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Compare the published Medicare service mix of Laya Nasrollah with clinicians in the same registry specialty: Gastroenterology · Internal Medicine (CMS).

CAMARILLO, CA · 10 milesEdit location
Within 10 miles · Approximate ZIP-area distance

Approximate straight-line distances between ZIP-area centers; a city search starts from the average of its ZIP centers. Uses the primary reported practice ZIP, not an exact office address or driving distance. Records without matched coordinates are excluded. How distance works

2024 published service data · 9 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Karen Simon, M.D.

Gastroenterology (CMS) · Oxnard, CA

Shared published services
3 shared services · view billing descriptions
  • Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month (99439)
  • Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)
  • Management using the results of remote vital sign monitoring per calendar month, first 20 minutes (99457)
78%Service-mix similarity~8.7 milesView profile →

Justin M Marasigan, DO

Gastroenterology (CMS) · Oxnard, CA

Shared published services
3 shared services · view billing descriptions
  • Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month (99439)
  • Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
70%Service-mix similarity~8.7 milesView profile →

Keval Dipak Shah, D.O.

Gastroenterology · Internal Medicine (CMS) · Oxnard, CA

Shared published services
3 shared services · view billing descriptions
  • Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month (99439)
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
65%Service-mix similarity~8.7 milesView profile →

Donald Miller, MD

Gastroenterology (CMS) · Oxnard, CA

Shared published services
3 shared services · view billing descriptions
  • Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month (99439)
  • Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)
  • Management using the results of remote vital sign monitoring per calendar month, first 20 minutes (99457)
61%Service-mix similarity~8.7 milesView profile →

Kumar Subodh Desai, M.D.

Gastroenterology (CMS) · Thousand Oaks, CA

Shared published services
3 shared services · view billing descriptions
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
56%Service-mix similarity~8.6 milesView profile →

Mohammad Naeemullah Khan, M.D.

Gastroenterology · Internal Medicine (CMS) · Oxnard, CA

Shared published services
3 shared services · view billing descriptions
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
50%Service-mix similarity~8.7 milesView profile →

Shahram Daneshgar, MD

Gastroenterology (CMS) · Thousand Oaks, CA

Shared published services
3 shared services · view billing descriptions
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
  • Biopsy of large bowel using a flexible endoscope (45380)
43%Service-mix similarity~8.6 milesView profile →

Gilbert Simoni, M.D., FACG

Gastroenterology (CMS) · Thousand Oaks, CA

Shared published services
3 shared services · view billing descriptions
  • New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)
  • Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
43%Service-mix similarity~8.6 milesView profile →

Steven A Kind, MD

Internal Medicine (CMS) · Thousand Oaks, CA

Shared published services
3 shared services · view billing descriptions
  • Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)
  • Biopsy of large bowel using a flexible endoscope (45380)
  • Diagnostic exam of large bowel using a flexible endoscope (45378)
22%Service-mix similarity~8.6 milesView 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 approximate distance 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.