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Aethera learning library / Anatomy & coding

The 3D anatomy atlas.

Explore eight guided regional studies with adjustable transparency, surrounding anatomy and surface cutaways. Connect anatomical structures with the documentation questions that matter in medical billing.

U.S. billing education · Source review: · Selected examples, not a claim-coding tool

01 / Explore the anatomy

Find the structure. Understand the context.

Go to coding lessons ↓
Preparing the interactive anatomy viewer…
Layers, transparency & cutaway

These controls refine the region and layer selected in the side panel. Context shows neighboring structures faintly around a selected structure.

Visibility and opacity

Regional study notes

Whole body

Start with anatomical position. Left and right always refer to the patient, even when the model rotates. Anatomy supplies context; the documented service determines the code.

  • 01Identify the body region and the precise structure.
  • 02Separate the diagnosis from the service performed.
  • 03Check the current code set, payer rules and date of service.
Study the anatomy reference ↗

02 / Connect anatomy and documentation

40 specialty learning paths

Explore common documentation questions across medical, surgical, dental and therapy services. The 27 selected examples include individual codes, code families and modifiers. They are a starting point for study, not comprehensive specialty code lists.

NCCI references open the official CMS manual page. Choose the 2026 complete manual to use the PDF page numbers shown below, or select the relevant chapter. If your network blocks CMS, try the Cloudflare document reader. CMS may also restrict that route.

27 coding examples shown

CPT · educational example

58571

Laparoscopic total hysterectomy with adnexal removal

This example includes a uterus weighing 250 g or less and removal of tube(s) and/or ovary(s). Verify all descriptor elements. Female anatomy is not shown in this model.

Read the supporting CMS reference ↗ for 58571

CPT · educational example

31575

Diagnostic flexible laryngoscopy

Document the completed examination. Do not use the diagnostic example as a substitute for a therapeutic procedure descriptor.

Read the supporting CMS reference ↗ for 31575

CDT · educational example

D0120

Periodic oral evaluation for an established patient

Use the current CDT entry and dental documentation. A medical CPT example does not replace a dental code or determine dental-plan coverage.

Read the supporting ADA reference ↗ for D0120

CPT · educational example

11042

Subcutaneous-tissue debridement

The base example covers the first 20 cm² or less. Verify the tissue actually removed and area; wound depth alone is insufficient.

Read the supporting CMS reference ↗ for 11042

CPT · educational example

11043

Muscle or fascia debridement

The base example covers the first 20 cm² or less. Document removal of muscle or fascia; exposed tissue alone does not establish removal.

Read the supporting CMS reference ↗ for 11043

CPT · educational example

99213

Established-patient office/outpatient E/M example

Review medical decision making or eligible total time and the applicable service requirements; a diagnosis or organ does not select the level.

Read the supporting CMS reference ↗ for 99213

HCPCS modifier · educational example

JW / JZ

Selected single-dose drug reporting modifiers

Review the drug, payment setting, container, administration and discarded amount. These are not procedure codes or automatic instructions for every drug.

Read the supporting CMS reference ↗ for JW / JZ

Use the full, current licensed code set and payer instructions for the date of service. CPT examples concern services, CDT concerns dental procedures, and JW/JZ are modifiers. Diagnosis coding requires a separate ICD-10-CM review. Neither model selection nor these examples establishes medical necessity, separate reportability, coverage or payment.

Follow the revenue cycle

Use these checkpoints with the regional and specialty lessons. Anatomical recognition is one part of the documentation review.

  1. 1. Before the service

    Identify the payer, benefit, setting, referral and authorization requirements. Authorization and eligibility are separate checks; neither establishes a final payment amount.

  2. 2. Read the clinical record

    Identify the documented diagnosis, precise site, laterality, completed service, approach and extent. Resolve missing facts rather than inferring them from the model.

  3. 3. Review coding and edits

    Use the code system and release applicable to the date of service. Check descriptor requirements, instructions, modifiers and setting-specific edits.

  4. 4. Prepare and track the claim

    Distinguish professional, facility and dental reporting. Check required claim fields and track acceptance separately from adjudication.

  5. 5. Interpret the remittance

    Read adjustment group, reason and remark information together. Separate contractual adjustments, patient responsibility and denials using the actual remittance and applicable rules.

  6. 6. Resolve and learn

    Determine whether correction, additional documentation, reconsideration or appeal is appropriate. Verify payer-specific filing requirements and record the reason for any change.

Coding library coverage

This atlas provides selected educational examples and official references. Complete code catalogues and automated claim validation are not included. Code releases, effective dates, setting and payer rules must be checked separately; comprehensive CPT and CDT website content requires appropriate licensing.

03 / Check your understanding

Three questions before you code

1. The model is rotated. Whose right and left determine laterality?
2. A wound extends to bone. What establishes the debridement code?
3. Does selecting a shoulder on the atlas establish that 29827 can be billed?

Sources, model scope & reuse

Anatomical model

Regional coverage reference: Rohen, Yokochi and Lütjen-Drecoll, Color Atlas of Anatomy: A Photographic Study of the Human Body, 7th edition (2011). The reference informed topic organization; no textbook photographs, scans or textures are reproduced. Study prompts are original. This is not a digital edition of that book.

BodyParts3D, © The Database Center for Life Science licensed under CC Attribution 4.0 International. The model uses selected meshes from the publisher’s PART-OF 4.0 reduced OBJ dataset. Names and anatomical identifiers follow the source tables.

Adaptations include grouped structures, coordinate/unit conversion, calculated surface normals, display colors and Draco compression. The model preserves the source arrangement; it is not a patient scan, measurement tool, surgical simulator or diagnostic reference. Rotation animates the view, not organ physiology. Cutaways clip existing surfaces and may expose hollow geometry; they do not reproduce validated tissue sections or CT/MRI.

This adult male reference does not include female reproductive anatomy, pediatric variants, the spinal cord, a complete muscular system or the full vessel and peripheral nerve trees. Specialty lessons can cover structures not rendered here. Use the linked anatomy textbook for additional study.

Billing education

Selected coding summaries were checked against the linked CMS and ADA sources. NCCI references use the 2026 Medicare policy manual. These summaries do not reproduce complete code descriptors, edits, coverage criteria or specialty curricula. Source review is not independent clinical certification or accredited continuing education.

Verify the current code-set version, date of service, setting, documentation, edits and payer policy before applying a rule. Commercial and Medicaid rules can differ from Medicare. CPT is a registered trademark of the American Medical Association. CDT is a trademark of the American Dental Association; respective code-set rights remain with their owners.

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