How to Read Your Medical Records

A complete plain-English guide to understanding clinical notes, lab results, discharge summaries, and insurance documents.

In This Guide

  1. Your Rights to Your Medical Records
  2. Anatomy of a Clinical Note
  3. How to Read a Lab Result
  4. The Most Common Lab Tests Explained
  5. Reading a Discharge Summary
  6. Understanding Your Explanation of Benefits (EOB)
  7. Questions to Ask Your Doctor

1. Your Rights to Your Medical Records

Under HIPAA (the Health Insurance Portability and Accountability Act), you have the legal right to access, review, and receive copies of your own medical records. This includes clinical notes, lab results, imaging reports, discharge summaries, and most other documents created during your care.

How to Get Your Records

Pro Tip Download your records after every hospital visit or significant diagnosis. Having a personal copy is invaluable when seeing a new provider, getting a second opinion, or navigating insurance appeals.

2. Anatomy of a Clinical Note

Clinical notes follow a standardized format called SOAP — Subjective, Objective, Assessment, Plan. Understanding this structure helps you navigate any clinical document.

Subjective (S)

What the patient reports — symptoms, concerns, and history in the patient's own words. This section includes the Chief Complaint (CC) and History of Present Illness (HPI). Example:

CC: Chest pain and shortness of breath x 2 days
HPI: 58yo male with PMH of HTN, DM2, and HLD presents with 2-day Hx of exertional CP radiating to left arm, associated with SOB and diaphoresis.

Objective (O)

What the clinician observes and measures — vital signs, physical exam findings, and test results. This section is dense with abbreviations.

VS: T 37.1, HR 88, BP 148/92, RR 16, SpO2 97% on RA
Gen: A&Ox4, NAD
CV: RRR, no m/r/g
Pulm: CTAB
EKG: NSR, no ST changes

Assessment (A)

The clinician's diagnosis or differential diagnosis — their interpretation of the subjective and objective findings.

1. ACS — rule out NSTEMI (troponin pending)
2. HTN, uncontrolled
3. DM2 — HbA1c due

Plan (P)

The treatment plan — what will be done, ordered, prescribed, or referred.

1. Serial EKGs and troponins q6h
2. ASA 325mg PO STAT, heparin drip per ACS protocol
3. Cardiology consult
4. NPO pending further evaluation
5. D/C metformin while admitted

3. How to Read a Lab Result

A typical lab report contains several key pieces of information that you need to understand together to interpret a result correctly.

The Components of a Lab Report

Why Reference Ranges Vary

Reference ranges are established by each laboratory based on the distribution of results from a healthy reference population. They typically represent the range that includes 95% of healthy individuals. This means that 5% of completely healthy people will fall slightly outside the reference range — so a result that is slightly high or low does not necessarily mean something is wrong. Always look at the reference range printed on your specific lab report, not just internet searches, as ranges vary between labs.

Important A single abnormal value is almost never interpreted in isolation. Clinicians look at trends over time, multiple values together (such as all components of a CBC), your symptoms, your medications, and your overall clinical picture. Do not panic about a single out-of-range result before speaking with your provider.

Critical Values

Some lab results are so far outside the normal range that they represent an immediate medical emergency. These are called critical values and laboratories are required to immediately notify the ordering clinician when a critical value is detected. If your lab report shows a critically abnormal value, your provider will contact you promptly — you do not need to wait for a scheduled appointment.

4. The Most Common Lab Tests Explained

Complete Blood Count (CBC)

The CBC measures the three major blood cell types and their characteristics. It is ordered to screen for anemia, infection, clotting disorders, and blood cancers.

ComponentWhat it MeasuresNormal Range (Adult)
WBCInfection-fighting white cells4.5 – 11.0 K/uL
HgbOxygen-carrying hemoglobin11.5 – 17.5 g/dL
HctPercentage of blood that is red cells36 – 50%
PltClot-forming platelets150 – 400 K/uL
MCVAverage red cell size80 – 100 fL

Basic Metabolic Panel (BMP)

The BMP assesses kidney function, electrolyte balance, blood sugar, and acid-base status. It is one of the most commonly ordered panels in both outpatient and inpatient settings.

ComponentWhat it MeasuresNormal Range
Sodium (Na)Primary blood electrolyte135 – 145 mEq/L
Potassium (K)Critical heart/muscle electrolyte3.5 – 5.0 mEq/L
BUNKidney waste filtration7 – 20 mg/dL
Creatinine (Cr)Kidney function marker0.6 – 1.2 mg/dL
GlucoseBlood sugar level70 – 99 mg/dL (fasting)
eGFREstimated kidney filtration rate>60 mL/min

Lipid Panel

The lipid panel measures cholesterol and triglyceride levels to assess cardiovascular risk. It should be drawn fasting for the most accurate results.

ComponentOptimal LevelHigh Risk Threshold
Total Cholesterol<200 mg/dL>240 mg/dL
LDL (bad cholesterol)<100 mg/dL>160 mg/dL
HDL (good cholesterol)>60 mg/dL<40 mg/dL
Triglycerides<150 mg/dL>200 mg/dL

5. Reading a Discharge Summary

A hospital discharge summary is a document created when you leave the hospital that summarizes your entire admission. It is one of the most important documents you will receive from a hospitalization and should be kept in your personal health records.

Key Sections of a Discharge Summary

Critical Step After Any Hospitalization Review your discharge medication list carefully against the medications you were taking before admission. Medication errors at transitions of care are common and potentially dangerous. Ask your pharmacist to perform a medication reconciliation — comparing your pre-admission and post-discharge medication lists.

6. Understanding Your Explanation of Benefits (EOB)

An Explanation of Benefits is sent by your insurance company after a claim is processed. It is not a bill — it is an informational document showing how your claim was handled. Understanding the EOB helps you verify you were billed correctly and understand your financial responsibility.

Key Sections of an EOB

Why the EOB Matters

Medical billing errors are surprisingly common — estimates suggest they occur in 30 to 80 percent of medical bills. Comparing your EOB against the actual bill you receive from the provider helps identify duplicate charges, services you didn't receive, or incorrect billing codes. If you find a discrepancy, contact both your insurance company and the provider's billing department.

7. Questions to Ask Your Doctor

Armed with an understanding of your medical records, here are the most important questions to ask at your next appointment:

About Your Diagnosis

About Your Lab Results

About Your Medications

About Your Care Plan

Educational Reference Only. This guide is provided for general informational purposes and does not constitute medical advice. Always consult a qualified healthcare provider regarding your specific medical situation, records, and test results.