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

Mr. Mark Edward Holterhoff, M.A., P.T.

Physical Therapist in Wayne, NJ · enumerated 2006.

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

National Provider Identifier

1427123322

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Registry record

Entity type Individual (Type 1)

Name Mr. Mark Edward Holterhoff

Credential M.A., P.T.

Sex Male

Practice address Wayne, NJ, 07470

Phone (973) 835-2827

Fax (973) 835-1856

Enumeration date Nov 24, 2006

Last updated in NPPES Jul 8, 2007

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

Taxonomy & licenses

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 40QA00135400 (NJ) Primary

PT · Physical Therapist: A licensed movement specialist treating injury and disability through exercise and rehabilitation. About the PT credential

Other identifiers

Identifier	Type	State	Issuer
P415537	Other	NJ	0XFORD
3K4272	Other	NJ	HEALTHNET

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

How do I verify Mark Holterhoff's NPI record?

Cross-check NPI 1427123322 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1427123322 active?

Yes, as of the latest NPPES snapshot, NPI 1427123322 is active (record last updated 2007-07-08).

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Leslie Gilbert Clinical Psychologist · Wayne, NJ NPI 1043209539 Kenneth Lubansky Pulmonary Disease Physician · Wayne, NJ NPI 1699749937 Richard Berkowitz Endocrinology, Diabetes & Metabolism Physician · Wayne, NJ NPI 1104832492 Ruth Mollod Psychologist · Wayne, NJ NPI 1649360207 David Safar Neurology Physician · Wayne, NJ NPI 1548344195 Deanna Macek Ophthalmology Physician · Wayne, NJ NPI 1508938010 Michael Marolla Physical Therapist · Wayne, NJ NPI 1326114273 Physical Therapy Associates of Wayne, Inc. Physical Therapy Clinic/Center · Wayne, NJ NPI 1992870802

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.