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Compare the published Medicare service mix of David Christopher Greczek, PA-C with clinicians in the same registry specialty: Physician Assistant.

BROOKLYN, NY · Exact areaEdit location

2024 published service data · 300 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Wanipa Muwowo, PA

Physician Assistant · Brooklyn, NY

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 assessment of bladder emptying (51741)
  • Ultrasound measurement of bladder capacity after voiding (51798)
65%Service-mix similarityView profile →

Olivia Kyi, PHYSICIAN ASSISTANT

Physician Assistant · Brooklyn, NY

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)
  • Insertion of needle into vein for collection of blood sample (36415)
  • Non-needle measurement and recording of electrical activity of muscles at bladder and bowel openings (51784)
59%Service-mix similarityView profile →

Shirley Zeng, PA

Physician Assistant · Brooklyn, NY

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 assessment of bladder emptying (51741)
  • Insertion of needle into vein for collection of blood sample (36415)
55%Service-mix similarityView profile →

Alice Hong, PA

Physician Assistant · Brooklyn, NY

Shared published services
2 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)
  • Telephone medical discussion with physician, 11-20 minutes (99442)
51%Service-mix similarityView profile →

Gloria Chu-Qing Liang, PA-C

Physician Assistant · Brooklyn, NY

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)
  • Telephone medical discussion with physician, 11-20 minutes (99442)
  • Insertion of needle into vein for collection of blood sample (36415)
51%Service-mix similarityView profile →

Ellen Zhuravsky, R-PAC

Physician Assistant · Brooklyn, NY

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)
  • Telephone medical discussion with physician, 11-20 minutes (99442)
  • Insertion of needle into vein for collection of blood sample (36415)
50%Service-mix similarityView profile →

Anzhelika Briskin, PA

Physician Assistant · Brooklyn, NY

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)
  • Telephone medical discussion with physician, 11-20 minutes (99442)
  • Insertion of needle into vein for collection of blood sample (36415)
50%Service-mix similarityView profile →

Dana Rutyna, P.A.

Physician Assistant · Brooklyn, NY

Shared published services
3 shared services · view billing descriptions
  • Urinalysis, manual test (81002)
  • Ultrasound measurement of bladder capacity after voiding (51798)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
47%Service-mix similarityView profile →

Allyson Ross

Physician Assistant · Brooklyn, NY

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)
  • Urinalysis, manual test (81002)
  • Insertion of needle into vein for collection of blood sample (36415)
47%Service-mix similarityView profile →

Melissa Velez, RPA-C

Physician Assistant · Brooklyn, NY

Shared published services
2 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)
  • 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)
45%Service-mix similarityView profile →

Louis Kiwala, PA-C, AP,L.AC.,DNBAO

Physician Assistant · Brooklyn, NY

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)
  • Insertion of needle into vein for collection of blood sample (36415)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
44%Service-mix similarityView profile →

Jane Rupp, PA-C

Physician Assistant · Brooklyn, NY

Shared published services
2 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)
44%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.