825 J ST, SUITE 300
SACRAMENTO, CA 95816
Internal Medicine
2825 J ST, SUITE 300
SACRAMENTO, CA 95816
Internal Medicine
2825 J ST
SACRAMENTO, CA 95816
Internal Medicine
2825 J ST, SUITE #300
SACRAMENTO, CA 95816
Registered Nurse
2825 J ST, STE 400
SACRAMENTO, CA 95816
Internal Medicine
2825 J ST, SUITE 300
SACRAMENTO, CA 95816
Internal Medicine (Obesity Medicine)
2825 J ST, SUITE 435
SACRAMENTO, CA 95816
Dietitian, Registered
2825 J ST, STE 435
SACRAMENTO, CA 95816
Specialist
2825 J ST, SUITE 235
SACRAMENTO, CA 95816
Physical Therapist
2825 J ST, SUITE 440
SACRAMENTO, CA 95816
Physical Medicine & Rehabilitation (Sports Medicine)
2825 J ST, SUITE 440
SACRAMENTO, CA 95816
Physical Medicine & Rehabilitation (Sports Medicine)
2825 J ST, SUITE 440
SACRAMENTO, CA 95816
Clinic/Center (Medical Specialty)
2825 J ST, SUITE 400
SACRAMENTO, CA 95816
Dietitian, Registered
2825 J ST, SUITE 435
SACRAMENTO, CA 95816
Internal Medicine (Endocrinology, Diabetes & Metabolism)
2825 J ST, SUITE 435
SACRAMENTO, CA 95816
Nurse Practitioner (Obstetrics & Gynecology)
2825 J ST
SACRAMENTO, CA 95816
Dietitian, Registered
2825 J ST, 435
SACRAMENTO, CA 95816

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1902852783, enumerated as an "individual" on May 25, 2006.

The provider is located at 2825 J ST SUITE 435 SACRAMENTO, CA 95816 and the phone number is (916) 425-3177.

Psychologist with taxonomy code 103TC0700X and a focus in Clinical.

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