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Compare the published Medicare service mix of Christopher J Ronkar, MD with clinicians in the same registry specialty: Rheumatology (CMS).

URBANDALE, IA · Exact areaEdit location

2024 published service data · 12 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Erik D. Swenson, MD

Rheumatology (CMS) · Urbandale, IA

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Blood creatinine level (82565)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
95%Service-mix similarityView profile →

Gino Paul Chesini, DO

Internal Medicine · Rheumatology (CMS) · Urbandale, IA

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Blood creatinine level (82565)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
94%Service-mix similarityView profile →

Steven Michael Craig, M.D.

Internal Medicine · Rheumatology (CMS) · Urbandale, IA

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Blood creatinine level (82565)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
92%Service-mix similarityView profile →

Cory B Pittman, MD

Internal Medicine · Rheumatology (CMS) · Urbandale, IA

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Blood creatinine level (82565)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
92%Service-mix similarityView profile →

Susan Jacobi, MD

Rheumatology (CMS) · Urbandale, IA

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Blood creatinine level (82565)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
92%Service-mix similarityView profile →

Thomas William Schmidt, MD

Rheumatology (CMS) · Urbandale, IA

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Blood creatinine level (82565)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
91%Service-mix similarityView profile →

Mark Burdt, DO

Rheumatology (CMS) · Urbandale, IA

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Blood creatinine level (82565)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
90%Service-mix similarityView profile →

Stephen James Slade, MD

Internal Medicine · Rheumatology (CMS) · Urbandale, IA

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Blood creatinine level (82565)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
90%Service-mix similarityView profile →

Deana Dawn Hoganson, M.D.

Rheumatology (CMS) · Urbandale, IA

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Blood creatinine level (82565)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
89%Service-mix similarityView profile →

Kristin L Harts, MD

Rheumatology (CMS) · Urbandale, IA

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Blood creatinine level (82565)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
87%Service-mix similarityView profile →

Joseph O Gilg, MD

Rheumatology (CMS) · Urbandale, IA

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Blood creatinine level (82565)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
86%Service-mix similarityView profile →

Jacob Gregory Murray, DO

Rheumatology (CMS) · Urbandale, IA

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Blood creatinine level (82565)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
56%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.