Dr. Jack Grey Hall, O.D.
Dr. Jack Grey Hall is a Optometrist provider (Optometrist) practicing in Modesto, CA, registered in the NPPES registry with NPI 1639228331 since 2007. The credential OD stands for Doctor of Optometry.
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1639228331 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Jack Grey Hall |
| Credential | O.D. |
| Sex | Male |
| Practice address | Modesto, CA, 95356 |
| Phone | 2095430220 |
| Fax | 2095430220 |
| Enumeration date | 2007-01-10 |
| Last updated in NPPES | 2007-07-08 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 152W00000X | Optometrist | Primary | 6455T | CA |
OD — Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential
Copy-ready billing details
Provider: Jack Hall, O.D. NPI: 1639228331 Taxonomy: 152W00000X (Optometrist) Address: Modesto, CA, 95356
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1477663086 | Costco Wholesale Corporation | Organization | Community/Retail Pharmacy | Modesto, CA |
| 1669774741 | Jacob Schnaidt | Individual | Pharmacist | Modesto, CA |
| 1598054801 | Frank Carone | Individual | Pharmacist | Modesto, CA |
| 1023431194 | Ashley Avila | Individual | Pharmacist | Modesto, CA |
| 1104219336 | Costco Wholesale Corporation | Organization | Hearing Aid Equipment | Modesto, CA |
| 1962145789 | Anthony Christian Tan | Individual | Pharmacist | Modesto, CA |
Verify this record
Cross-check NPI 1639228331 against the authoritative CMS record: view Dr. Jack Grey Hall on the official NPPES registry .
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. Read the full guide or validate an NPI number.
Frequently asked questions
Is NPI 1639228331 active?
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-08.