Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark H Ratner, MD

Urology Physician in Rockville, MD · enumerated 2006.

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

National Provider Identifier

1568544112

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Registry record

Entity type Individual (Type 1)

Name Mark H Ratner

Credential MD

Sex Male

Practice address 9420 Key West Ave, Suite 420, Rockville, MD, 20850

Phone (301) 258-1919

Fax (301) 258-9180

Enumeration date Oct 20, 2006

Last updated in NPPES Sep 28, 2017

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License D0033617 (MD) 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
406091100	Medicaid	MD	-

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 Ratner's NPI record?

Cross-check NPI 1568544112 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1568544112 active?

Yes, as of the latest NPPES snapshot, NPI 1568544112 is active (record last updated 2017-09-28).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-09-28.