John Maul, MD
NPI 1326014382 · Hematology & Oncology Physician · Grafton, WI
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Maul, MD is a Hematology & Oncology Physician provider in Grafton, WI (NPI 1326014382).
Provider details
- NPI number
- 1326014382
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 48107 (WI)
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
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
1,830 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) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 821 | $15 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 510 | $90 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 332 | $133 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 70 | $61 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 42 | $61 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 35 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 370 | 91 |
| Letrozole | 201 | 52 |
| Exemestane | 108 | 27 |
| Acyclovir | 93 | 17 |
| Tamoxifen Citrate | 91 | 27 |
| Imatinib Mesylate | 68 | — |
| Apixabanbrand: Eliquis | 66 | 11 |
| Dexamethasone | 62 | 20 |
Practice location
Mailing address
Additional practice locations (1)
- 1355 Mariners DrWarsaw, IN 46582-7145Phone: (260) 266-7100Fax: (260) 266-7885
Registry dates
- Enumerated
- 2006-02-28
- Last updated
- 2025-02-03
- Certified
- 2025-02-03
Frequently asked questions
- What is John Maul's NPI number?
- John Maul's National Provider Identifier (NPI) is 1326014382, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Maul's specialty?
- John Maul is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is John Maul located?
- John Maul's practice location on file with NPPES is 975 Port Washington Rd, Grafton, WI 53024-9201.
- What is John Maul's phone number?
- The practice phone number listed in the NPPES registry for John Maul is (262) 857-5750.
- Does John Maul accept Medicare?
- John Maul is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Maul's NPI active?
- Yes — John Maul's NPI (1326014382) is active in the NPPES registry as of the last update on 2025-02-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.