Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark A Lopatin, M.D.

Rheumatology Physician in Willow Grove, PA · enumerated 2005.

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

National Provider Identifier

1407852379

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark A Lopatin

Credential M.D.

Sex Male

Practice address 2360 Maryland Rd, Willow Grove, PA, 19090

Phone (215) 657-6776

Fax (267) 913-5961

Enumeration date Jun 24, 2005

Last updated in NPPES Nov 27, 2023

Taxonomy & licenses

207RR0500X Rheumatology Physician Allopathic & Osteopathic Physicians · License MD032614E (PA) 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
0054052000	Other	PA	KEYSTONE
660001149	Other	PA	UNITED HEALTH CARE
1068970002	Other	PA	CIGNA
98762	Other	PA	AETNA

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 1407852379 active?

Yes, as of the latest NPPES snapshot, NPI 1407852379 is active (record last updated 2023-11-27).

How do I verify Mark Lopatin's NPI record?

Cross-check NPI 1407852379 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-11-27.