Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Eric J Grigsby, M.D.
Pain Medicine Physician in Napa, CA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1952328494
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Registry record
Entity type Individual (Type 1)
Name Dr. Eric J Grigsby
Credential M.D.
Sex Male
Practice address 3434 Villa Ln, Suite 150, Napa, CA, 94558
Phone (707) 252-9666
Fax (707) 258-2780
Enumeration date Jul 17, 2006
Last updated in NPPES Sep 21, 2011
Taxonomy & licenses
208VP0000X Pain Medicine Physician Allopathic & Osteopathic Physicians · License G648480 (CA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 00G648480 | Medicaid | CA | - |
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
What specialty is Eric Grigsby?
Eric Grigsby is registered in NPPES with the primary taxonomy of Pain Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
Other providers at this practice address
Browse all → Robert Dunham Surgery Physician · Napa, CA NPI 1700851870 Gail Mcglothlen Clinical Nurse Specialist · Napa, CA NPI 1679598551 Spectrumcare Rehabilitation Medical Center Pain Medicine Physician · Napa, CA NPI 1477578201 Thomas C Johnson Dmd, Inc Apc General Practice Dentistry · Napa, CA NPI 1386733228 Thomas Johnson General Practice Dentistry · Napa, CA NPI 1750470688 Do-Eun Lee Endocrinology, Diabetes & Metabolism Physician · Napa, CA NPI 1346339652 John Armstrong Gynecology Physician · Napa, CA NPI 1790875995 Joseph Reid Family Medicine Physician · Napa, CA NPI 1518032655
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-09-21.