HCPList Know more before you call. About
A DIFFERENT WAY TO EXPLORE

Similar work.
More providers to explore.

Compare the published Medicare service mix of Chiemeka Onyima, M.D. with clinicians in the same registry specialty: Anesthesiology.

WASHINGTON, DC · Exact areaEdit location

2024 published service data · 173 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Malady S Kodgi, M.D

Anesthesiology · Washington, DC

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Injection of substance into lower spine canal using imaging guidance (62323)
57%Service-mix similarityView profile →

Clarence Shannon, MD

Anesthesiology · Washington, DC

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Injection of substance into lower spine canal using imaging guidance (62323)
49%Service-mix similarityView profile →

Adam Greenwood

Anesthesiology · Washington, DC

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
32%Service-mix similarityView profile →

Jevaughn Davis, MD

Anesthesiology · Washington, DC

Shared published services
2 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
23%Service-mix similarityView profile →

Marshall Lawler, M.D.

Anesthesiology · Washington, DC

Shared published services
2 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)
19%Service-mix similarityView profile →

Kaitlyn Gallagher Vest, MD

Anesthesiology · Washington, DC

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
13%Service-mix similarityView profile →

Omar Shairzay, M.D.

Anesthesiology · Washington, DC

Shared published services
2 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
  • Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)
13%Service-mix similarityView profile →

Meredith Anne Gillespie Coppinger, MD

Anesthesiology · Washington, DC

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
13%Service-mix similarityView profile →

Crystal Nicole Adams

Anesthesiology · Washington, DC

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
13%Service-mix similarityView profile →

Orrin Belden, MD

Anesthesiology · Washington, DC

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
12%Service-mix similarityView profile →

Paul L Lion, MD

Anesthesiology · Washington, DC

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
11%Service-mix similarityView profile →

Jason T. Rose, MD

Anesthesiology · Washington, DC

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
10%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.