Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William J. Waterhouse, MD

Ophthalmology Physician in Grand Jct, CO · enumerated 2005.

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

National Provider Identifier

1275536138

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Registry record

Entity type Individual (Type 1)

Name Dr. William J. Waterhouse

Credential MD

Sex Male

Practice address 2478 Patterson Rd, # 7, Grand Jct, CO, 81505

Phone (970) 255-7065

Fax (970) 255-7076

Enumeration date May 24, 2005

Last updated in NPPES Sep 18, 2013

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 33513 (CO) 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
WA93841	Other	CO	BCBS
841413590000	Other	CO	ROCKY MTN HEALTH CARE OTN
01335132	Medicaid	CO	-

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.

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Frequently asked questions

What is the NPI number for William Waterhouse?

The National Provider Identifier (NPI) for William Waterhouse is 1275536138, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Waterhouse practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-09-18.