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Compare the published Medicare service mix of Gregory D. Parkhurst, M.D. with clinicians in the same registry specialty: Ophthalmology.

SAN ANTONIO, TX · Exact areaEdit location

2024 published service data · 85 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Matthew Theodore Hirabayashi, MD

Ophthalmology · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Measurement of corneal curvature and depth of eye (92136)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
98%Service-mix similarityView profile →

Kenneth J Maverick, M.D.

Ophthalmology · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Measurement of corneal curvature and depth of eye (92136)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
74%Service-mix similarityView profile →

Joshua Michael Iltis, MD

Ophthalmology · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Measurement of corneal curvature and depth of eye (92136)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
71%Service-mix similarityView profile →

James David Lehmann, MD

Ophthalmology · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Measurement of corneal curvature and depth of eye (92136)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
70%Service-mix similarityView profile →

Nader G Iskander, MD

Ophthalmology · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Measurement of corneal curvature and depth of eye (92136)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
66%Service-mix similarityView profile →

Jason D Burns, M.D.

Ophthalmology · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Measurement of corneal curvature and depth of eye (92136)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
66%Service-mix similarityView profile →

Sharon Kaur Sra, MD

Ophthalmology · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Measurement of corneal curvature and depth of eye (92136)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
60%Service-mix similarityView profile →

Aaron C Hager, MD

Ophthalmology · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Measurement of corneal curvature and depth of eye (92136)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
60%Service-mix similarityView profile →

Ricardo Nathaniel Sepulveda, MD

Ophthalmology · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Measurement of corneal curvature and depth of eye (92136)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
60%Service-mix similarityView profile →

Timothy Peterson Lindquist, MD

Ophthalmology · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Measurement of corneal curvature and depth of eye (92136)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
59%Service-mix similarityView profile →

Lisa Marten

Ophthalmology · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Measurement of corneal curvature and depth of eye (92136)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
59%Service-mix similarityView profile →

Khalil Antonio Harbie, MD

Ophthalmology · San Antonio, TX

Shared published services
3 shared services · view billing descriptions
  • Removal of cataract with insertion of prosthetic lens (66984)
  • Measurement of corneal curvature and depth of eye (92136)
  • New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)
58%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.