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

Why is the Medicaid comparison limited to Hawaii 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. Hawaii (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.

Christopher Lum (NPI 1053358119)

Field	Value
Entity Type	Individual
Organization	Christopher Lum
Address	1301 Punchbowl St
City	Honolulu
State	HI
ZIP	96813
Taxonomy	Anatomic Pathology & Clinical Pathology Physician
NPI Enumerated	May 31, 2006

Payer Source	Total Paid
Medicare	$842.1K
Medicaid	$0

Key Findings

Service-line profile: Billing is heavily centered on surgical pathology and immunohistochemistry services consistent with an Anatomic Pathology & Clinical Pathology Physician. The single largest code, 88305 (10.5K claims, $59 avg paid/claim, $617.1K revenue), reflects level IV surgical pathology examinations, while 88341 (897 claims, $72 avg paid/claim, $64.6K) and 88342 (585 claims, $84 avg paid/claim, $49.1K) indicate routine use of single-antibody and additional-antibody IHC stains; molecular interpretation (G0452, 209 claims, $37 avg paid/claim, $7.7K) appears present but modest by revenue.

Revenue concentration: Medicare revenue is highly concentrated in a very small set of codes — the precomputed top 3 Medicare codes account for 86.5% of this provider's total Medicare revenue. Within that concentration, 88305 alone represents a dominant share of the reported Medicare revenue (reported as $617.1K of $842.1K total Medicare revenue and noted as 73.0% of this provider's Medicare revenue).

Payer mix / single-payer exposure: The provider reports Total Medicare revenue of $842.1K and no Medicaid billing on file (listed as "none"), making this effectively a Medicare-only billing footprint in the available data. That absence of Medicaid activity indicates limited exposure to Medicaid populations and places operational and reimbursement reliance largely on Medicare volumes.

Competitive standing on top surgical pathology codes: The provider ranks at the high end nationally on core surgical pathology work — 88305 ranks #245 of 14580 providers nationally (98th percentile; notably above typical national volume for this code) and 88304 ranks #104 of 8796 (99th percentile; notably above typical national volume). Those rankings position the provider as a major national-volume performer for core surgical pathology services rather than a low-volume or local-only contributor.

Moderate to high volume but typical IHC activity: Immunohistochemistry codes 88341 and 88342 show substantial claim counts (897 and 585 claims respectively) and together contribute meaningful revenue ($64.6K and $49.1K), but both are characterized as 95th percentile with a label of "typical, unremarkable volume." This suggests the lab performs routine IHC work at a level consistent with many peers rather than as an extreme outlier in IHC specialization.

Tenure and operational stability: The provider's NPI was enumerated on 2006-05-31 (~20 years ago), indicating long-tenured Medicare enrollment. That duration supports the expectation of established referral patterns and an enduring practice footprint in the Honolulu area.

Revenue and service diversification limits: Beyond the top surgical pathology and IHC codes, ancillary services (for example 88312 $35.2K, 88350 $26.7K, G0452 $7.7K, 88344 $3.2K) contribute relatively small shares of Medicare revenue. The distribution shows some complementary lab services are offered, but the provider remains heavily dependent on the primary pathology codes for the bulk of income.

Concentration risk and operational implication: With 73.0% of Medicare revenue tied to code 88305 and the top three codes comprising 86.5% of Medicare revenue, the provider's financial performance is sensitive to changes affecting those specific codes (reimbursement, referral patterns, or coding practice). For analysts and payers, this concentration highlights where utilization review or contract negotiation leverage would be most relevant.

Medicare: Complete Services Breakdown

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

13 rows

CPT/HCPCS Code	Description	Claims	Avg Paid	Revenue
88305	The physician, typically a pathologist, performs a level IV examination of a surgical pathology specimen. The examination includes accessioning the specimen into the lab, which involves formally…	10,460	$60	$617.1K
88341	The lab analyst applies an additional single antibody stain on a slide or slides prepared from the same patient specimen as the initial antibody stain, such as tumor tissue. Then a qualified…	900	$70	$64.6K
88342	The lab analyst applies an initial single antibody stain on a slide or slides prepared from a single patient specimen, such as tumor tissue. Then a qualified provider, typically a pathologist,…	590	$80	$49.1K
88312	The lab analyst performs the technical lab steps to stain a specimen with a special stain. This code applies to Group I for microorganisms. A qualified provider, typically a pathologist, interprets…	370	$100	$35.2K
88350	The analyst performs an immunofluorescent study using a single antibody stain procedure to detect autoimmune disease or an infectious organism in a tissue or cellular sample. Code +88350 describes…	320	$80	$26.7K
88304	The physician, typically a pathologist, performs a level III examination of a surgical pathology specimen. The examination includes accessioning the specimen into the lab, which involves formally…	580	$40	$20.4K
88346	The analyst performs an immunofluorescent study using a single antibody stain procedure to detect autoimmune disease or an infectious organism in a tissue or cellular sample.	80	$110	$8.8K
88313	The lab analyst performs the technical lab steps to stain a specimen for Group II identification, for example an iron stain or trichrome stain. A qualified provider, typically a pathologist,…	120	$70	$8.3K
G0452	Molecular pathology procedure; physician interpretation and report	210	$40	$7.7K
88344	The lab analyst applies a single multiplex antibody stain on a slide or slides prepared from a single patient specimen, such as tumor tissue. Then a qualified provider, typically a pathologist,…	20	$150	$3.1K

Showing 1–10 of 13

Medicare: Competitive Analysis & Benchmarks

How this provider's Medicare billing volume and revenue compare to other providers nationally and within its state, across 13 CPT/HCPCS codes.

View: State1 / 2

Claims Volume vs. Hawaii Distribution

Christopher Lum — 7 of 13 codes billed far more than typical (above p95)

p5–p95 (all providers)p25–p75MedianThis providerOutlier

Rank Distribution — Hawaii

Full comparison — all codes billed, vs. state median

13 rows

CPT/HCPCS Code	Rank	Provider Count	Median Claims	Avg Paid	Average Revenue
88305	1	50	460	$40	$35.1K
88350	1	10	240	$60	$15K
88341	1	30	230	$40	$9.8K
G0452	1	10	210	$40	$7.7K
88342	1	40	90	$50	$5.3K
88346	1	10	50	$90	$4.7K
88312	1	20	40	$60	$4.4K
88307	27	30	60	$70	$4.4K
88344	7	10	40	$80	$3K
88323	1	10	20	$100	$2K

Showing 1–10 of 13

Related Providers

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

Provider	State	Taxonomy	Medicare Revenue	Medicaid Revenue
Hawaii Pathologists' Laboratory	HI	Anatomic Pathology & Clinical Pathology Physician	$0	$3.8M
Complete Dermatology	HI	Dermatology Physician	$0	$379K
Theresa Flament	HI	MOHS-Micrographic Surgery Physician	$303.9K	$0
Casey Phan	HI	Anatomic Pathology & Clinical Pathology Physician	$296.5K	$830
Alex Carcamo	HI	Procedural Dermatology Physician	$152.5K	$0
Joshua Eikenberg	VA	Dermatology Physician	$149.6K	$0
Koah Vierkoetter	HI	Anatomic Pathology & Clinical Pathology Physician	$119.7K	$0
Pamela Tauchi-nishi	HI	Anatomic Pathology & Clinical Pathology Physician	$112.4K	$0
Hiroko Shinoda	HI	Anatomic Pathology & Clinical Pathology Physician	$107K	$0
Eric Yukumoto	HI	Physician Assistant	$98.2K	$0

Nearby Providers

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

Provider	State	Taxonomy	Medicare Revenue	Medicaid Revenue
The Queens Medical Center	HI	General Acute Care Hospital	$0	$200M
Straub Clinic & Hospital	HI	General Acute Care Hospital	$0	$45.6M
State Of Hawaii Dept. Of Health Adult Mental Health Division	HI	Community/Behavioral Health Agency	$0	$29.3M
Positive Behavior Supports Corporation	HI	Community/Behavioral Health Agency	$0	$26.4M
Easter Seals Hawaii	HI	Developmentally Disabled Services Day Training Agency	$0	$16.8M
The Emergency Group, Inc.	HI	Emergency Medicine Physician	$0	$15M
Hawaii Dental Group, Inc.	HI	General Practice Dentistry	$0	$12.4M
The Queen's Medical Center	HI	General Acute Care Hospital	$0	$10.3M
Hawaii Home Care Inc	HI	Nursing Care Agency	$0	$9.3M
Evergreen Adult Day Care	HI	Adult Day Care Clinic/Center	$0	$8.9M

Christopher Lum — Billing Profile & Reimbursement Data

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Christopher Lum — 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