Peter Marks, M.D.
NPI 1558327320 · Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Beloit, WI
Enrolled with Medicare as Practitioner - Vascular Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Peter Marks, M.D. is a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician provider in Beloit, WI (NPI 1558327320).
Provider details
- NPI number
- 1558327320
- Entity type
- Individual
- Primary specialty
- Thoracic Surgery (Cardiothoracic Vascular Surgery) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 45518-20 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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
Mailing address
Registry dates
- Enumerated
- 2006-04-21
- Last updated
- 2013-02-27
Frequently asked questions
- What is Peter Marks's NPI number?
- Peter Marks's National Provider Identifier (NPI) is 1558327320, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peter Marks's specialty?
- Peter Marks is listed in the NPPES registry with a primary specialty of Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (Allopathic & Osteopathic Physicians).
- Where is Peter Marks located?
- Peter Marks's practice location on file with NPPES is 1969 W. Hart Road, Beloit, WI 53511-2298.
- What is Peter Marks's phone number?
- The practice phone number listed in the NPPES registry for Peter Marks is (608) 364-5011.
- Does Peter Marks accept Medicare?
- Peter Marks is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Peter Marks's NPI active?
- Yes — Peter Marks's NPI (1558327320) is active in the NPPES registry as of the last update on 2013-02-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.