Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Ronald H. Witkin, MD

Q: What type of organization is Ronald H. Witkin, MD?

Ronald H. Witkin, MD is registered in NPPES as a Internal Medicine Physician (its primary provider taxonomy).

Internal Medicine Physician in Laconia, NH · enumerated 2007 · authorized official Catherine Foster, Business Manager.

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

National Provider Identifier

1396947172

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Registry record

Entity type Organization (Type 2)

Legal business name Ronald H. Witkin, MD

Practice address 85 Spring St, Suite 404, Laconia, NH, 03246

Phone (603) 524-9201

Fax (603) 524-4338

Enumeration date Jun 4, 2007

Last updated in NPPES Jun 21, 2011

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Catherine Foster

Title Business Manager

Phone (603) 524-9201

Other identifiers

Identifier	Type	State	Issuer
30212776	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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

What type of organization is Ronald H. Witkin, MD?

Ronald H. Witkin, MD is registered in NPPES as a Internal Medicine Physician (its primary provider taxonomy).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-06-21.