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Compare the published Medicare service mix of Nathan Anicas Walker, M.D. with clinicians in the same registry specialty: Neurology (CMS).

NC · Exact areaEdit location

2024 published service data · 14 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Daniel Thomas Garber, M.D.

Neurology (CMS) · Concord, NC

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Sleep study in sleep lab with continuous airway pressure (6 years or older) (95811)
  • Sleep study in sleep lab (6 years or older) (95810)
77%Service-mix similarityView profile →

Marjorie Ellen Soltis, MD

Neurology (CMS) · Durham, NC

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Sleep study in sleep lab with continuous airway pressure (6 years or older) (95811)
  • Sleep study in sleep lab (6 years or older) (95810)
69%Service-mix similarityView profile →

John Thomas Chewning, M.D.

Neurology · Sleep Medicine (CMS) · Winston Salem, NC

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Sleep study in sleep lab with continuous airway pressure (6 years or older) (95811)
  • Sleep study in sleep lab (6 years or older) (95810)
66%Service-mix similarityView profile →

Ehrlich Cu Tan, MD

Neurology · Sleep Medicine (CMS) · Charlotte, NC

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Sleep study in sleep lab with continuous airway pressure (6 years or older) (95811)
  • Sleep study in sleep lab (6 years or older) (95810)
65%Service-mix similarityView profile →

Meredith Spencer Snapp, M.D.

Neurology · Sleep Medicine (CMS) · Charlotte, NC

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Sleep study in sleep lab with continuous airway pressure (6 years or older) (95811)
  • Sleep study in sleep lab (6 years or older) (95810)
64%Service-mix similarityView profile →

Mark Letica, MD

Neurology · Sleep Medicine (CMS) · Concord, NC

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Sleep study in sleep lab with continuous airway pressure (6 years or older) (95811)
  • Sleep study in sleep lab (6 years or older) (95810)
63%Service-mix similarityView profile →

Douglas B Kirsch, MD

Neurology · Sleep Medicine (CMS) · Charlotte, NC

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Sleep study in sleep lab with continuous airway pressure (6 years or older) (95811)
  • Sleep study in sleep lab (6 years or older) (95810)
61%Service-mix similarityView profile →

Rupendra Nath Ghatak

Sleep Medicine (CMS) · Charlotte, NC

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Sleep study in sleep lab with continuous airway pressure (6 years or older) (95811)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
55%Service-mix similarityView profile →

Dittana Phoncharoensri, M.D.

Neurology (CMS) · Bermuda Run, NC

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Sleep study in sleep lab (6 years or older) (95810)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
54%Service-mix similarityView profile →

Kimberly Nicole Mims, MD

Neurology · Sleep Medicine (CMS) · Charlotte, NC

Shared published services
3 shared services · view billing descriptions
  • Sleep study in sleep lab (6 years or older) (95810)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
50%Service-mix similarityView profile →

Sushrusha Arjyal, MD

Specialty details in registry · Morrisville, NC

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
48%Service-mix similarityView profile →

William Eric Clemons, MD

Psychiatry · Sleep Medicine (CMS) · Charlotte, NC

Shared published services
3 shared services · view billing descriptions
  • Sleep study in sleep lab with continuous airway pressure (6 years or older) (95811)
  • Sleep study in sleep lab (6 years or older) (95810)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
46%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.