PSC Q504

Overview

The Product Service Code (PSC) system is the U.S. federal government’s standardized taxonomy for classifying products and services in procurement records. PSCs are used in FPDS/SAM reporting and acquisition systems to enable consistent tracking, analysis, and reporting of government spending; the PSC Manual on Acquisition.gov is the authoritative maintenance vehicle for PSC definitions and updates.¹

PSC Q504 — Medical- Dermatology is the PSC label assigned to dermatology clinical services and related professional support when reported in federal procurements. The code is the designated PSC value for dermatology service items in award and solicitation records and appears in the PSC Manual listing used by agencies and FPDS.¹

See also on G2X:

• G2X — PSC Q504
• G2X — PSC Q201
• G2X — NAICS 621111

What this PSC covers

• Dermatology physician services and specialist clinical care
• Dermatopathology consultation and diagnostic services
• Outpatient dermatologic procedures and minor surgery (clinical dermatology scope)
• Dermatologic support personnel and technician services
• Diagnostic skin testing and specimen handling related to dermatology care¹

Related NAICS and PSC codes

Type | Code | Descriptor

• | - | - NAICS | [611310] | Colleges, Universities, and Professional Schools NAICS | [622110] | General Medical and Surgical Hospitals NAICS | [621111] | Offices of Physicians (except Mental Health Specialists)

Source: PSC Manual (Acquisition.gov).¹

Usage notes

• Agencies commonly select PSC Q504 when contracting for clinical dermatology services delivered by or supervised by credentialed dermatology practitioners; FPDS validations and PSC updates are governed by the PSC Manual and FPDS integration rules.¹
• The PSC Manual and FPDS release notes document periodic updates (new or end-dated PSCs, name/definition changes); agencies should consult the current PSC Manual release and FPDS change notes when assigning PSCs.²

Frequently asked questions

• Q: When should PSC Q504 be selected on a solicitation or award?

  A: Use PSC Q504 for procurements principally for dermatology clinical services or staffing where the primary delivered service is dermatologic care or consultation. Agencies must follow the PSC Manual and FPDS reporting rules when assigning PSCs.¹

• Q: Which NAICS codes commonly align with Q504-classified awards?

  A: Actions recorded with Q504 frequently align to medical/clinical NAICS such as 611310, 622110, or 621111, depending on the performing organization. Use the PSC Manual crosswalks and solicitation language to select the best-matching NAICS.¹

• Q: Does Q504 explicitly include teledermatology or remote consults?

  A: The PSC Manual provides the code descriptor but does not provide an explicit telehealth inclusion/exclusion statement for Q504; teledermatology inclusion is not specified by official sources.¹

• Q: Are dermatologic surgical specialties (e.g., Mohs surgery) covered by Q504 or another PSC?

  A: The PSC Manual identifies Q504 for dermatology services generally but does not itemize every procedural subtype; specific surgical or facility-level coding may reference other surgical PSCs depending on procurement scope, so check the current PSC Manual for guidance.¹

• Q: Where can I confirm the authoritative PSC text and recent changes?

  A: Confirm authoritative PSC text and recent revisions in the Product and Service Code Manual on Acquisition.gov, and consult FPDS release notes for system update timing when PSC names or definitions change.¹

Useful resources

• G2X — PSC Q504
• Product and Service Code Manual (Acquisition.gov).¹
• FPDS release notes documenting PSC updates (FPDS).²

References

1. Acquisition.gov — Product and Service Code Manual (PSC listings and authoritative PSC text). https://www.acquisition.gov/content/psc-april-2025.xlsx

2. FPDS — V1.5 SP 21.0 release notes describing Medical Category PSC revisions. https://fpds.gov/wiki/index.php/V1.5_SP_21.0