Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Clinton Frederick Miller, M.D.

Specialist in Portsmouth, NH · enumerated 2006.

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

National Provider Identifier

1699721761

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Registry record

Entity type Individual (Type 1)

Name Dr. Clinton Frederick Miller

Credential M.D.

Sex Male

Practice address 330 Borthwick Ave, Suite 300, Portsmouth, NH, 03801

Phone (603) 433-4666

Fax (603) 433-1338

Enumeration date May 26, 2006

Last updated in NPPES Jul 2, 2013

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 7453 (NH) 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
80009452	Medicaid	NH	-
3082955	Medicaid	NH	-

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

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 Clinton Miller?

Clinton Miller is registered in NPPES with the primary taxonomy of Specialist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-07-02.