Can Medical Assistants Draw Blood in California?

Yes, medical assistants can draw blood in California, but only after specific training and only while a qualified supervisor is physically present in the facility. California Business and Professions Code Section 2070 authorizes medical assistants to perform venipuncture and skin puncture for the purpose of withdrawing blood.¹ Medical assistants are unlicensed under California law, so the authority is never independent. Every draw happens under a supervising provider’s authorization and presence.²

Training an MA Needs Before the First Draw

California Code of Regulations Title 16, Section 1366.1 sets the minimums. For venipuncture and skin puncture, a medical assistant must complete at least 10 clock hours of training covering both procedures, and must satisfactorily perform at least 10 venipunctures and 10 skin punctures under observation before working on patients independently.³

These are floors, not ceilings. Training continues until the MA demonstrates proficiency to the satisfaction of the supervising physician, podiatrist, or program instructor who signs off.² Venipuncture training is a separate track from injection training; the 10 clock hours required for blood draws are distinct from the 10 clock hours required for injections and skin tests, though many programs bundle both.³

Who Must Be On-Site to Supervise

Business and Professions Code Section 2069(b)(3) defines who counts as a supervisor for medical assistant procedures. The authorized supervisors are a licensed physician and surgeon (MD or DO), a licensed podiatrist within the scope of podiatric practice, a physician assistant working under a supervising physician’s practice agreement, a nurse practitioner with an active California NP license, and a certified nurse-midwife within their scope of practice.⁴

The supervisor does not have to stand in the room watching every needle stick, but they must be somewhere in the facility and immediately available to step in if something goes wrong. An MA drawing blood in a clinic while the only authorized supervisor sits at a different office location would violate the law.

Optometrists are not on the approved supervisor list. If the only provider on-site is an optometrist, no blood draws by an MA during that time.

Where MAs Can and Cannot Draw Blood

Medical assistants are authorized to work in medical offices and clinic settings. California law prohibits MAs from being employed for inpatient care in a licensed general acute care hospital.⁵ An MA who draws blood at a family practice or outpatient clinic is operating within legal bounds. That same person cannot perform blood draws on hospital inpatients, even if the training is identical. The restriction attaches to the employment setting, not just the task.

What’s Still Off-Limits for a Trained MA

The blood-draw authorization is narrow. Even with full training, medical assistants in California cannot:

Perform arterial punctures. Drawing from arteries is outside MA scope entirely, regardless of training.
Start IV lines or connect infusion tubing.⁵
Push medications through an IV.⁵
Diagnose conditions, prescribe medications, or perform any task that requires independent clinical judgment.
Interpret test results. An MA can measure and record a skin test reaction, for instance, but reading what it means is the provider’s job.⁵
Dispense controlled substances, even though MAs may hand patients pre-packaged, properly labeled prescription drugs that a provider has ordered.⁵

MA Authority vs. a Phlebotomy Technician Certificate

California also has a separate credential administered by the California Department of Public Health. A Certified Phlebotomy Technician I (CPT-I) certificate requires substantially more training than the MA minimum: at least 40 hours of clinical experience, a minimum of 50 successful venipunctures and 10 skin punctures, and observation of arterial punctures.⁶

Someone whose primary job is drawing blood in a clinical laboratory typically needs the CPT-I. Medical assistants draw blood under the authority of Section 2070, where phlebotomy is one task inside a broader clinical support role. If an MA’s position gradually shifts until blood draws become essentially all they do, the employer may need to revisit whether the CPT-I requirement applies.

Safety Rules at the Chair

Any medical assistant drawing blood works under an employer bound by OSHA’s Bloodborne Pathogens Standard. The standard requires employers to maintain a written Exposure Control Plan, updated at least annually, designed to eliminate or reduce exposure to pathogens like HIV and hepatitis B.⁷

At the point of care, this translates into a handful of specifics:

Treat all blood as potentially infectious. Gloves are mandatory for every draw and get replaced when contaminated.
Contaminated needles are not bent, recapped by hand, or broken. They go directly into a puncture-resistant, leak-proof sharps container, sealed when about three-quarters full.⁸
Employers must provide and require the use of needles and sharps with built-in injury protections, as mandated by the Needlestick Safety and Prevention Act.⁹
The employer must offer the hepatitis B vaccine series at no cost within 10 working days of the MA’s initial assignment to duties involving blood exposure.⁷
Bloodborne pathogen training is required at initial assignment and at least once a year after.

After any needlestick or blood exposure, the employer must immediately provide a confidential medical evaluation, testing, post-exposure treatment if indicated, and counseling, at no cost to the employee.⁷

Who Is Liable If Something Goes Wrong

Because medical assistants are unlicensed and work under supervision, legal responsibility flows upward. Under respondeat superior, a supervising physician or the employing practice can be held liable in a malpractice claim when an MA’s blood draw injures a patient, as long as the MA was acting within the scope of assigned duties.

The supervising provider faces exposure on two fronts. One is vicarious liability for the MA’s negligence. The other is direct liability for negligent supervision, which could apply if the provider authorized an MA to draw blood despite knowing the MA lacked proper training, or if the provider was not actually present in the facility as required. Delegating blood draws to an unqualified MA can also be grounds for disciplinary action against the supervisor’s professional license by the Medical Board of California.

For medical assistants personally, working without the required training or outside the authorized scope could trigger consequences under California’s prohibitions on unlicensed practice. Many malpractice insurance carriers now require MAs to hold a professional credential, adding another practical layer of protection for both the assistant and the practice.

1
California Legislative Information. California Business and Professions Code 2070
2
Medical Board of California. Medical Assistants FAQs
3
Legal Information Institute. California Code of Regulations Tit. 16, 1366.1 – Training to Perform Venipuncture, Injections and Inhalation of Medication
4
Physician Assistant Board. Supervision of Medical Assistants by Physician Assistants
5
Medical Board of California. Medical Assistants
6
California Department of Public Health. Phlebotomy Technician I CPT I Certificate
7
eCFR. 29 CFR 1910.1030 Bloodborne Pathogens
8
U.S. Food and Drug Administration. Sharps Disposal Containers in Health Care Facilities
9
Occupational Safety and Health Administration. Needlestick Safety and Prevention Act