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

Dr. Michael John Rosenfeld, M.D.

Neurology Physician in Grinnell, IA · enumerated 2005.

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

National Provider Identifier

1194706218

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Registry record

Entity type Individual (Type 1)

Name Dr. Michael John Rosenfeld

Credential M.D.

Sex Male

Practice address Grinnell, IA, 50112

Phone (641) 236-2905

Fax (641) 236-2907

Enumeration date Nov 7, 2005

Last updated in NPPES Aug 17, 2007

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

Taxonomy & licenses

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 32957 (IA) 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
810623397501120000	Other	IA	TRICARE #
06847	Other	IA	BCBS PROV #
2186049	Medicaid	IA	-
P00120796	Other	IA	RR MEDICARE

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

What specialty is Michael Rosenfeld?

Michael Rosenfeld is registered in NPPES with the primary taxonomy of Neurology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Other providers at this practice address

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Patrick Cogley Family Medicine Physician · Grinnell, IA NPI 1417941717 Roy Doorenbos Family Medicine Physician · Grinnell, IA NPI 1164416467 Guy Mccaw Family Medicine Physician · Grinnell, IA NPI 1588658884 Clayton Francis Family Medicine Physician · Grinnell, IA NPI 1811981012 Daniel Anderson Internal Medicine Physician · Grinnell, IA NPI 1104807692 David Cranston Family Medicine Physician · Grinnell, IA NPI 1376526277 Luke Perrin Family Medicine Physician · Grinnell, IA NPI 1407834740 Grinnell Regional Medical Center General Acute Care Hospital · Grinnell, IA NPI 1669420501

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-08-17.