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Compare the published Medicare service mix of Carlos Untal, M.D. with clinicians in the same registry specialty: Emergency Medicine · Interventional Pain Management (CMS).

CA · Exact areaEdit location

2024 published service data · 310 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Shahriar Pirouz, M.D.

Anesthesiology · Interventional Pain Management (CMS) · Pismo Beach, CA

Shared published services
3 shared services · view billing descriptions
  • 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)
  • Testing for presence of drug, by chemistry analyzers (80307)
74%Service-mix similarityView profile →

John Hau, M.D.

Anesthesiology · Pain Management (CMS) · Santa Rosa, CA

Shared published services
3 shared services · view billing descriptions
  • 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)
  • Testing for presence of drug, by chemistry analyzers (80307)
73%Service-mix similarityView profile →

Alan Ho, M.D.

Anesthesiology (CMS) · Fountain Valley, CA

Shared published services
3 shared services · view billing descriptions
  • 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)
  • Testing for presence of drug, by chemistry analyzers (80307)
71%Service-mix similarityView profile →

Michael Ishu Yang, M.D.

Anesthesiology · Interventional Pain Management · Pain Management (CMS) · Santa Rosa, CA

Shared published services
3 shared services · view billing descriptions
  • 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)
  • Testing for presence of drug, by chemistry analyzers (80307)
71%Service-mix similarityView profile →

Armin Farajzadeh Deroee, M.D.

Anesthesiology (CMS) · Visalia, CA

Shared published services
3 shared services · view billing descriptions
  • 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)
  • Testing for presence of drug, by chemistry analyzers (80307)
69%Service-mix similarityView profile →

Aaron Joseph Przybysz, MD

Pain Management (CMS) · Huntington Beach, CA

Shared published services
3 shared services · view billing descriptions
  • 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)
  • Ultrasonic guidance for needle placement (76942)
68%Service-mix similarityView profile →

Gregory Vassilev, MD

Anesthesiology · Pain Management (CMS) · Van Nuys, CA

Shared published services
3 shared services · view billing descriptions
  • 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)
  • Injection of lower or sacral spine facet joint using imaging guidance, single level (64493)
66%Service-mix similarityView profile →

Vinod Nagji Mungalpara, MD

Anesthesiology · Pain Management (CMS) · Bakersfield, CA

Shared published services
3 shared services · view billing descriptions
  • 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)
  • Testing for presence of drug, by chemistry analyzers (80307)
66%Service-mix similarityView profile →

Michael C Yang, MD

Pain Management (CMS) · El Dorado Hills, CA

Shared published services
3 shared services · view billing descriptions
  • 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)
  • Compounded drug, not otherwise classified (J7999)
66%Service-mix similarityView profile →

Robert G Salazar, MD

Anesthesiology · Interventional Pain Management (CMS) · Fresno, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Electronic analysis reprogramming and refill of spinal canal drug infusion pump by physician (62370)
  • Ultrasonic guidance for needle placement (76942)
66%Service-mix similarityView profile →

Matthew Eugene Harris, M.D.

Anesthesiology · Pain Management (CMS) · Laguna Hills, CA

Shared published services
3 shared services · view billing descriptions
  • 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)
  • Injection of substance into lower spine canal using imaging guidance (62323)
65%Service-mix similarityView profile →

Caitlin D Tourje, M.D.

Anesthesiology · Pain Management (CMS) · Camarillo, CA

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Compounded drug, not otherwise classified (J7999)
  • Electronic analysis reprogramming and refill of spinal canal drug infusion pump by physician (62370)
65%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.