Comprehensive Study Guide
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Overview
Insurance and billing is a critical competency for pharmacy technicians, covering how prescriptions are submitted, processed, and reimbursed through third-party payers. This guide covers claim submission standards, reimbursement formulas, plan terminology, rejection codes, and government programs. Mastery of these concepts is essential for both the PTCB exam and daily pharmacy operations.
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Section 1: Claim Submission & Processing
How Electronic Claims Work
When a patient presents an insurance card, the pharmacy technician collects key information and submits an electronic claim to the appropriate payer for adjudication (real-time processing and payment determination).
Key Card Identifiers
| Field | Full Name | Purpose |
|---|---|---|
| BIN | Bank Identification Number | 6-digit number; routes the claim to the correct insurer or PBM |
| PCN | Processor Control Number | Optional; further routes claim to a specific sub-plan within the BIN |
| Group # | Group Number | Identifies the employer group or benefit plan |
| Member ID | Member Identification | Identifies the specific insured patient |
Claim Format Standard
• NCPDP D.0 (National Council for Prescription Drug Programs) is the universal electronic format used by pharmacies to submit claims to third-party payers.
• Think of it as the "language" all pharmacies and payers speak when communicating electronically.
Coordination of Benefits (COB)
When a patient has more than one insurance plan, COB determines the order of payment:
• Primary insurance – billed first; pays its portion
• Secondary insurance – billed second; may cover some or all of the remaining balance
• Tertiary insurance – billed third (e.g., patient assistance programs)
> Common COB scenarios: A child covered by both parents' plans, or a Medicare patient who also has employer coverage (Medigap).
Reject vs. Denial – A Critical Distinction
| Term | Meaning | Action |
|---|---|---|
| Reject | Technical/data error (wrong DOB, incorrect BIN, invalid NDC format) | Correct the error and resubmit |
| Denial | Claim received correctly but coverage is not approved | Requires PA, formulary change, or patient pays out-of-pocket |
Key Terms – Claim Submission
• Adjudication – Real-time electronic processing of a pharmacy claim
• BIN – Routes claim to the correct insurance company/PBM
• PCN – Sub-routes within the same BIN
• NCPDP D.0 – Standard electronic claim format
• COB – Process for billing multiple insurances in order
• Reject – Correctable data/technical error
• Denial – Coverage refused (not a data error)
⚠️ Watch Out For
• Students commonly confuse "reject" and "denial." Remember: a reject = fixable error; a denial = coverage issue.
• The BIN is always 6 digits — memorize this.
• COB must be billed in the correct primary → secondary order or claims will reject.
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Section 2: Reimbursement & Pricing
The Reimbursement Formula
Most insurance plans reimburse pharmacies using this basic formula:
> Reimbursement = Drug Ingredient Cost + Dispensing Fee
> (but never more than the Usual & Customary price)
Drug Pricing Benchmarks
#### Average Wholesale Price (AWP)
• A published benchmark price from pricing compendia (e.g., Red Book)
• Insurance plans often reimburse at a discount from AWP (e.g., AWP – 15%)
• AWP is not the actual price pharmacies pay — it is a reference point
#### Maximum Allowable Cost (MAC)
• A payer-set price ceiling for generic and multi-source drugs
• The insurance will only reimburse up to the MAC amount, regardless of what the pharmacy actually paid
• If the pharmacy's acquisition cost exceeds the MAC, the pharmacy absorbs the loss
• MAC lists are maintained by each individual PBM
#### Usual & Customary (U&C) Price
• The price a pharmacy charges a cash-paying customer
• Insurance reimbursement cannot exceed U&C
• If U&C < calculated reimbursement → payer pays the lower U&C amount
• This prevents pharmacies from inflating cash prices to get higher insurance payouts
#### Dispensing Fee
• A fixed dollar amount added to each claim
• Compensates the pharmacy for professional services, overhead, counseling, and operational costs
• Typically ranges from $1–$3 per claim (varies by payer contract)
Pricing Concept Quick Comparison
| Concept | Set By | Applies To | Key Point |
|---|---|---|---|
| AWP | Publishers/Compendia | Brand & generic | Reference benchmark; not actual cost |
| MAC | PBM/Payer | Generics/multi-source | Price ceiling for generics |
| U&C | Pharmacy | All drugs | Reimbursement cap |
| Dispensing Fee | Payer contract | All claims | Flat fee per prescription |
Key Terms – Reimbursement & Pricing
• AWP – Average Wholesale Price; published benchmark used in reimbursement formulas
• MAC – Maximum Allowable Cost; payer's price ceiling for generics
• U&C – Usual and Customary; cash price; acts as reimbursement ceiling
• Dispensing fee – Fixed compensation for professional dispensing services
• Acquisition cost – Actual price the pharmacy paid for the drug
⚠️ Watch Out For
• AWP is not the actual cost pharmacies pay — it is only a benchmark. The actual cost is the acquisition cost.
• The U&C rule trips up many students: if the cash price is lower than what insurance would pay, insurance pays the lower amount.
• MAC lists vary by PBM — there is no single universal MAC list.
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Section 3: Plan & Coverage Terms
Formulary
• A list of covered drugs organized into tiers
• Higher tiers = higher patient cost-sharing
| Tier | Typically Includes | Patient Cost |
|---|---|---|
| Tier 1 | Preferred generics | Lowest copay |
| Tier 2 | Non-preferred generics | Moderate copay |
| Tier 3 | Preferred brand-name | Higher copay |
| Tier 4+ | Non-preferred/specialty | Highest copay or % coinsurance |
Prior Authorization (PA)
• A prescriber must obtain advance approval from the insurance plan before a drug is covered
• Required for: expensive medications, specialty drugs, non-formulary drugs, drugs with abuse potential
• Pharmacy technician's role: Notify the pharmacist → pharmacist contacts prescriber → prescriber submits PA to insurer
Step Therapy
• Patient must try lower-cost/preferred drugs first before the plan covers a more expensive alternative
• Example: Must try metformin → then another oral agent → before insulin is covered
• Sometimes called a "fail-first" policy
Cost-Sharing Terms
| Term | Definition | When It Applies |
|---|---|---|
| Deductible | Annual out-of-pocket amount before insurance pays | At the start of the plan year |
| Copay | Fixed dollar amount per prescription | After deductible is met |
| Coinsurance | Percentage of drug cost paid by patient | After deductible; used in some plans |
| Out-of-pocket maximum | Annual cap on patient spending | Protects from catastrophic costs |
Medicare Part D – The "Donut Hole" (Coverage Gap)
Medicare Part D has four phases of coverage:
1. Deductible Phase – Patient pays 100% until deductible is met
2. Initial Coverage Phase – Patient pays standard copays/coinsurance
3. Coverage Gap ("Donut Hole") – Patient pays a higher percentage of drug costs after total plan spending hits a set threshold
4. Catastrophic Coverage Phase – Patient pays a small copay or coinsurance; plan covers the rest
> Note: The Inflation Reduction Act (2024) effectively closed the donut hole — patient out-of-pocket costs under Part D are now capped. Be aware of recent changes for the PTCB exam.
Key Terms – Plan & Coverage
• Formulary – Insurer's approved drug list, organized by tiers
• PA (Prior Authorization) – Pre-approval required for certain drugs
• Step therapy – "Fail-first" requirement to try preferred drugs before others
• Deductible – Annual amount paid before coverage begins
• Copay – Fixed per-prescription patient payment
• Coinsurance – Percentage-based patient payment
• Donut hole – Medicare Part D coverage gap
⚠️ Watch Out For
• Deductible ≠ Copay: Deductible is annual and paid first; copay is per prescription after deductible.
• Step therapy and PA are separate requirements — a drug may require both.
• The donut hole applies specifically to Medicare Part D, not other insurances.
• Non-formulary does not always mean the drug is unavailable — a PA or exceptions process may still allow coverage.
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Section 4: Adjudication & Rejection Codes
Common Rejection Codes
| Code/Message | Meaning | Technician Action |
|---|---|---|
| 75 – Prior Authorization Required | Plan requires prescriber approval | Notify pharmacist → pharmacist contacts prescriber to initiate PA |
| Refill Too Soon | Patient refilling before allowed window (typically 75–80% of days supply used) | Inform patient; note earliest fill date; resubmit when eligible |
| NDC Not Covered | The specific NDC is not on the formulary | Contact pharmacist; switch to formulary generic/alternative with prescriber approval |
| Patient Not Found | Member ID, name, or DOB does not match plan records | Verify insurance card info; correct data entry |
| Plan Limitations Exceeded | Quantity or refill limits reached | Notify pharmacist; may need PA for quantity override |
Refill Too Soon – The Math
Most plans require 75–80% of days supply to have elapsed before allowing a refill.
> Example: 30-day supply → eligible for refill after approximately 22–24 days
NDC Not Covered – Resolution Steps
1. Verify NDC was entered correctly
2. Check if a generic equivalent is available and covered
3. Contact prescriber for a therapeutic alternative
4. If brand is medically necessary, initiate prior authorization
Key Terms – Adjudication & Rejections
• Adjudication – Real-time insurance claim processing
• Reject code 75 – Prior authorization required
• Refill too soon – Days supply threshold not met
• NDC – National Drug Code; 11-digit drug identifier
• Days supply – Number of days the dispensed quantity should last
⚠️ Watch Out For
• Technicians do not contact prescribers for clinical matters — this is the pharmacist's role. Technicians notify the pharmacist.
• "Refill too soon" does not mean the prescription is expired or invalid — only that timing is off.
• NDC has a specific 11-digit format (5-4-2); entering it incorrectly causes rejects.
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Section 5: Government & Special Programs
Medicare Part B vs. Part D
| Feature | Medicare Part B | Medicare Part D |
|---|---|---|
| Coverage type | Medically administered drugs | Outpatient self-administered drugs |
| Where dispensed | Doctor's office, clinic, hospital outpatient | Retail/mail-order pharmacy |
| Examples | Chemotherapy, injectable biologics, vaccines (flu) | Oral medications, inhalers, insulin |
| Billing | Medical claim (not pharmacy claim) | Pharmacy claim (NCPDP format) |
> Memory Tip: Part B = Billed medically (doctor/clinic); Part D = Dispensed at pharmacy
Medicare Part A, B, C, D – Quick Reference
| Part | Covers |
|---|---|
| A | Hospital inpatient, skilled nursing facility |
| B | Outpatient medical services, certain drugs |
| C | Medicare Advantage (combines A+B, often includes D) |
| D | Outpatient prescription drugs (pharmacy) |
Medicaid Drug Rebate Program
• Manufacturers must pay rebates to state/federal Medicaid programs to have their drugs covered under Medicaid
• Purpose: Reduce the net cost to the government for expensive drugs
• Does NOT directly affect pharmacy reimbursement rates — pharmacies are still paid based on state Medicaid fee schedules
• Dual-eligible patients (Medicare + Medicaid) have both programs coordinate benefits
PBM (Pharmacy Benefit Manager)
A PBM is the "middleman" between insurers/employers and pharmacies:
PBM Functions:
• Process and adjudicate pharmacy claims
• Negotiate drug prices with manufacturers
• Develop and manage formularies
• Contract with pharmacy networks
• Manage mail-order pharmacy programs
• Implement step therapy and PA requirements
Major PBMs: Express Scripts, CVS Caremark, OptumRx
Key Terms – Government & Special Programs
• Medicare Part B – Clinic/office-administered drugs; billed as medical claim
• Medicare Part D – Outpatient pharmacy drugs; billed as pharmacy claim
• Medicaid – Joint federal/state program for low-income individuals
• Dual eligible – Patient with both Medicare and Medicaid
• PBM – Pharmacy Benefit Manager; third-party administrator
• Medicaid Drug Rebate Program – Manufacturer rebates to reduce government drug costs
⚠️ Watch Out For
• Part B vs. Part D is a high-frequency exam topic. Know which drugs go under which part.
• The Medicaid rebate program reduces costs to the government, not to the pharmacy — this distinction appears on exams.
• PBMs work on behalf of insurers and employers, not the pharmacy or the patient.
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Quick Review Checklist
Use this checklist to confirm you understand all essential concepts before your exam:
Claim Submission
• [ ] I know the NCPDP D.0 is the standard electronic claim format
• [ ] I can explain the purpose of BIN, PCN, and Group Number
• [ ] I understand COB and the primary/secondary billing order
• [ ] I can distinguish between a reject (fixable error) and a denial (coverage refusal)
Reimbursement & Pricing
• [ ] I know the reimbursement formula: ingredient cost + dispensing fee ≤ U&C
• [ ] I understand AWP is a benchmark, not the actual acquisition cost
• [ ] I know MAC lists set price ceilings for generics
• [ ] I understand the U&C rule: insurance pays the lower of calculated reimbursement or cash price
Plan & Coverage Terms
• [ ] I can explain formulary tiers and how they affect copays
• [ ] I understand prior authorization requirements and the technician's role
• [ ] I can define step therapy and why it's used
• [ ] I know the difference between deductible, copay, and coinsurance
• [ ] I understand the Medicare Part D donut hole/coverage gap
Adjudication & Rejection Codes
• [ ] I know rejection code 75 = prior authorization required
• [ ] I can calculate/explain the "refill too soon" window (75–80% days supply)
• [ ] I know how to handle an "NDC Not Covered" rejection
• [ ] I know technicians notify pharmacists — they do not resolve clinical issues directly
Government & Special Programs
• [ ] I can differentiate Medicare Part B (clinical/medical) from Part D (pharmacy)
• [ ] I know all four Medicare parts (A, B, C, D) and what each covers
• [ ] I understand the Medicaid Drug Rebate Program reduces government costs, not pharmacy reimbursement
• [ ] I can explain the PBM's role as a third-party administrator
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Review these concepts regularly, practice with sample rejection scenarios, and focus especially on the reject vs. denial distinction and Part B vs. Part D differences — these are consistently tested on the PTCB exam.