Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Rena Beth Zimmerman, M.D.

Radiation Oncology Physician in Mchenry, IL · enumerated 2006.

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

National Provider Identifier

1851350318

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Registry record

Entity type Individual (Type 1)

Name Dr. Rena Beth Zimmerman

Credential M.D.

Sex Female

Practice address 4305 W Medical Center Dr, Mchenry, IL, 60050

Phone (815) 344-8000

Fax (815) 759-4075

Enumeration date Mar 22, 2006

Last updated in NPPES Sep 24, 2025

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 35053193Z (OH) Secondary

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License PT20525 (ND) Secondary

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 036071196 (IL) 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
G8889434	Other	-	MEDICARE
0671849	Medicaid	OH	-
P000813208	Other	-	MEDICARE RAILROAD

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

What is the NPI number for Rena Zimmerman?

The National Provider Identifier (NPI) for Rena Zimmerman is 1851350318, a Type 1 (individual) record in the CMS NPPES registry.

Where does Rena Zimmerman practice?

The practice location on file with NPPES is in Mchenry, IL. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Terrence Bugno Radiation Oncology Physician · Mchenry, IL NPI 1235163437 Illinois Cancer Specialists Hematology & Oncology Physician · Mchenry, IL NPI 1922114453 Tina Han Genetic Counselor (M.S.) · Mchenry, IL NPI 1508394735 Jill Benedeck Oncology Clinical Nurse Specialist · Mchenry, IL NPI 1245742949 Shunqing Zhang Radiation Oncology Physician · Mchenry, IL NPI 1649773425 Integrative Radiation Oncology Consultants Radiation Oncology Physician · Mchenry, IL NPI 1659857878 Lora Anderson Oncology Nutrition Registered Dietitian · Mchenry, IL NPI 1982285672

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-24.