Eric Grigsby, M.D.
NPI 1952328494 · Pain Medicine Physician · Napa, CA
Enrolled with Medicare as Practitioner - Pain Management · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Eric Grigsby, M.D. is a Pain Medicine Physician provider in Napa, CA (NPI 1952328494).
Provider details
- NPI number
- 1952328494
- Entity type
- Individual
- Primary specialty
- Pain Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G648480 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
333 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 98 | $146 |
| Testing for Presence of Drug, By Chemistry Analyzers80307 | 85 | $61 |
| Drug Test(s), Definitive, Utilizing (1) Drug Identification Methods Able to Identify Individual Drugs and Distinguish Between Structural Isomers (but Not Necessarily Stereoisomers), Including, But Not Limited to Gc/Ms (any Type, Single Or Tandem) and Lc/MsG0483 | 85 | $242 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 36 | $188 |
| Aspiration of Cerebrospinal Fluid and Injection in Shunt Tubing Or Reservoir61070 | 16 | $55 |
| Review By Radiologist of Previous Placed Shunt Image |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$314 across 6 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-17
- Last updated
- 2011-09-21
Frequently asked questions
- What is Eric Grigsby's NPI number?
- Eric Grigsby's National Provider Identifier (NPI) is 1952328494, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Eric Grigsby's specialty?
- Eric Grigsby is listed in the NPPES registry with a primary specialty of Pain Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Eric Grigsby located?
- Eric Grigsby's practice location on file with NPPES is 3434 Villa Ln, Napa, CA 94558-6405.
- What is Eric Grigsby's phone number?
- The practice phone number listed in the NPPES registry for Eric Grigsby is (707) 252-9666.
- Does Eric Grigsby accept Medicare?
- Eric Grigsby is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Eric Grigsby's NPI active?
- Yes — Eric Grigsby's NPI (1952328494) is active in the NPPES registry as of the last update on 2011-09-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.