Gregory Fields, PHD
NPI 1902852783 · Clinical Psychologist · Sacramento, CA
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Fields, PHD is a Clinical Psychologist provider in Sacramento, CA (NPI 1902852783).
Provider details
- NPI number
- 1902852783
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Male
- Sole proprietor
- No
- License
- PSY16113 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
532 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Administration of Psychological Or Neuropsychological Test, Each Additional 30 Minutes96137 | 226 | $41 |
| Evaluation of Neuropsychological Test, Each Additional Hour96133 | 171 | $101 |
| Evaluation of Neuropsychological Test, First Hour96132 | 58 | $133 |
| Administration of Psychological Or Neuropsychological Test, First 30 Minutes96136 | 40 | $45 |
| Exam of Neurobehavioral Status, First Hour96116 | 37 | $95 |
Typical Medicare-allowed amounts for these services range $41–$133 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-25
- Last updated
- 2013-08-12
Frequently asked questions
- What is Gregory Fields's NPI number?
- Gregory Fields's National Provider Identifier (NPI) is 1902852783, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Fields's specialty?
- Gregory Fields is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Gregory Fields located?
- Gregory Fields's practice location on file with NPPES is 2825 J St, Sacramento, CA 95816-4300.
- What is Gregory Fields's phone number?
- The practice phone number listed in the NPPES registry for Gregory Fields is (916) 425-3177.
- Does Gregory Fields accept Medicare?
- Gregory Fields is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Fields's NPI active?
- Yes — Gregory Fields's NPI (1902852783) is active in the NPPES registry as of the last update on 2013-08-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.