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 South Dakota for Medicaid) — rank 1 means the highest claims volume for that code.

Why is the Medicaid comparison limited to South Dakota 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. South Dakota (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.

Gregory Wittenberg (NPI 1760418420)

Field	Value
Entity Type	Individual
Organization	Gregory Wittenberg
Address	2820 Mount Rushmore Rd
City	Rapid City
State	SD
ZIP	57701
Taxonomy	Dermatology Physician
NPI Enumerated	June 24, 2006

Payer Source	Total Paid
Medicare	$816K
Medicaid	$0

Key Findings

This provider’s billings are effectively single‑payer: reported Medicare lifetime revenue is $816K while Medicaid revenue is listed as none, indicating no Medicaid billing on file and a practice that, for payers in the dataset, depends exclusively on Medicare reimbursement. Precomputed top‑3 codes account for 53.3% of the provider’s total Medicare revenue, underscoring concentrated revenue dependence on a small set of procedural services.

The top revenue drivers are procedural oncology and reconstructive surgery codes: 17311 and 17312 (Mohs micrographic surgery) and 14061 (adjacent tissue transfer/complex reconstruction) make up the precomputed 53.3% share, which signals a business model centered on skin‑cancer excision with immediate reconstructive care. This mix implies operating capacity for multi‑stage excisions plus same‑session or staged flap/graft procedures rather than a general outpatient clinic mix.

Volume and case mix suggest strong reconstructive workload relative to Mohs throughput: 14061 generates $76.2K (9.8% of Medicare revenue) and ranks #19 of 830 providers nationally (98th percentile, labeled “notably above typical national volume”), indicating unusually high national standing for complex facial/closure procedures. By contrast, Mohs codes 17311 ($199.8K, 25.7%) and 17312 ($139.1K, 17.9%) are high revenue contributors but are described as typical/unremarkable in volume (17311 ranks #409 of 2969, 86th percentile; 17312 ranks #202 of 2770, 93th percentile), which suggests the practice performs routine to above‑average Mohs cases while excelling in reconstructive services.

The provider’s competitive standing is mixed by code: for some reconstructive CPTs the provider is a national outlier (14061 at the 98th percentile; 14060 and 14041 also sit in the low‑to‑mid 90th percentiles), whereas core Mohs activity is strong but not dominant relative to national peers (17311 and 17312 in the 86th–93th percentiles). These rank/percentile placements indicate the provider is a major national participant for certain reconstructive procedures but occupies a more modest, though above‑typical, position for Mohs itself.

Billing distribution emphasizes surgical and procedural revenue over evaluation-and-management fees: 99213 accounts for $24.3K (3.1% of Medicare revenue) and 99212 for $7.8K (1.0%), while high‑revenue procedural codes dominate the top 10 entries. This pattern is consistent with a procedure‑centric dermatologic practice where clinic visits are ancillary to operative throughput rather than the primary revenue source.

Ancillary pathology and intraoperative services appear embedded in the workflow: 88305 shows $11K revenue (1.4%), 88331 $4.1K (0.5%), and 88314 $3.6K (0.5%), and Mohs‑related frozen section work (88314) is present. The presence and size of these pathology line items support an in‑office or closely integrated histopathology/intraoperative consultation capability that aligns with active Mohs procedures and on‑site specimen processing.

The provider has a long tenure in the NPI registry (NPI enumerated 2006-06-24, ~20 years ago), which likely supports an established referral network and the ability to sustain higher‑complexity reconstructive volume. This longevity, combined with the concentrated procedural revenue and the notable national rank on reconstructive codes, suggests an established surgical dermatology practice with a specialized operative focus rather than a general outpatient dermatology practice.

Medicare: Complete Services Breakdown

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

47 rows

CPT/HCPCS Code	Description	Claims	Avg Paid	Revenue
17311	Mohs surgery is a multi–staged procedure that is performed to excise a malignant lesion layer by layer, along with histo–pathological assessment. The assessment is performed to ensure that the…	570	$350	$199.8K
17312	Mohs surgery is a multi–staged method of excising a malignant lesion layer by layer, along with histo–pathological assessment, to ensure negative malignancy of the margins.	430	$330	$139.1K
14061	The provider replaces the lesions in the eyelids, nose, ears, or lips, with the healthy tissues from an adjacent site. This code represents a defect of 10.1 cm2 to 30.0 cm2 in size.	100	$760	$76.2K
14041	The provider replaces the lesions in the forehead, cheeks, chin, mouth, neck, axillae or armpits, genitalia, hands, or feet with the healthy tissues from an adjacent site. This code represents a…	70	$700	$50.9K
14060	The provider replaces the lesions in the eyelids, nose, ears, or lips, with the healthy tissues from an adjacent site. This code represents a defect of 10 cm2 or less.	70	$590	$43K
14301	The provider replaces the lesions in any area with the healthy tissues from an adjacent site. This code represents a defect of 30.1 cm2 to 60.0 cm2.	50	$830	$39.8K
13132	The provider repairs a wound measuring 2.6 cm to 7.5 cm in size of the cheeks, chin, mouth, neck, axillae, genitalia, hands, and/or feet, which may require scar revision, debridement extensive…	190	$200	$37.6K
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…	400	$60	$24.3K
17313	Mohs surgery is a multi–staged method of excising a malignant lesion layer by layer, along with histo–pathological assessment, to ensure negative malignancy of the margins.	60	$410	$23.9K
14021	The provider repairs lesions in the patient’s scalp, arms, or legs by using the healthy tissues from an adjacent site. This code represents a defect of 10.1 cm2 to 30.0 cm2.	20	$680	$15.5K

Showing 1–10 of 47

Medicare: Competitive Analysis & Benchmarks

How this provider's Medicare billing volume and revenue compare to other providers nationally and within its state, across 47 CPT/HCPCS codes.

View: State1 / 2

Claims Volume vs. South Dakota Distribution

Gregory Wittenberg — 6 of 25 codes billed far more than typical (above p95)

p5–p95 (all providers)p25–p75MedianThis providerOutlier

Rank Distribution — South Dakota

Full comparison — all codes billed, vs. state median

47 rows

CPT/HCPCS Code	Rank	Provider Count	Median Claims	Avg Paid	Average Revenue
17311	3	10	410	$320	$120.5K
17312	1	10	130	$270	$43.5K
88305	41	60	1,030	$30	$39.1K
14060	2	10	40	$510	$25.7K
14061	1	10	20	$700	$25.1K
14040	4	10	50	$520	$22.2K
14041	1	10	30	$630	$22.2K
13132	3	20	80	$160	$17.1K
14021	1	10	20	$670	$15.5K
14301	1	10	10	$750	$15K

Showing 1–10 of 47

Related Providers

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

Provider	State	Taxonomy	Medicare Revenue	Medicaid Revenue
Nathan Steinle	CA	Retina Specialist (Ophthalmology) Physician	$9.5M	$0
Prema Abraham	SD	Retina Specialist (Ophthalmology) Physician	$7.1M	$0
Rapid City Medical Center, LLP	SD	Multi-Specialty Clinic/Center	$0	$4.5M
Kyle Thompson	ID	Retina Specialist (Ophthalmology) Physician	$4.5M	$0
Douglas Holmes	WY	Retina Specialist (Ophthalmology) Physician	$4.1M	$0
Mitchell Goff	UT	Retina Specialist (Ophthalmology) Physician	$3.8M	$0
Brendan Girschek	AZ	Ophthalmology Physician	$3.2M	$0
John Bormes	SD	Ophthalmology Physician	$2.6M	$0
John Purviance	WY	Radiation Oncology Physician	$2.5M	$0
Elie Fahed	WY	Medical Oncology Physician	$1.9M	$0

Nearby Providers

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

Provider	State	Taxonomy	Medicare Revenue	Medicaid Revenue
Behavior Management Systems, Inc.	SD	Community/Behavioral Health Agency	$0	$19.8M
Monument Health Rapid City Hospital, Inc	SD	Multi-Specialty Clinic/Center	$0	$18.7M
Monument Health Rapid City Hospital, Inc.	SD	General Acute Care Hospital	$0	$11.5M
Community Health Center Of The Black Hills Inc	SD	Federally Qualified Health Center (FQHC)	$0	$10.2M
Jrk Services, Inc	SD	Home Health Agency	$0	$10.1M
Black Hills Pediatrics, LLP	SD	Pediatrics Physician	$0	$9.7M
Rapid City Emergency Services PA	SD	Emergency Medicine Physician	$0	$8.2M
Wellspring Inc.	SD	Psychiatry Physician	$0	$7.4M
Radiology Associates Prof, LLC	SD	Diagnostic Radiology Physician	$0	$5.3M
Monument Health Rapid City Hospital, Inc.	SD	Multi-Specialty Clinic/Center	$0	$5.2M

Gregory Wittenberg — 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