NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Michael J Larock, MD

Hospitalist Physician in Bryn Mawr, PA · enumerated 2006.

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

National Provider Identifier

1639138829

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Michael J Larock
Credential MD
Sex Male
Practice address 130 S Bryn Mawr Ave Ste H321, Bryn Mawr, PA, 19010
Phone (484) 337-4097
Fax (484) 337-4082
Enumeration date Mar 17, 2006
Last updated in NPPES Jun 18, 2024

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD051324L (PA) Secondary
208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License MD051324L (PA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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 1639138829 active?
Yes, as of the latest NPPES snapshot, NPI 1639138829 is active (record last updated 2024-06-18).
How do I verify Michael Larock's NPI record?
Cross-check NPI 1639138829 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 2024-06-18.