Why are Medicare and Medicaid shown separately instead of combined?

They come from two different CMS data sources with no shared claim identifier, so they can't be reconciled into one number without double-counting or guessing. Every table and chart on this page keeps them fully separate.

Why is there no private/commercial revenue figure?

Private and commercial payer data comes from Transparency in Coverage files, which only publish negotiated rates — not claims or utilization volume. Without a volume figure, no revenue number can be computed for any provider from that data.

What does "Rank" mean in the Competitive Analysis & Benchmarks tables?

For a given CPT/HCPCS code, it's this provider's position by claims volume among all providers billing that same code at that geography level (State, National, or Connecticut for Medicaid) — rank 1 means the highest claims volume for that code.

Why is the Medicaid comparison limited to Connecticut only?

Medicaid is administered per-state with no single national fee schedule, so a state or national comparison the way Medicare has one isn't available. Connecticut (this provider's own state) is the only grouping that's conceptually meaningful.

Why are the numbers rounded to the nearest 10?

To avoid implying more precision than the underlying data supports at a single-provider level. Ratios are kept precise since they're a relative comparison, not a volume or dollar figure.

How current is this data?

The Medicare and Medicaid tables are both single current snapshots, not refreshed on a recurring schedule yet.

Marcus Mayus (NPI 1073734935)

Field	Value
Entity Type	Individual
Organization	Marcus Mayus
Address	81 Holly Hill Ln Fl 3
City	Greenwich
State	CT
ZIP	06830
Taxonomy	Internal Medicine Physician
NPI Enumerated	May 1, 2007

Payer Source	Total Paid
Medicare	$748.4K
Medicaid	$0

Key Findings

This profile is concentrated on Medicare: lifetime Medicare revenue is $748.4K and there is no Medicaid billing on file, so the provider operates as effectively single-payer Medicare for the dataset presented. The absence of any Medicaid codes indicates minimal or no Medicaid patient volume in the available claims data.

Revenue is highly concentrated in a small set of ambulatory evaluation-and-management and care-management services: the top 3 Medicare codes by revenue account for 60.7% of this provider's total Medicare revenue, with 99214 contributing $276K (36.9%), 99490 contributing $98K (13.1%), and 99213 contributing $79.7K (10.7%). This concentration signals that a few office-visit and chronic care management codes drive the majority of billed Medicare dollars.

The code mix is consistent with a primary/internal medicine outpatient practice focused on longitudinal management and preventive care: high-volume office E/M codes 99214 and 99213, significant chronic care management 99490 and 99491, and annual wellness visits G0439/G0438 appear prominently. The presence of vaccines (90694, G0008) and in-office diagnostic testing (87635, 87502, 93000) further supports an integrated ambulatory clinic model that provides routine prevention, testing, and basic diagnostics.

Competitive standing for core office visits is nationally outsized: 99214 ranks #382 of 479517 providers nationally (100th percentile; extreme outlier) and 99213 ranks #4500 of 457151 providers nationally (99th percentile; extreme outlier), indicating this provider bills far above typical national volume for established-patient office visits. By contrast, some care-management and telephonic codes are at high but not anomalous levels—99490 ranks #299 of 16216 (98th percentile; typical, unremarkable) while 99443 ranks #43 of 14283 (100th percentile; extreme outlier), showing mixed dominance across different service types.

Operational footprint implied by utilization mix: heavy reliance on 99214 and 99213 suggests many moderate-complexity face-to-face visits, while strong billing of 99490 and 99491 points to structured chronic care programs that likely use clinical staff under provider direction. The high counts for G0439 (488 claims, $67.3K; ranks #760 of 105855, 99th percentile; extreme outlier) indicate the practice captures Medicare Annual Wellness Visits at well above typical national rates, reinforcing a preventive-care workflow.

Tenure and likely panel stability: the NPI was enumerated 2007-05-01 (~19 years ago), which supports a long-standing practice presence and is consistent with the sustained Medicare billing patterns and high volumes in established-patient E/M codes. Long tenure combined with concentrated revenue in continuity care codes suggests an established panel of Medicare patients rather than a newly opened practice.

Service-line diversification beyond visits: the provider also bills for a range of ancillary services including point-of-care and lab testing (87635, 87502), influenza vaccination (90694, G0008), EKG interpretation (93000), and respiratory function testing (94375). While these codes are smaller revenue contributors individually, their presence indicates the site provides on-site testing and preventive services that complement primary care visits and chronic disease management.

Risk profile for payer strategy and contracting: because Medicaid is absent, payer mix is heavily weighted to Medicare which concentrates revenue and operational risk in a single payer; this could influence negotiations, network participation, and care management investments. The provider’s national outlier status on key Medicare visit codes gives it demonstrable volume leverage within Medicare-oriented networks but provides limited visibility into Medicaid market presence in Connecticut.

Medicare: Complete Services Breakdown

The CPT/HCPCS codes generating the most Medicare revenue for this provider.

29 rows

CPT/HCPCS Code	Description	Claims	Avg Paid	Revenue
99214	The provider sees an established patient for an office visit or other outpatient visit involving evaluation and management. The visit involves a moderate level of medical decision making, and/or the…	2,730	$100	$276K
99490	The clinical staff provides services directed by the provider to support and coordinate a patient’s care across multiple disciplines. The patient has two or more chronic conditions that place the…	2,000	$50	$98K
99213	The provider sees an established patient for an office visit or other outpatient visit involving evaluation and management. The visit involves a low level of medical decision making, and/or the…	1,160	$70	$79.7K
99443	N/A	780	$90	$69.1K
G0439	Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	490	$140	$67.3K
87502	The lab analyst performs a test to determine the presence of multiple types or subtypes of influenza virus through nucleic acid detection using multiplex amplified probe technique and possibly…	190	$90	$18K
87635	Using an amplified nucleic acid probe technique, the lab analyst performs the necessary steps to identify the nucleic acids from the severe acute respiratory syndrome coronavirus 2 (SARS–COV–2) virus…	360	$50	$17.9K
99204	The provider sees a new patient for an office visit or other outpatient visit involving evaluation and management. The visit involves a moderate level of medical decision making, and/or the provider…	150	$120	$17.7K
99491	The provider, a physician or other healthcare professional, personally directs the evaluation and management of a patient with two or more chronic A physician or other qualified healthcare…	250	$70	$17.2K
90694	This code represents a vaccine product administered into the muscle to protect against four strains of influenza (flu). It is an inactivated, adjuvanted, preservative–free vaccine given as a 0.5 mL…	180	$80	$13.7K

Showing 1–10 of 29

Medicare: Competitive Analysis & Benchmarks

How this provider's Medicare billing volume and revenue compare to other providers nationally and within its state, across 29 CPT/HCPCS codes.

View: State1 / 2

Claims Volume vs. Connecticut Distribution

Marcus Mayus — 15 of 25 codes billed far more than typical (above p95)

p5–p95 (all providers)p25–p75MedianThis providerOutlier

Rank Distribution — Connecticut

Full comparison — all codes billed, vs. state median

29 rows

CPT/HCPCS Code	Rank	Provider Count	Median Claims	Avg Paid	Average Revenue
99490	5	170	180	$60	$157.4K
99214	1	6,480	90	$90	$14.2K
G0439	1	1,510	60	$130	$10K
99491	7	40	80	$60	$8.7K
99213	19	6,440	70	$60	$8.1K
99215	341	1,840	30	$130	$6.7K
90694	89	790	40	$70	$5.7K
99496	10	210	20	$220	$4.6K
99204	40	2,660	30	$120	$4.6K
99443	2	190	20	$90	$4.5K

Showing 1–10 of 29

Related Providers

Other providers that share a Tax Identification Number (TIN) with Marcus Mayus, ranked by combined Medicare and Medicaid revenue.

Provider	State	Taxonomy	Medicare Revenue	Medicaid Revenue
Nauman Chaudhry	CT	Retina Specialist (Ophthalmology) Physician	$5.1M	$0
Juner Colina-biscotto	CT	Retina Specialist (Ophthalmology) Physician	$3.7M	$0
Glenn Gandelman	CT	Cardiovascular Disease Physician	$1.7M	$593.4K
Thomas Berenberg	CT	Retina Specialist (Ophthalmology) Physician	$1.5M	$0
Jaime Strachan	CT	Vascular Surgery Physician	$1.5M	$0
Stephanie Sugin	CT	Retina Specialist (Ophthalmology) Physician	$1.4M	$0
Robert Schoen	CT	Rheumatology Physician	$1.3M	$0
Jeffrey Green	CT	Cardiovascular Disease Physician	$1M	$0
Robert Wiznia	CT	Ophthalmology Physician	$228.5K	$644.2K
Andrew Kelsey	CT	Dermatology Physician	$737.2K	$0

Nearby Providers

Other providers in the same ZIP code as Marcus Mayus, ranked by combined Medicare and Medicaid revenue.

Provider	State	Taxonomy	Medicare Revenue	Medicaid Revenue
Greenwich Hospital	CT	General Acute Care Hospital	$0	$46.4M
Family Centers Inc	CT	Mental Health Clinic/Center (Including Community Mental Health Center)	$0	$5.4M
Diagnostic And Medical Specialists Of Greenwich	CT	Internal Medicine Physician	$0	$2.9M
Town Of Greenwich	CT	Local Education Agency (LEA)	$0	$1.4M
Family Centers Inc.	CT	Multi-Specialty Clinic/Center	$0	$1.2M
Julie Gold	CT	Medical Oncology Physician	$632.5K	$0
Kapil Desai	CT	Diagnostic Radiology Physician	$576.8K	$20.4K
Omar Shakir	CT	Ophthalmology Physician	$552K	$0
Richard Connors	CT	Dermatology Physician	$373.9K	$0
Ranee Angeli Lleva	CT	Endocrinology, Diabetes & Metabolism Physician	$347.2K	$0

Marcus Mayus — Billing Profile & Reimbursement Data

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Key Findings

Medicare: Total Revenue Breakdown by CPT/HCPCS Code

Medicare: Complete Services Breakdown

Medicare: Competitive Analysis & Benchmarks

Related Providers

Nearby Providers

Frequently Asked Questions

References