William Hartman, M.D.
NPI 1659345080 · Anesthesiology Physician · Eau Claire, WI
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Hartman, M.D. is a Anesthesiology Physician provider in Eau Claire, WI (NPI 1659345080).
Provider details
- NPI number
- 1659345080
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 46750 (MN)
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 tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
116 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 48 | $74 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 43 | $90 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 25 | $123 |
Typical Medicare-allowed amounts for these services range $74–$123 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (2)
- 200 1st St SwRochester, MN 55905-0001Phone: (507) 284-2511
- 3096 Edenberry StFitchburg, WI 53711-7201Phone: (507) 254-1478
Registry dates
- Enumerated
- 2006-02-14
- Last updated
- 2026-05-18
- Certified
- 2026-05-18
Frequently asked questions
- What is William Hartman's NPI number?
- William Hartman's National Provider Identifier (NPI) is 1659345080, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Hartman's specialty?
- William Hartman is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is William Hartman located?
- William Hartman's practice location on file with NPPES is 1400 Bellinger Street, Eau Claire, WI 54703-5222.
- What is William Hartman's phone number?
- The practice phone number listed in the NPPES registry for William Hartman is (715) 838-5222.
- Does William Hartman accept Medicare?
- William Hartman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Hartman's NPI active?
- Yes — William Hartman's NPI (1659345080) is active in the NPPES registry as of the last update on 2026-05-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.