Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. William Frederick Watts, O.D.
Optometrist in Newburyport, MA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1841261377
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Registry record
Entity type Individual (Type 1)
Name Dr. William Frederick Watts
Credential O.D.
Sex Male
Practice address 33 Low St, Newburyport, MA, 01950
Phone (978) 462-2020
Fax (978) 462-4263
Enumeration date Feb 1, 2006
Last updated in NPPES Jan 11, 2008
Taxonomy & licenses
152WC0802X Corneal and Contact Management Optometrist Eye and Vision Services Providers · License 2235 (MA) Secondary
152WL0500X Low Vision Rehabilitation Optometrist Eye and Vision Services Providers · License 2235 (MA) Secondary
152WS0006X Sports Vision Optometrist Eye and Vision Services Providers · License 2235 (MA) Secondary
152WX0102X Occupational Vision Optometrist Eye and Vision Services Providers · License 2235 (MA) Secondary
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 0317519 | Medicaid | MA | - |
| 15914 | Other | MA | HARVARD |
| 542065263 | Other | MA | HEALTH CARE VALUE MANAGMT |
| 542065263 | Other | MA | UNITED HEALTH |
| 0023858 | Other | MA | NEIGHBORHOOD HEALTH PLAN |
| 702537 | Other | MA | TUFTS |
| 70010000W15236 | Other | MA | BLUE CROSS & BLUE SHIELD |
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
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.
What specialty is William Watts?
William Watts is registered in NPPES with the primary taxonomy of Optometrist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Chad Mcdonald Optometrist · Newburyport, MA NPI 1215909643 Watts Eye Associates LLC Optometrist · Newburyport, MA NPI 1952426280 Spencer Traxler Optometrist · Newburyport, MA NPI 1700400157 Essex County Orthodontics Pllc Orthodontics and Dentofacial Orthopedics Dentistry · Newburyport, MA NPI 1295310423 Kristin Baragona Optometrist · Newburyport, MA NPI 1114507092
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-01-11.