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Compare the published Medicare service mix of John Charles Mcduff, M.D. with clinicians in the same registry specialty: Internal Medicine.

FAIRHOPE, AL · Exact areaEdit location

2024 published service data · 20 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Frank Wang

Internal Medicine · Fairhope, AL

Shared published services
3 shared services · view billing descriptions
  • Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Injection of drug or substance under skin or into muscle (96372)
45%Service-mix similarityView profile →

Steven Philip Wittmer, MD

Internal Medicine · Fairhope, AL

Shared published services
3 shared services · view billing descriptions
  • Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Creatinine level to test for kidney function or muscle injury (82570)
44%Service-mix similarityView profile →

Jennifer Sykora, M.D.

Internal Medicine · Fairhope, AL

Shared published services
3 shared services · view billing descriptions
  • Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Injection of drug or substance under skin or into muscle (96372)
44%Service-mix similarityView profile →

Laura Susan Ray, MD

Internal Medicine · Fairhope, AL

Shared published services
1 shared services · view billing descriptions
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)
36%Service-mix similarityView profile →

Richard Lewis Snellgrove, MD

Internal Medicine · Fairhope, AL

Shared published services
3 shared services · view billing descriptions
  • Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month (99490)
  • Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
34%Service-mix similarityView profile →

Suzanne Tormoen, M.D.

Internal Medicine · Fairhope, AL

Shared published services
3 shared services · view billing descriptions
  • Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month (99490)
  • Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
31%Service-mix similarityView profile →

Zachary Kyle Clark, MD

Internal Medicine · Fairhope, AL

Shared published services
3 shared services · view billing descriptions
  • Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Administration of influenza virus vaccine (G0008)
30%Service-mix similarityView profile →

Justine Harris Mckee, DO

Internal Medicine · Fairhope, AL

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Injection of drug or substance under skin or into muscle (96372)
  • X-ray of chest, 2 views (71046)
29%Service-mix similarityView profile →

William Brooks Herron, M.D.

Internal Medicine · Fairhope, AL

Shared published services
3 shared services · view billing descriptions
  • Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and (G0180)
28%Service-mix similarityView profile →

Holly Gluth Pursley, MD

Internal Medicine · Fairhope, AL

Shared published services
1 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
25%Service-mix similarityView profile →
How this comparison works

We use the same calendar year of CMS Medicare Physician & Other Practitioners data for both providers. Published non-drug service counts are combined by HCPCS code across places of service. We apply log(1 + count), normalize the vectors, and compare them using cosine similarity.

Candidates share the reference provider’s current NPPES primary taxonomy and match the location you enter. We examine up to 500 candidates in NPI order, then show up to 12 with the highest positive similarity within that set. The score is not a percentile, medical recommendation, or prediction. Suppressed services are not estimated. Medicare fee-for-service data does not describe a provider’s entire practice.

Source: CMS Medicare Physician & Other Practitioners - by Provider and Service : 2024-12-01 · Published May 21, 2026.