NAICS Code 621111: Offices of Physicians (except Mental Health Specialists)
National industry
SBA small business size standard: $16 million in average annual receipts
Definition
This U.S. industry comprises establishments of health practitioners having the degree of M.D. (Doctor of Medicine) or D.O. (Doctor of Osteopathic Medicine) primarily engaged in the independent practice of general or specialized medicine (except psychiatry or psychoanalysis) or surgery. These practitioners operate private or group practices in their own offices (e.g., centers, clinics) or in the facilities of others, such as hospitals or HMO medical centers.
Government contracts for this service: PSC Q403 Medical Evaluation and Screening Services
Code facts
- Part of
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62
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621
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6211
- 62111
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6211
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621
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62
- Contract awards
- 797 In the last 12 months
- Contract obligations
- $8,435,497,584 In FY2025
NAICS codes and definitions come from the U.S. Census Bureau, size standards from the SBA and contract spending from SAM.gov/FPDS.
Business activities under NAICS 621111
- Acupuncturists' (MDs or DOs) offices (e.g., centers, clinics)
- Allergists' offices (e.g., centers, clinics)
- Anesthesiologists' offices (e.g., centers, clinics)
- Cardiologists' offices (e.g., centers, clinics)
- Clinical pathologists' offices (e.g., centers, clinics)
- Dermatologists' offices (e.g., centers, clinics)
- Doctors of osteopathy (DOs, except mental health) offices (e.g., centers, clinics)
- DOs' (doctors of osteopathy, except mental health) offices (e.g., centers, clinics)
- Family physicians' offices (e.g., centers, clinics)
- Forensic pathologists' offices
- Gastroenterologists' offices (e.g., centers, clinics)
- Gynecologists' offices (e.g., centers, clinics)
- Health screening services in physicians' offices
- Immunologists' offices (e.g., centers, clinics)
- Internists' offices (e.g., centers, clinics)
- MDs' (medical doctors, except mental health) offices (e.g., centers, clinics)
- Medical doctors' (MDs, except mental health) offices (e.g., centers, clinics)
- Neurologists' offices (e.g., centers, clinics)
- Neuropathologists' offices (e.g., centers, clinics)
- Obstetricians' offices (e.g., centers, clinics)
- Oncologists' offices (e.g., centers, clinics)
- Ophthalmologists' offices (e.g., centers, clinics)
- Orthopedic physicians' offices (e.g., centers, clinics)
- Orthopedic surgeons' offices (e.g., centers, clinics)
- Osteopathic physicians' (except mental health) offices (e.g., centers, clinics)
- Otolaryngologists' offices (e.g., centers, clinics)
- Pathologists' (except oral, speech, voice) offices (e.g., centers, clinics)
- Pathologists', forensic, offices (e.g., centers, clinics)
- Pathologists', neuropathological, offices (e.g., centers, clinics)
- Pathologists', surgical, offices (e.g., centers, clinics)
- Pediatricians' (except mental health) offices (e.g., centers, clinics)
- Physicians' (except mental health) offices (e.g., centers, clinics)
- Plastic surgeons' offices (e.g., centers, clinics)
- Proctologists' offices (e.g., centers, clinics)
- Pulmonary specialists' offices (e.g., centers, clinics)
- Radiologists' offices (e.g., centers, clinics)
- Surgeons' (except dental) offices (e.g., centers, clinics)
- Surgical pathologists' offices (e.g., centers, clinics)
- Urologists' offices (e.g., centers, clinics)
- Walk-in physicians' offices (e.g., centers, clinics)
Show all 40
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Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $449,354,532 |
| FY2026 | $8,358,981,136 |
| FY2025 | $8,435,497,584 |
| FY2024 | $5,128,548,699 |
| FY2023 | $2,924,084,882 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | QTC Medical Services Inc. | $2,601,994,234 | |
| 2 | Optumserve Health Services, Inc. | $1,975,360,999 | |
| 3 | Loyal Source Government Services LLC | $1,838,562,504 | |
| 4 | Veterans Evaluation Services, Inc. | $1,764,030,150 | |
| 5 | Decypher Health Services, LLC | $51,040,077 | |
| 6 | Aims-Usgp JV LLC | $30,401,394 | |
| 7 | Aspire-Luke JV LLC | $29,456,732 | |
| 8 | WJM Professional Services LLC | $29,035,545 | |
| 9 | Cherokee Nation Integrated Health, L.L.C. | $24,624,201 | |
| 10 | Tribal Health, LLC | $22,180,437 |
See the full FY2025 ranking of NAICS 621111 contractors, by parent company.
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of Veterans Affairs | $8,215,208,219 | |
| 2 | Defense Health Agency | $317,946,212 | |
| 3 | Department of Health and Human Services | $98,166,646 | |
| 4 | Department of the Army | $90,592,181 | |
| 5 | Department of Homeland Security | $36,763,731 | |
| 6 | Social Security Administration | $25,612,600 | |
| 7 | Air Force | $8,451,497 | |
| 8 | Department of Justice | $6,043,168 | |
| 9 | Department of Commerce | $1,979,668 | |
| 10 | Department of Agriculture | $1,968,170 |
Top PSC codes by obligations
| Rank | PSC code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Q403 Medical Evaluation and Screening Services | $8,174,904,096 | |
| 2 | Q201 Medical – Managed Healthcare | $161,772,778 | |
| 3 | Q522 Radiology Services | $80,625,394 | |
| 4 | Q401 Nursing | $72,906,707 | |
| 5 | Q999 Other Medical Services | $68,233,623 | |
| 6 | Q601 Medical Coding and Auditing | $41,233,907 | |
| 7 | Q509 Family & Internal Medicine Services | $33,026,216 | |
| 8 | Q501 Anesthesiology Services | $27,130,215 | |
| 9 | Q802 Clerical Medical Support | $24,867,358 | |
| 10 | Q801 Medical Appointing Services | $18,319,092 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | Texas | $3,769,342,343 | |
| 2 | Florida | $1,841,934,741 | |
| 3 | Wisconsin | $1,813,193,224 | |
| 4 | Virginia | $134,184,828 | |
| 5 | Maryland | $46,155,963 | |
| 6 | Arizona | $37,046,215 | |
| 7 | South Dakota | $30,675,777 | |
| 8 | New Mexico | $29,913,209 | |
| 9 | North Carolina | $28,586,312 | |
| 10 | Illinois | $28,272,792 | |
| 11 | Oklahoma | $13,688,640 | |
| 12 | Washington | $12,503,667 | |
| 13 | Minnesota | $12,425,902 | |
| 14 | New York | $11,437,054 | |
| 15 | District of Columbia | $10,370,445 | |
| 16 | Nevada | $9,124,201 | |
| 17 | Hawaii | $7,914,737 | |
| 18 | Colorado | $7,793,995 | |
| 19 | Georgia | $6,376,081 | |
| 20 | Alabama | $6,266,955 | |
| 21 | North Dakota | $5,381,372 | |
| 22 | Kentucky | $4,767,122 | |
| 23 | Tennessee | $4,759,572 | |
| 24 | Mississippi | $4,683,307 | |
| 25 | Pennsylvania | $4,068,392 | |
| 26 | Indiana | $3,853,299 | |
| 27 | Ohio | $3,470,456 | |
| 28 | New Jersey | $3,434,386 | |
| 29 | Utah | $3,127,968 | |
| 30 | Arkansas | $1,397,592 | |
| 31 | Kansas | $1,286,312 | |
| 32 | South Carolina | $1,277,012 | |
| 33 | Missouri | $1,236,720 | |
| 34 | Montana | $1,200,213 | |
| 35 | Idaho | $1,129,899 | |
| 36 | Maine | $1,040,770 | |
| 37 | Nebraska | $998,176 | |
| 38 | Massachusetts | $801,401 | |
| 39 | Oregon | $317,606 | |
| 40 | Alaska | $266,856 | |
| 41 | West Virginia | $232,229 | |
| 42 | Michigan | $211,542 | |
| 43 | Puerto Rico | $175,964 | |
| 44 | New Hampshire | $167,284 | |
| 45 | Iowa | $111,871 | |
| 46 | Connecticut | $99,067 | |
| 47 | Louisiana | $67,400 | |
| 48 | Vermont | $55,023 | |
| 49 | Delaware | $40,550 | |
| 50 | Guam | $13,850 | |
| 51 | U.S. Virgin Islands | $8,420 |
Show all 51
Shares are of everything obligated under NAICS 621111 in the last 12 months before deobligations, including work performed abroad or with no place of performance on record.
Contract opportunities
Show 39 more
Latest 49 of 6,698 listed here. See the rest on GovTribe.
Size standard history
Federal Register rules that named this code
Proposed size standard changes
| Proposed rule | Published | Comments |
|---|---|---|
| Small Business Size Standards: Monetary-Based Industry Size Standards | Closed Oct 21, 2025No final rule found |
From the NAICS codes each rule's amendments to 13 CFR 121.201 name. Rules that print their size standard tables as images aren't listed.
Quick answers
What is NAICS 621111?
NAICS 621111 is Offices of Physicians (except Mental Health Specialists), a national industry in NAICS 62, Health Care and Social Assistance.
What is the NAICS code for forensic pathologists' offices?
The NAICS code for forensic pathologists' offices is 621111, Offices of Physicians (except Mental Health Specialists).
What is the NAICS code for health screening services in physicians' offices?
The NAICS code for health screening services in physicians' offices is 621111, Offices of Physicians (except Mental Health Specialists).
What is the NAICS code for allergists' offices (e.g., centers, clinics)?
The NAICS code for allergists' offices (e.g., centers, clinics) is 621111, Offices of Physicians (except Mental Health Specialists).
When did the size standard for NAICS 621111 last change?
The most recent Federal Register rule on record that names NAICS 621111 in the SBA's size standards is "Small Business Size Standards: Adjustment of Monetary-Based Size Standards, Disadvantage Thresholds, and 8(a) Eligibility Thresholds for Inflation" (87 FR 69118), published Nov 17, 2022 and effective Dec 19, 2022.
How much do federal agencies spend under NAICS 621111?
Federal contracts under NAICS 621111 obligated $8,435,497,584 in fiscal year 2025 and $25,296,466,833 in fiscal years 2023 through 2027.
Who are the largest contractors under NAICS 621111?
The contractors with the most obligated under NAICS 621111 in fiscal years 2026 and 2027 are QTC Medical Services Inc. ($2,601,994,234); Optumserve Health Services, Inc. ($1,975,360,999); and Loyal Source Government Services LLC ($1,838,562,504).
Which agencies buy the most under NAICS 621111?
The agencies that obligated the most under NAICS 621111 in fiscal years 2026 and 2027 are Department of Veterans Affairs ($8,215,208,219), Defense Health Agency ($317,946,212) and Department of Health and Human Services ($98,166,646).
Which PSC codes are used with NAICS 621111?
The PSC codes with the most obligated under NAICS 621111 in fiscal years 2026 and 2027 are Q403 Medical Evaluation and Screening Services, Q201 Medical – Managed Healthcare and Q522 Radiology Services.
Where is the work under NAICS 621111 performed?
By place of performance, the states with the most contract obligations under NAICS 621111 over the last 12 months are Texas ($3,769,342,343), Florida ($1,841,934,741) and Wisconsin ($1,813,193,224).
What is the latest contract opportunity under NAICS 621111?
The latest contract opportunity under NAICS 621111 is Q403-RFP Medical Disability Examinations-Next Generation (MDE-NG), solicitation from VA Strategic Acquisition Center Frederick, posted November 5, 2026.
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