By Daniel Plasencia — Certified Risk Coder (CRC), Certified Professional Coder (CPC)

Quick Answer

HCC Buddy's free tier gives you 10 ICD-10 lookups per day with full HCC mapping (V24 and V28), plus unlimited access to the NPI lookup, drug reference, and RAF calculator. No credit card required, no trial expiration — the free tier is permanent. Compared to other free options (ICD10Data, ICDcodes.ai, MedCode Pro), HCC Buddy is the only free tool that shows HCC mapping on every code lookup and includes a RAF calculator. If you need more than 10 lookups per day, Pro is $29.99/month with unlimited lookups and the Chrome extension.

Why Free HCC Coding Tools Matter

Not every coder needs a $500/year subscription. Students learning HCC coding need practice tools. Part-time coders processing 5 to 10 charts per day need something functional without a monthly bill. Coders evaluating whether to recommend a tool to their team need to try before they buy. And coders paying out of pocket — which is more common than the industry admits — need to know what they can get for free before committing their own money.

The market for free HCC coding tools is small but growing. Here is what is available, what each tool actually provides, and where the limitations are.

HCC Buddy Free Tier: What Is Included

10 ICD-10 Lookups Per Day

Every day, you get 10 searches in the ICD-10 Encoder. Each search returns:

Full code details — Description, billable status, code hierarchy, chapter/section placement

V28 HCC mapping — Which HCC category (if any) the code maps to under the current V28 model

V24 HCC mapping — The legacy V24 mapping for comparison and transition-period awareness

RAF coefficient — The exact weight each HCC carries in the risk adjustment formula

Hierarchy information — Where the HCC sits in the hierarchy and which other HCCs it interacts with

Ten lookups per day is enough for:

Students and trainees practicing HCC coding

Coders who need occasional verification of codes they mostly know by heart

CDI specialists who review 3 to 5 charts per day and need to verify HCC impact for specific codes

Anyone evaluating HCC Buddy before committing to Pro

Unlimited NPI Lookup

The NPI Lookup tool is fully available on the free tier with no daily limit. You can:

Search for any provider by name, NPI number, or specialty

View provider credentials, practice location, and taxonomy codes

Verify that the rendering provider on a claim is a qualifying provider type for risk adjustment

NPI lookup is used daily by coders who need to verify that an encounter was with a provider type eligible for risk adjustment data submission. Not all provider types qualify — knowing which ones do is essential for determining whether an encounter's diagnoses can be used for HCC capture.

Unlimited Drug Reference

The Drug Reference tool is fully available on the free tier with no daily limit. You can:

Search any medication by brand or generic name

See the ICD-10 codes commonly associated with each medication

Identify potential missed diagnoses by cross-referencing a patient's medication list against their coded diagnoses

The drug-to-diagnosis cross-reference is one of the most effective methods for catching missed HCCs. A patient on metformin, lisinopril, and gabapentin who is only coded for diabetes and hypertension is likely missing a neuropathy diagnosis. The drug reference surfaces these connections.

Unlimited RAF Calculator

The RAF Calculator is fully available on the free tier with no daily limit. You can:

Enter patient demographics (age, sex, eligibility category)

Add HCC codes to build a risk profile

See the calculated RAF score with individual HCC contributions

Model the impact of adding or removing specific HCCs

Compare V24 and V28 scores side by side

The RAF calculator is essential for understanding the financial impact of coding decisions. Adding HCC 155 (depression, moderate) to a patient profile changes the RAF score by a specific coefficient — the calculator shows you exactly how much.

How HCC Buddy Free Compares to Other Free Tools

ICD10Data.com (Free)

What it provides: ICD-10 code lookup with descriptions, hierarchy navigation, and code details. Well-indexed by Google. Clean, fast interface.

What it does NOT provide: HCC mapping, RAF coefficients, drug reference, NPI lookup, or RAF calculator. ICD10Data is an ICD-10 reference tool, not an HCC coding tool.

Best for: General ICD-10 code lookups when you need a description or hierarchy reference. Not useful for risk adjustment work.

ICDcodes.ai (Free)

What it provides: AI-powered ICD-10 code search with natural language queries. Some HCC mapping data on select codes. Modern interface.

What it does NOT provide: Comprehensive HCC mapping on every code, RAF calculator, drug reference, NPI lookup, or Chrome extension. The AI search is useful for exploration but can occasionally return inaccurate results for specific coding queries.

Best for: Exploring codes using natural language ("heart failure reduced ejection fraction"). Not recommended as a primary production tool.

MedCode Pro (Free)

What it provides: ICD-10 code lookup with partial HCC mapping information. Basic search and browse functionality.

What it does NOT provide: RAF calculator, drug reference, NPI lookup, Chrome extension, or guaranteed data freshness for V28 mappings. The HCC data may lag behind CMS updates.

Best for: Quick code lookups when you need some HCC context. Limited for comprehensive risk adjustment work.

Comparison Table

What the Free Tier Does NOT Include

To be transparent about the limitations:

10 lookup limit per day — If you process 20+ charts per day, you will hit this limit by mid-morning. Pro ($29.99/month) removes the limit entirely.

No Chrome extension access — The Chrome extension that provides in-EHR coding requires a Pro subscription. Free users access the tools through the website.

No team features — The free tier is for individual use. Team pricing and multi-user management require a paid plan.

Who Should Use the Free Tier vs. Upgrade to Pro

Stay on Free If:

You are a student or trainee learning HCC coding and need practice with a real tool

You process fewer than 10 charts per day and the daily lookup limit is sufficient

You primarily use the RAF calculator and drug reference (which are unlimited) and only occasionally need code lookups

You are evaluating HCC Buddy before recommending it to your team

Upgrade to Pro ($29.99/month) If:

You process 10 or more charts per day and need unlimited lookups

You want the Chrome extension for in-EHR coding (this is the biggest Pro advantage — it eliminates tab-switching)

You work in a high-volume risk adjustment setting where speed matters

You need the tool available all day without worrying about hitting a daily limit

How to Get Started With the Free Tier

1. Go to hccbuddy.com/signup and create an account

2. No credit card required — the free tier activates immediately

3. Start using the ICD-10 Encoder (10 lookups/day), Drug Reference (unlimited), NPI Lookup (unlimited), and RAF Calculator (unlimited)

4. If you decide to upgrade, Pro starts at $29.99/month and unlocks unlimited lookups plus the Chrome extension

The free tier does not expire. There is no 14-day trial period for the free features — they are permanently available at zero cost. This is not a freemium bait-and-switch. The free tier is a real product designed to be genuinely useful at the free level while giving coders a reason to upgrade when their volume justifies it.

The Bottom Line

If you do any HCC coding work — even occasionally — having a tool that shows HCC mapping on every ICD-10 code lookup is materially better than using a tool that does not. The free tier of HCC Buddy provides that, plus a RAF calculator, drug reference, and NPI lookup that the other free tools do not offer.

The question is not whether to use a free HCC coding tool. The question is which one. For risk adjustment work specifically, HCC Buddy's free tier provides more HCC-relevant functionality than any other free option available.

Create your free account now — no credit card, no trial expiration, no strings.

Free HCC Coding Tool: What You Get Without Paying a Dime