Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. William Moser Prentiss, O.D.

Optometrist in Danvers, MA · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1700979978

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. William Moser Prentiss

Credential O.D.

Sex Male

Practice address Danvers, MA, 01923

Phone (978) 774-7033

Fax (978) 774-0341

Enumeration date Oct 2, 2006

Last updated in NPPES Feb 27, 2008

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 3725 (MA) Primary

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
0392316	Medicaid	MA	-
755413	Other	MA	TUFTS
3330581	Other	MA	AETNA
9787747033	Other	MA	VISION SERVICE PLAN
VC6000251585AD001	Other	MA	MASS REHAB COMMISSION
151089	Other	MA	HARVARD PILGRM
0035493	Other	MA	NEIGHBORHOOD HEALTH PLAN
W15990	Other	MA	BLUE CROSS BLUE SHIELD
42852	Other	MA	DAVIS VISION
59234	Other	MA	FALLON

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 → Validate an NPI →

Frequently asked questions

What is the NPI number for William Prentiss?

The National Provider Identifier (NPI) for William Prentiss is 1700979978, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Prentiss practice?

The practice location on file with NPPES is in Danvers, MA. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-02-27.