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

John W. Ratzer, CRNA

Certified Registered Nurse Anesthetist in Marietta, OH · enumerated 2006.

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

National Provider Identifier

1588603112

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Registry record

Entity type Individual (Type 1)

Name John W. Ratzer

Credential CRNA

Sex Male

Practice address Marietta, OH, 45750

Phone (740) 568-2000

Fax (740) 568-2089

Enumeration date Jun 6, 2006

Last updated in NPPES Jul 31, 2012

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

Taxonomy & licenses

367500000X Certified Registered Nurse Anesthetist Physician Assistants & Advanced Practice Nursing Providers · License COA.03487.NA (OH) Primary

CRNA · Certified Registered Nurse Anesthetist: An advanced practice nurse specializing in anesthesia care. About the CRNA credential

Other identifiers

Identifier	Type	State	Issuer
000000590690	Other	OH	ANTHEM
000000641591	Other	OH	ANTHEM
P00815809	Other	OH	RRMCR
0787046	Medicaid	OH	-
2604111000	Medicaid	OH	-

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 John Ratzer's NPI record?

Cross-check NPI 1588603112 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1588603112 active?

Yes, as of the latest NPPES snapshot, NPI 1588603112 is active (record last updated 2012-07-31).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-07-31.