Jan Herholdt, MD
NPI 1558449538 · Anesthesiology Physician · Madison, WI
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jan Herholdt, MD is a Anesthesiology Physician provider in Madison, WI (NPI 1558449538).
Provider details
- NPI number
- 1558449538
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- V6183 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 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
Mailing address
Additional practice locations (1)
- 200 Abraham Flexner WayLouisville, KY 40202-2877Phone: (502) 852-5851
Registry dates
- Enumerated
- 2006-11-01
- Last updated
- 2025-12-08
- Certified
- 2025-12-08
Frequently asked questions
- What is Jan Herholdt's NPI number?
- Jan Herholdt's National Provider Identifier (NPI) is 1558449538, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jan Herholdt's specialty?
- Jan Herholdt is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Jan Herholdt located?
- Jan Herholdt's practice location on file with NPPES is 600 Highland Ave, Madison, WI 53792-4294.
- What is Jan Herholdt's phone number?
- The practice phone number listed in the NPPES registry for Jan Herholdt is (608) 263-8100.
- Does Jan Herholdt accept Medicare?
- Jan Herholdt is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jan Herholdt's NPI active?
- Yes — Jan Herholdt's NPI (1558449538) is active in the NPPES registry as of the last update on 2025-12-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.