NPI Portal NPI Lookup & Verification

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

Dr. Jeff Marshick, D.O.

Pulmonary Disease Physician in Clarkston, MI · enumerated 2007 · practices at Pulmonary & Critical Care Medicine Consultants PC.

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

National Provider Identifier

1811013865

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Jeff Marshick
Credential D.O.
Sex Male
Practice address Clarkston, MI, 48346
Phone (248) 922-9283
Fax (248) 922-9286
Enumeration date Mar 21, 2007
Last updated in NPPES Feb 5, 2020

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

Taxonomy & licenses

207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians · License 5101015601 (MI) Primary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

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

Is NPI 1811013865 active?
Yes, as of the latest NPPES snapshot, NPI 1811013865 is active (record last updated 2020-02-05).
How do I verify Jeff Marshick's NPI record?
Cross-check NPI 1811013865 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-02-05.