Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ronald J. Mattson, M.D.

Surgery Physician in Bryn Mawr, PA · enumerated 2006.

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

National Provider Identifier

1851351910

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Registry record

Entity type Individual (Type 1)

Name Ronald J. Mattson

Credential M.D.

Sex Male

Practice address 830 Old Lancaster Rd., Suite 306, Bryn Mawr, PA, 19010

Phone (610) 527-1185

Fax (610) 527-1940

Enumeration date Mar 24, 2006

Last updated in NPPES Feb 1, 2011

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License MD013533E (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
1013332660002	Medicaid	PA	-
0006386640003	Medicaid	PA	-

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 Ronald Mattson's NPI record?

Cross-check NPI 1851351910 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1851351910 active?

Yes, as of the latest NPPES snapshot, NPI 1851351910 is active (record last updated 2011-02-01).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-02-01.