James Chapman, M.D.
NPI 1073586913 · Internal Medicine Physician · Muskego, WI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Chapman, M.D. is a Internal Medicine Physician provider in Muskego, WI (NPI 1073586913).
Provider details
- NPI number
- 1073586913
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 38828 (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
601 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 337 | $121 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 119 | $122 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 74 | $85 |
| Administration of Influenza Virus VaccineG0008 | 37 | $30 |
| Admn Sarscov2 Vacc 1 Dose90480 | 22 | $41 |
| Administration of Pneumococcal VaccineG0009 | 12 | $30 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 96 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 669 | 205 |
| Amlodipine Besylate | 337 | 110 |
| Lisinopril | 320 | 101 |
| Losartan Potassium | 298 | 95 |
| Pantoprazole Sodium | 254 | 79 |
| Levothyroxine Sodium | 249 | 77 |
| Metoprolol Succinate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-02-10
- Last updated
- 2011-11-03
Frequently asked questions
- What is James Chapman's NPI number?
- James Chapman's National Provider Identifier (NPI) is 1073586913, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Chapman's specialty?
- James Chapman is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is James Chapman located?
- James Chapman's practice location on file with NPPES is S69 W15636 Janesville Road, Muskego, WI 53150-9330.
- What is James Chapman's phone number?
- The practice phone number listed in the NPPES registry for James Chapman is (262) 928-7000.
- Does James Chapman accept Medicare?
- James Chapman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Chapman's NPI active?
- Yes — James Chapman's NPI (1073586913) is active in the NPPES registry as of the last update on 2011-11-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.