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
- 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 12 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
- Code Navigator
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.
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
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 |
---|---|---|---|
ZZZ17916Z | MEDICARE ID-TYPE UNSPECIFIED (04) | CA | |
ZZZ04183Z | MEDICARE PIN (08) | ||
OPL161132 | MEDICARE 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
Administration of psychological or neuropsychological test, first 30 minutes
Evaluation of neuropsychological test, each additional hour
Evaluation of neuropsychological test, first hour
Evaluation of psychological test, each additional hour
Evaluation of psychological test, first hour
Exam of neurobehavioral status, first hour
Psychiatric diagnostic evaluation
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 patientsThis 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 patientsThis 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 patientsAn 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 patientsThis 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 patientsThis 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 patientsAn 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 patientsA 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 patientsPhysician 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.
Reviews for DR. GREGORY IAN FIELDS PHD
There are currently no reviews for this provider. Be the first person to share your experience with this provider by filling out our review form. Your insights are appreciated and will help others make informed decisions.
NPI Validation Check Digit Calculation
The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.
Start with the original NPI number, the last digit is the check digit and is not used in the calculation. | |||||||||
1 | 9 | 0 | 2 | 8 | 5 | 2 | 7 | 8 | 3 |
Step 1: Double the value of the alternate digits, beginning with the rightmost digit. | |||||||||
2 | 9 | 0 | 2 | 16 | 5 | 4 | 7 | 16 | |
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24. | |||||||||
2 + 9 + 0 + 2 + 1 + 6 + 5 + 4 + 7 + 1 + 6 + 24 = 67 | |||||||||
Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit. | |||||||||
70 - 67 = 3 | 3 |
The NPI number 1902852783 is valid because the calculated check digit 3 using the Luhn validation algorithm matches the last digit of the original NPI number.
Other Providers at the Same Location
The following 20 providers are registered at the same or nearby location.
NPI | Name / Type | Taxonomy | Address |
---|---|---|---|
1982686432 | DR. ELEANORE L. WOLPAW M.D. Individual | Internal Medicine | 2825 J ST SUITE 300 SACRAMENTO, CA 95816 (916) 734-7777 |
1518949965 | DR. LINDA JANE WOO M.D. Individual | Internal Medicine | 2825 J ST STE#300 SACRAMENTO, CA 95816 (916) 734-7777 |
1508849084 | DR. MARGARET M. PORTWOOD MD Individual | Physical Medicine & Rehabilitation (Pain Medicine) | 2825 J ST STE. 435 SACRAMENTO, CA 95816 (916) 440-8005 |
1932184108 | LISA YI-MEI HO M.D. Individual | Internal Medicine | 2825 J ST SUITE 300 SACRAMENTO, CA 95816 (916) 734-7777 |
1588649354 | JOHN TAKEO HOSOUME M.D. Individual | Internal Medicine | 2825 J ST SUITE 300 SACRAMENTO, CA 95816 (916) 734-7777 |
1093790743 | DENYSE NISHIO M.D. Individual | Internal Medicine | 2825 J ST SACRAMENTO, CA 95816 (916) 734-7777 |
1609926526 | JENNIFER ELAINE DRAPER M.D. Individual | Internal Medicine | 2825 J ST SUITE #300 SACRAMENTO, CA 95816 (916) 734-7777 |
1669591236 | JILL MARIE STEINBACHER R.N. Individual | Registered Nurse | 2825 J ST STE 400 SACRAMENTO, CA 95816 (916) 734-8036 |
1477741973 | BRIGITTE LEE BERRY M.D. Individual | Internal Medicine | 2825 J ST SUITE 300 SACRAMENTO, CA 95816 (916) 734-7777 |
1417197401 | OBESITY TREATMENT CENTER, A MEDICAL CORPORATION Organization | Internal Medicine (Obesity Medicine) | 2825 J ST SUITE 435 SACRAMENTO, CA 95816 (916) 978-0300 |
1447493630 | TRACY L SMITH RD Individual | Dietitian, Registered | 2825 J ST STE 435 SACRAMENTO, CA 95816 (916) 978-0300 |
1902035181 | STEPHEN IRA STARK, M.D., INC Organization | Specialist | 2825 J ST SUITE 235 SACRAMENTO, CA 95816 (916) 446-3777 |
1093026817 | WENDY ANN CARMICKLE Individual | Physical Therapist | 2825 J ST SUITE 440 SACRAMENTO, CA 95816 (916) 492-2110 |
1386952562 | MELITA N. MOORE,MD INC. Organization | Physical Medicine & Rehabilitation (Sports Medicine) | 2825 J ST SUITE 440 SACRAMENTO, CA 95816 (916) 492-2110 |
1356640783 | WELLFIT, INCORPORATED Organization | Physical Medicine & Rehabilitation (Sports Medicine) | 2825 J ST SUITE 440 SACRAMENTO, CA 95816 (916) 492-2110 |
1659648202 | UNIVERSITY OF CALIFORNIA DAVIS Organization | Clinic/Center (Medical Specialty) | 2825 J ST SUITE 400 SACRAMENTO, CA 95816 (916) 734-4490 |
1720212913 | LISA MARTINE TAMI RD Individual | Dietitian, Registered | 2825 J ST SUITE 435 SACRAMENTO, CA 95816 (916) 978-0300 |
1841540564 | ARLINE S. YEN M.D. Individual | Internal Medicine (Endocrinology, Diabetes & Metabolism) | 2825 J ST SUITE 435 SACRAMENTO, CA 95816 (916) 436-1733 |
1619997897 | LISA S WOODWARD N.P. Individual | Nurse Practitioner (Obstetrics & Gynecology) | 2825 J ST SACRAMENTO, CA 95816 (916) 978-0300 |
1801949144 | MS. JANET LYNNE MOORE MS RD Individual | Dietitian, Registered | 2825 J ST 435 SACRAMENTO, CA 95816 (916) 978-0300 |
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1902852783, enumerated in the NPI registry 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
The provider's speciality is Psychologist with taxonomy code 103TC0700X with a focus in Clinical
The provider has more than 29 years of experience. He graduated from Texas Tech University Health Science Center School Of Medicine in 1997.
The provider might be accepting Accepts: Medicare and Medicaid. Please consult your insurance carrier or call the provider to make sure your health plan is currently accepted.
Yes, as of June 20, 2025 the provider is registered in PECOS and is eligible to order health care services or supplies for Medicare patients. If you are a beneficiary the provider is eligible to order or refer: Part B Clinical Laboratory and Imaging and Durable Medical Equipment (DME).
Medicare beneficiaries should expect a typical cost of $180.85 with an average copayment of $45.21 for new patient appointments. Established patients should expect a typical charge of $105.95 and an average copayment of 26.48. Please review your insurance plan or contact the provider directly to determine your specific costs.
The most common procedures or services performed by this practitioner are: Administration of psychological or neuropsychological test, each additional 30 minutes, Administration of psychological or neuropsychological test, first 30 minutes, Evaluation of neuropsychological test, each additional hour, Evaluation of neuropsychological test, first hour, Evaluation of psychological test, each additional hour, Evaluation of psychological test, first hour, Exam of neurobehavioral status, first hour and Psychiatric diagnostic evaluation.
This NPI record was last updated on May 25, 2006. To officially update your NPI information contact the National Plan and Provider Enumeration System (NPPES) at 1-800-465-3203 (NPI Toll-Free) or by email at [email protected].
NPI Profile data is regularly updated with the latest NPI registry information, if you would like to update or remove your NPI Profile in this website please contact us.