William Heifner, MD
NPI 1285693325 · Family Medicine Physician · Madison, WI
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Heifner, MD is a Family Medicine Physician provider in Madison, WI (NPI 1285693325).
Provider details
- NPI number
- 1285693325
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 27655 (WI)
Specialties & taxonomies
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
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
56 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 33 | $83 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 12 | $120 |
| Manual Urinalysis Test With Examination Using Microscope, Automated81001 | 11 | $3 |
Typical Medicare-allowed amounts for these services range $3–$120 (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
Registry dates
- Enumerated
- 2006-03-18
- Last updated
- 2023-06-02
- Certified
- 2023-06-02
Frequently asked questions
- What is William Heifner's NPI number?
- William Heifner's National Provider Identifier (NPI) is 1285693325, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Heifner's specialty?
- William Heifner is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Heifner located?
- William Heifner's practice location on file with NPPES is 2402 Winnebago St, Madison, WI 53704-5341.
- What is William Heifner's phone number?
- The practice phone number listed in the NPPES registry for William Heifner is (608) 242-6855.
- Does William Heifner accept Medicare?
- William Heifner is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Heifner's NPI active?
- Yes — William Heifner's NPI (1285693325) is active in the NPPES registry as of the last update on 2023-06-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.