Dr. William H Langfield Jr.

Dr. William H Langfield Jr. is a Optometrist provider (Optometrist) practicing in Somerset, MA, registered in the NPPES registry with NPI 1477645521 since 2006.

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI	1477645521
Entity type	Individual (Type 1)
Name	Dr. William H Langfield Jr.
Sex	Male
Practice address	Somerset, MA, 02726
Phone	5086768167
Fax	5086761434
Enumeration date	2006-09-28
Last updated in NPPES	2009-02-20

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	2876	MA

Other identifiers

Identifier	Type	State	Issuer
24380	Other	—	BMC HEALTHNET
W15566	Other	MA	BLUE CROSS MA
15227	Other	MA	HARVARD PILGRIM
79024	Other	—	BLUE CROSS RI
0344214	Medicaid	MA	—
2201002	Other	MA	UNITED HEALTH
400875	Other	—	BLUECHIP

Copy-ready billing details

Provider: William Langfield
NPI: 1477645521
Taxonomy: 152W00000X (Optometrist)
Address: Somerset, MA, 02726

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1922248608	William H Langfield Jr.	Organization	Optometrist	Somerset, MA
1588024525	William H. Langfield Jr Od PC	Organization	Optometrist	Somerset, MA

Verify this record

Cross-check NPI 1477645521 against the authoritative CMS record: view Dr. William H Langfield Jr. 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 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 Langfield?

William Langfield 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.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2009-02-20.