What is Nicholas Rydzewski's NPI number?

Nicholas Rydzewski's National Provider Identifier (NPI) is 1568855161, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Nicholas Rydzewski's specialty?

Nicholas Rydzewski is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).

Where is Nicholas Rydzewski located?

Nicholas Rydzewski's practice location on file with NPPES is 1000 Mineral Point Ave, Janesville, WI 53548-2982.

What is Nicholas Rydzewski's phone number?

The practice phone number listed in the NPPES registry for Nicholas Rydzewski is (608) 756-6731.

Is Nicholas Rydzewski's NPI active?

Yes — Nicholas Rydzewski's NPI (1568855161) is active in the NPPES registry as of the last update on 2020-09-28.

IndividualActive

Nicholas Rydzewski, MD

NPI 1568855161 · Radiation Oncology Physician · Janesville, WI

Nicholas Rydzewski, MD is a Radiation Oncology Physician provider in Janesville, WI (NPI 1568855161).

Provider details

NPI number: 1568855161
Entity type: Individual
Primary specialty: Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
Credential: MD
Sex: Male
Sole proprietor: Yes
License: 036153609 (IL)

Specialties & taxonomies

Radiation Oncology PhysicianPrimary2085R0001XLicense 72314-20 (WI)
Allopathic & Osteopathic Physicians
Radiation Oncology Physician2085R0001XLicense 036153609 (IL)
Allopathic & Osteopathic Physicians
Student in an Organized Health Care Education/Training Program390200000XLicense R322630745086 (MI)
Student, Health Care

Profile Score

Detailed profile(83/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
11 yrs in NPPES registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
3 documented practice locations

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Practice location

1000 Mineral Point Ave

Janesville, WI 53548-2982

Phone: (608) 756-6731

Fax: (608) 756-6013

Street-level locationGet directions

More WI providers

Mailing address

1000 Mineral Point Ave

Janesville, WI 53548-2982

Additional practice locations (2)

2400 N Rockton Ave
Rockford, IL 61103-3655
Phone: (815) 971-6188
Fax: (815) 968-9677
8201 E Riverside Blvd
Rockford, IL 61114-2300
Phone: (815) 971-7000

Enumerated: 2015-03-06
Last updated: 2020-09-28
Certified: 2020-09-28

Frequently asked questions

What is Nicholas Rydzewski's NPI number?: Nicholas Rydzewski's National Provider Identifier (NPI) is 1568855161, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Nicholas Rydzewski's specialty?: Nicholas Rydzewski is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
Where is Nicholas Rydzewski located?: Nicholas Rydzewski's practice location on file with NPPES is 1000 Mineral Point Ave, Janesville, WI 53548-2982.
What is Nicholas Rydzewski's phone number?: The practice phone number listed in the NPPES registry for Nicholas Rydzewski is (608) 756-6731.
Is Nicholas Rydzewski's NPI active?: Yes — Nicholas Rydzewski's NPI (1568855161) is active in the NPPES registry as of the last update on 2020-09-28.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.