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Industry · Form 5500 business code 621510
Medical & Diagnostic Laboratories: retirement plans
Plans whose sponsor entered this principal business activity code on Form 5500.
Form 5500 information is as filed by the plan administrator with the Department of Labor and may be amended. Figures reflect the plan year shown, not current balances. The business code is chosen by the filer from the list in the Form 5500 instructions.
For plan year 2024, 183 retirement plans in medical & diagnostic laboratories with 100 or more participants filed Form 5500: 178 defined contribution and 5 defined benefit. They reported 342,530 participant records and $21.2B in net assets, counting every plan on the form.
The median defined contribution plan held $46,496 per participant, below the national median of $53,031, and its employer put in $2,331 per active participant (national: $2,174). Among plans reporting Schedule C compensation the median was $111 per participant against $123 nationally.
Employers contributed $589M and participants $1.27B during the year, and the plans paid out $2.37B in benefits.
In 2009 the same group numbered 205 plans with $5.73B; by 2024 it was 183 plans (down 11%) and $21.2B (up 269%). From plan year 2023 the 100-participant line counts participants with account balances, which moved many plans to the short form.
Medians compared with all US plans
| Median plan, plan year 2024 | Industry: DC | US: DC | Industry: DB | US: DB |
|---|---|---|---|---|
| Net assets per participant | $46,496 | $53,031 | $62,396 | $86,234 |
| Employer contributions per active participant | $2,331 | $2,174 | $3,645 | $10,244 |
| Schedule C compensation per participant | $111 | $123 | $226 | $344 |
| Schedule C compensation, share of net assets | 0.25% | 0.26% | 0.40% | 0.42% |
| Administrative expenses per participant | $107 | $116 | $489 | $527 |
Medians across plans with 100 or more participants (165 DC and 5 DB plans with a Schedule H here). Fee medians cover plans reporting an amount. DC: defined contribution, such as 401(k) and 403(b). DB: defined benefit pension.
Distribution of DC plans
| Measure | 25th percentile | Median | 75th percentile | Plans |
|---|---|---|---|---|
| Net assets per participant | $30,664 | $46,496 | $77,373 | 165 |
| Employer contributions per active participant | $1,363 | $2,331 | $4,206 | 149 |
| Schedule C compensation per participant | $50.76 | $111 | $203 | 154 |
| Administrative expenses per participant | $42.56 | $107 | $220 | 160 |
Trend by plan year
| Plan year | Plans 100+ | Participants | Net assets | Employer contributions | Participant contributions | Median DC assets / participant | Median DC Sch. C / participant |
|---|---|---|---|---|---|---|---|
| 2025partial | 34 | 83,037 | $7.73B | $165M | $336M | $53,614 | $136 |
| 2024 | 183 | 342,530 | $21.2B | $589M | $1.27B | $46,496 | $111 |
| 2023 | 196 | 328,059 | $18.9B | $572M | $1.20B | $42,383 | $86.53 |
| 2022 | 224 | 313,837 | $15.6B | $507M | $1.11B | $32,015 | $81.40 |
| 2021 | 217 | 293,504 | $18.5B | $440M | $959M | $39,242 | $85.45 |
| 2020 | 209 | 274,955 | $16.1B | $350M | $720M | $38,953 | $86.39 |
| 2019 | 208 | 259,709 | $12.9B | $353M | $676M | $36,461 | $71.84 |
| 2018 | 206 | 252,468 | $10.6B | $307M | $605M | $29,985 | $66.21 |
| 2017 | 208 | 245,807 | $11.3B | $323M | $554M | $31,759 | $49.47 |
| 2016 | 207 | 243,409 | $9.70B | $296M | $530M | $27,583 | $49.78 |
| 2015 | 199 | 234,392 | $8.99B | $268M | $501M | $26,745 | $59.00 |
| 2014 | 198 | 228,579 | $8.88B | $247M | $444M | $27,137 | $43.10 |
| 2013 | 198 | 221,806 | $8.60B | $271M | $432M | $27,688 | $41.38 |
| 2012 | 197 | 229,362 | $7.69B | $280M | $440M | $25,388 | $32.85 |
| 2011 | 198 | 224,849 | $6.54B | $264M | $404M | $23,059 | $31.00 |
| 2010 | 201 | 223,935 | $6.57B | $255M | $392M | $23,662 | $34.17 |
| 2009 | 205 | 221,789 | $5.73B | $249M | $376M | $19,761 | $28.08 |
Plan year is the year in which the plan year began. The drop in large plans from 2023 follows a rule change: the 100-participant line now counts participants with account balances, so many plans moved to the short form.
Provider share
Service provider organisations named most often on the Schedule C of the 183 plans on this page's list, by number of plans. A plan usually names several providers.
Largest plans
The 40 largest by participants of 183 plans with a page on this site.
| Plan | Sponsor | State | Type | Participants | Net assets | Per participant | Employer / active | Sch. C / participant |
|---|---|---|---|---|---|---|---|---|
| Laboratory Corporation of America Holdings 401(k) Savings Plan | Laboratory Corporation of America Holdings | NC | DC | 67,355 | $4.48B | $66,483 | $2,331 | $52.09 |
| The Quest Diagnostics Profit Sharing Plan | Quest Diagnostics Clinical Laboratories, Inc. | NJ | DC | 63,189 | $6.23B | $98,571 | $2,176 | $32.09 |
| Tryko Partners, LLC 401(k) Plan | Tryko Partners, LLC | NJ | DC | 14,106 | $51.1M | $3,619 | $387 | $6.43 |
| H Lee Moffitt Cancer Center and Research Inst 403(b) Retire Plan | H. Lee Moffitt Cancer Center | FL | DC | 12,087 | $803M | $66,417 | — | $30.43 |
| Radnet 401(k) Plan | Radnet, Inc. | CA | DC | 11,814 | $437M | $36,954 | $373 | $73.44 |
| H. Lee Moffitt Cancer Center & Research Inst, Inc. Retire Plan | H. Lee Moffitt Cancer Center | FL | DC | 11,141 | $505M | $45,303 | $4,631 | $24.23 |
| Sonic Healthcare USA Savings Plan | Sonic Healthcare USA, Inc. | TX | DC | 11,089 | $588M | $53,006 | $1,390 | $39.37 |
| GE Healthcare Legacy Affiliates Pension Plan | GE Healthcare Technologies Inc. | IL | DB | 10,569 | $659M | $62,396 | $12,736 | $170 |
| Laboratory Corporation of America Holdings Cash Balance Retirement Plan | Laboratory Corporation of America Holdings | NC | DB | 8,934 | $196M | $21,931 | — | $226 |
| Exact Sciences Corporation 401(k) Plan | Exact Sciences Corporation | WI | DC | 8,867 | $749M | $84,446 | $6,549 | $26.01 |
| Natera 401(k) Plan | Natera | CA | DC | 5,535 | $301M | $54,460 | $2,357 | $24.05 |
| Modernatx, Inc. 401(k) Plan | Modernatx, Inc. | MA | DC | 5,468 | $650M | $118,893 | $9,596 | $29.99 |
| Simonmed 401(k) Profit Sharing Plan | Simonmed Imaging, Inc. | AZ | DC | 4,818 | $50.1M | $10,402 | $0 | $98.82 |
| Fortrea 401(k) Plan | Fortrea Inc. | NC | DC | 4,818 | $606M | $125,783 | $5,280 | $130 |
| Akumin 401(k) Plan | Akumin Inc. | FL | DC | 4,803 | $164M | $34,052 | $718 | $115 |
| Alverno Provena Hospital Laboratories, Inc. Retirement Savings Plan | Alverno Provena Hospital Laboratories, Inc. | IN | DC | 4,664 | $140M | $29,947 | $1,726 | $55.78 |
| Cdi Management Corp. 401(k) Profit Sharing Plan | Cdi Management Corp. | MN | DC | 4,586 | $320M | $69,751 | $2,036 | $19.65 |
| Pathgroup 401(k) Savings Plan | Associated Pathologists, LLC | TN | DC | 4,402 | $117M | $26,579 | $1,609 | $21.80 |
| Myriad Genetics, Inc. 401(k) Profit Sharing Plan | Myriad Genetics, Inc. | UT | DC | 3,909 | $458M | $117,195 | $3,741 | $50.42 |
| Neogenomics Laboratories, Inc. 401(k) Profit Sharing Plan | Neogenomics Laboratories, Inc. | FL | DC | 2,656 | $201M | $75,647 | $3,703 | $88.18 |
| One Call Combined 401(k) Profit Sharing Plan | One Call Corporation | FL | DC | 2,644 | $97.7M | $36,940 | $1,307 | $138 |
| Solis Mammography 401(k) Plan | Comprehensive Breast Care Center of Texas, Inc. | TX | DC | 2,601 | $94.4M | $36,294 | $1,615 | $83.69 |
| Guardant Health 401(k) Plan | Guardant Health, Inc. | CA | DC | 2,395 | $193M | $80,583 | $3,856 | $27.75 |
| Irhythm Technologies 401(k) Plan | Irhythm Technologies | CA | DC | 2,238 | $133M | $59,407 | $3,283 | $6.21 |
| Caris Science, Inc. 401(k) Plan | Caris Science, Inc. | TX | DC | 2,123 | $141M | $66,461 | $4,389 | $132 |
| Tricore Reference Laboratories 401(k) Plan | Tricore Reference Laboratories | NM | DC | 2,070 | $117M | $56,566 | $2,247 | $142 |
| United Digestive 401(k) Plan | Atlanta Gastroenterology Associates | GA | DC | 1,781 | $91.3M | $51,242 | $1,996 | $88.77 |
| Shields Health Care Group 401(k) Profit Sharing Plan | Shields Health Care Group, Inc. | MA | DC | 1,621 | $104M | $64,020 | $990 | $106 |
| Inari Medical, Inc. 401(k) Plan | Inari Medical, Inc. | CA | DC | 1,590 | $118M | $74,164 | $9,084 | $17.13 |
| Fulgent Therapeutics LLC 401(k) Profit Sharing Plan | Fulgent Therapeutics LLC | CA | DC | 1,589 | $133M | $83,567 | $3,432 | $107 |
| Grail 401(k) Plan | Grail, Inc. | CA | DC | 1,428 | $151M | $105,472 | $3,288 | $108 |
| Millennium Health, LLC 401(k) Profit Sharing Plan | Millennium Health, LLC | CA | DC | 1,335 | $48.1M | $35,993 | $1,069 | $61.92 |
| Novavax, Inc. 401(k) Profit Sharing Plan | Novavax, Inc. | MD | DC | 1,329 | $113M | $85,173 | $7,155 | $187 |
| Scri Holdings, LLC 401(k) Plan | Scri Holdings, LLC | TN | DC | 1,300 | $44.5M | $34,217 | $3,390 | $58.96 |
| Better Health Retirement Plan | Better Health Group Services, Inc. | FL | DC | 1,201 | $29.4M | $24,458 | $1,505 | $83.51 |
| Radiology Regional Center, P. a. PROFIT-SHARING/401(K) Plan | Radiology Regional Center, P.A. | FL | DC | 1,123 | $34.3M | $30,512 | $2,535 | $12.50 |
| Mako Medical Laboratories LLC 401(k) Plan | Mako Medical Laboratories LLC | NC | DC | 1,069 | $8.1M | $7,557 | $411 | $37.79 |
| Rezolut 401(k) Plan | Rezolut, LLC | GA | DC | 1,049 | $8.9M | $8,489 | — | — |
| Accu Reference Medical Lab LLC 401(k) Profit Sharing Plan and T | Accu Reference Medical Lab LLC | NJ | DC | 1,028 | $6.8M | $6,591 | — | $119 |
| Aegis Sciences Corporation 401(k) Plan | Aegis Sciences Corporation | TN | DC | 1,025 | $47.7M | $46,496 | $1,501 | $6.32 |
By plan size
By state
Questions and answers
How many retirement plans are there in medical & diagnostic laboratories?
183 plans with 100 or more participants filed Form 5500 for plan year 2024, out of 317 pension plans on the full form. Smaller plans file Form 5500-SF and are counted separately where shown.
What is the typical 401(k) balance in medical & diagnostic laboratories?
The median defined contribution plan reported $46,496 in net assets per participant (middle half of plans: $30,664 to $77,373); nationally it was $53,031. This is a plan-level average that includes former employees, not a typical person's balance.
What do employers contribute in medical & diagnostic laboratories?
The median defined contribution plan received $2,331 in employer contributions per active participant, against $2,174 nationally. Plans with no employer contribution are included at zero.
What are average 401(k) fees in medical & diagnostic laboratories?
Among defined contribution plans that report any Schedule C compensation, the median was $111 per participant and 0.25% of net assets (nationally $123 and 0.26%). Schedule C leaves out fund expense ratios and fees the employer pays, so it understates total cost.
Where does this come from?
Form 5500 annual reports in the EBSA research files, with filings received through 24 Aug 2026. Medians are computed by this site across plans with 100 or more participants.
Provenance
Source: U.S. Department of Labor, Employee Benefits Security Administration, Form 5500 research files, public domain, with filings received through 24 Aug 2026. Totals count every pension plan on the full form; medians and the plan list cover plans with 100 or more participants. See the methodology.