Crystal's MCW Coder Hub🩺 CPT Code 13101 - Repair, Complex, Trunk; 2.6 cm to 7.5 cm
📋 Code Description
Repair, complex, trunk; 2.6 cm to 7.5 cm
CPT 13101 describes the complex repair of a wound located on the trunk measuring between 2.6 cm and 7.5 cm in total length. This code sits in the middle tier of the complex trunk repair family — above 13100 (1.1-2.5 cm) and extended by +13102 for each additional 1.1-2.5 cm beyond 7.5 cm.
Complex repair represents the highest level of wound closure complexity in the CPT integumentary repair section and requires one or more of the following techniques in addition to layered closure:
- Scar revision (excision and freshening of wound edges)
- Debridement of devitalized, contaminated, or necrotic tissue
- Extensive undermining of skin and subcutaneous tissue from underlying fascia
- Stents or bolsters used to reduce wound tension
- Retention sutures placed to reinforce or supplement primary closure
Important
The distinguishing factor between complex and intermediate repair is technique and wound characteristics, not merely the depth of closure layers. A wound requiring only layered closure — even with deep subcutaneous sutures — does not meet the threshold for complex repair coding.
🗂️ Code Type & Classification
| Field | Detail |
|---|---|
| CPT Code | 13101 |
| Code Type | Category I CPT |
| Section | Surgery - Integumentary System |
| Subsection | Repair (Closure) |
| Repair Type | Complex |
| Anatomic Site | Trunk |
| Size Range | 2.6 cm - 7.5 cm |
| Global Period | 90 days |
| wRVU | 5.09 |
| Assistant Payable | ❌ No (generally not covered) |
| Bilateral | ❌ Not applicable |
| Add-On Code | ❌ No (see +13102 for extension) |
| Co-Surgeon | ❌ Not applicable |
| Team Surgery | ❌ Not applicable |
| Facility / Non-Facility | Both settings applicable |
🧭 Anatomic Site — “Trunk” Defined
For complex repair coding purposes, the trunk includes the following body regions:
- Anterior thorax (chest wall)
- Posterior thorax (back/thoracic spine region)
- Abdomen (all quadrants, including flanks and lateral walls)
- Perineum
- External genitalia
- Buttocks
- Lumbar/sacral back
⚠️ Critical Distinction: The neck, axillae, hands, and feet are not included in trunk for complex repair. Wounds at those locations are coded with 13131-13133.
Scalp, arms, and legs belong to the 13120-+13122 family.
Eyelids, nose, ears, and lips belong to 13150-+13153.
🔬 What Qualifies as a “Complex” Repair?
The complexity of the repair must be documented explicitly in the operative or procedure note. At least one of the following elements must be present and clearly described:
| Element | Clinical Examples / Documentation Language |
|---|---|
| Scar revision | ”Scar excised and wound edges debrided prior to layered closure”; hypertrophic scar resection |
| Debridement | ”Devitalized tissue removed from wound margins”; traumatic laceration with contaminated tissue |
| Extensive undermining | ”Skin and subcutaneous tissue widely undermined bilaterally to allow tension-free approximation” |
| Stents / bolsters | ”Bolster sutures placed over wound to distribute tension”; stenting with foam or rubber tubing |
| Retention sutures | ”Heavy #1 PDS retention sutures placed through all layers to support closure” |
📝 Documentation Warning: A layered closure (e.g., deep absorbable sutures + running subcuticular) is classified as intermediate repair, not complex. Complex repair requires additional work beyond what layered closure alone entails. Auditors specifically look for these qualifying elements. Missing documentation is the most common reason for downcoding complex to intermediate on claim review.
📐 Wound Measurement & Length Aggregation Rules
- Wound length is measured in centimeters (cm)
- When multiple wounds are repaired under the same complexity level (complex) and same anatomic site (trunk), their lengths are added together and reported as a single code
- Wounds of different complexity levels (e.g., one simple + one complex) are not combined — they are reported under separate codes
- Wounds in different anatomic categories (e.g., one trunk + one arm) are not combined — each is reported separately with the appropriate site-specific code
Length Aggregation Example:
Three complex wounds on the abdomen: 2.0 cm + 1.8 cm + 1.5 cm = 5.3 cm total
→ Report: 13101 (2.6-7.5 cm) ✅
Do not report three separate 13100 codes.
💊 wRVU & Reimbursement Summary
| Component | Value |
|---|---|
| Work RVU (wRVU) | 5.09 |
| Global Period | 90 days |
| Pre-Operative Period | 1 day |
| Post-Operative Care | Included in global (routine wound checks) |
| Assistant at Surgery | ❌ Generally not payable |
| Co-Surgeon | ❌ Not applicable |
| Team Surgery | ❌ Not applicable |
| Facility vs. Non-Facility | Higher RVU reimbursement in non-facility (office/clinic) setting under MPFS |
💡 The wRVU for 13101 (5.09) is significantly higher than 13100 (3.15), reflecting the greater wound size and operative complexity. When +13102 is appended for wounds exceeding 7.5 cm, each add-on unit carries an additional 1.59 wRVU.
⚠️ Assistant surgeon billing with modifier 80, 81, or 82 is generally not payable by Medicare for this code. Always verify individual payer contracts.
➕ Add-On Code: +13102
When the total complex trunk repair exceeds 7.5 cm, +13102 is appended for each additional 1.1-2.5 cm segment beyond 13101.
| Code | Description | wRVU |
|---|---|---|
| 13100 | Complex, trunk — 1.1 to 2.5 cm | 3.15 |
| 13101 | Complex, trunk — 2.6 to 7.5 cm ✅ (This code) | 5.09 |
| +13102 | Complex, trunk — each additional 1.1-2.5 cm (add-on to 13101) | 1.59 |
Extended Repair Calculation Example:
Total wound length: 11.8 cm
Step 1: 13101 covers the first 2.6-7.5 cm
Step 2: Remaining length = 11.8 − 7.5 = 4.3 cm still to report
Step 3: +13102 × 1 covers 1.1-2.5 cm → 4.3 − 2.5 = 1.8 cm remaining
Step 4: +13102 × 2 covers another 1.1-2.5 cm → 1.8 cm falls within this range
Final Billing: 13101 + +13102 × 2
⚠️ +13102 cannot be reported alone — it requires 13100 or 13101 as the primary code on the same claim.
📊 Code Tree — Repair (Closure) Full Overview
### 🔹 Simple Repair — Scalp / Neck / Axillae / Extremities / Trunk
[[12001]] - 2.5 cm or less
[[12002]] - 2.6-7.5 cm
[[12004]] - 7.6-12.5 cm
[[12005]] - 12.6-20.0 cm
[[12006]] - 20.1-30.0 cm
[[12007]] - over 30.0 cm
### 🔹 Simple Repair — Face / Ears / Eyelids / Nose / Lips / Mucous Membranes
[[12011]] - 2.5 cm or less
[[12013]] - 2.6-5.0 cm
[[12014]] - 5.1-7.5 cm
[[12015]] - 7.6-12.5 cm
[[12016]] - 12.6-20.0 cm
[[12017]] - 20.1-30.0 cm
[[12018]] - over 30.0 cm
[[12020]] - Treatment of superficial wound dehiscence, simple closure
[[12021]] - Treatment of superficial wound dehiscence, packing
### 🔹 Intermediate Repair — Scalp / Axillae / Trunk / Extremities
[[12031]] - 2.5 cm or less
[[12032]] - 2.6-7.5 cm
[[12034]] - 7.6-12.5 cm
[[12035]] - 12.6-20.0 cm
[[12036]] - 20.1-30.0 cm
[[12037]] - over 30.0 cm
### 🔹 Intermediate Repair — Face / Ears / Eyelids / Nose / Lips / Mucous Membranes
[[12041]] - 2.5 cm or less
[[12042]] - 2.6-7.5 cm
[[12044]] - 7.6-12.5 cm
[[12045]] - 12.6-20.0 cm
[[12046]] - 20.1-30.0 cm
[[12047]] - over 30.0 cm
### 🔶 Complex Repair — Trunk ⬅️ YOU ARE HERE
[[13100]] - Complex, trunk; 1.1-2.5 cm
**[[13101]]** - Complex, trunk; **2.6-7.5 cm** ✅
[[+13102]] - Complex, trunk; each additional 1.1-2.5 cm (add-on)
### 🔶 Complex Repair — Scalp / Arms / Legs
[[13120]] - Complex, scalp/arms/legs; 1.1-2.5 cm
[[13121]] - Complex, scalp/arms/legs; 2.6-7.5 cm
[[+13122]] - Complex, scalp/arms/legs; each additional 1.1-2.5 cm (add-on)
### 🔶 Complex Repair — Forehead / Cheeks / Chin / Mouth / Neck / Axillae / Genitalia / Hands / Feet
[[13131]] - 1.1-2.5 cm
[[13132]] - 2.6-7.5 cm
[[+13133]] - each additional 1.1-2.5 cm (add-on)
### 🔶 Complex Repair — Eyelids / Nose / Ears / Lips
[[13150]] - 1.0 cm or less
[[13151]] - 1.1-2.5 cm
[[13152]] - 2.6-7.5 cm
[[+13153]] - each additional 1.1-2.5 cm (add-on)
✅ Includes
- Complex wound closure requiring more than layered closure alone
- Scar revision with complex re-approximation of wound edges
- Debridement of traumatic, contaminated, or devitalized tissue when performed as part of the closure
- Extensive skin and subcutaneous undermining to achieve tension-free closure
- Placement of stents, bolsters, or retention sutures
- All suture materials used (absorbable and non-absorbable, all layers)
- Local anesthesia administration by the operating physician
- Wound irrigation and lavage performed at time of repair
- Electrocautery or simple ligation of small bleeding vessels during the repair
- Wound edge freshening and debridement integral to the closure technique
- Application of adhesive strips or glue in addition to sutures (when part of the same repair)
❌ Excludes / Do Not Report Separately
| Excluded Code / Scenario | Reasoning / Correct Action |
|---|---|
| 12001-12021 (Simple repair) | Do not report simple repair if the wound required complex technique |
| 12031-12057 (Intermediate repair) | Layered closure alone = intermediate; complex requires additional documented technique |
| 97597 / 97598 (Active wound care) | Debridement bundled into complex repair when performed as part of the closure |
| 11042-11047 (Surgical debridement) | Bundled when debridement is integral to the complex repair encounter |
| 13100 (same encounter, same site) | Do not report 13100 and 13101 together for wounds that must be combined by length |
| Skin grafts 15100-15278 | When the defect requires grafting, graft codes replace repair codes entirely |
| Flap closures 15570-15738 | Pedicle/rotational flap codes replace repair codes when flap technique is used |
| Wound closure strips only | Steri-strip or tape closure is not separately reportable as a repair procedure |
| Closure integral to primary surgery | Do not bill repair codes for wound closure that is inherent to a larger procedure (e.g., closing a laparotomy incision) |
🔁 Common Modifiers Used With 13101
| Modifier | Description & Use |
|---|---|
| 51 | Multiple procedures — append to the secondary procedure when 13101 is performed with another surgery in the same session |
| 59 | Distinct procedural service — use when payer incorrectly bundles 13101 with another procedure; documents separate wound/encounter |
| XS | Separate structure — NCCI-preferred alternative to 59 when applicable |
| 79 | Unrelated procedure during postoperative period — use when 13101 is performed during the global period of a prior, unrelated surgery |
| 78 | Return to OR for treatment of complication — use when re-repair is performed in the OR during an existing global period |
| 58 | Staged or related procedure during the postoperative period — when wound revision is planned as part of staged care |
| 24 | Unrelated E/M during postoperative period — for E/M visits unrelated to the surgical wound |
| 80 | Assistant surgeon — verify payer policy; Medicare generally does not cover assistant surgeon for this code |
| RT / LT | Right / Left — may be required by some payers for lateralized trunk wounds (e.g., right vs. left flank) |
| 52 | Reduced services — rarely applicable; only when the procedure is significantly less than described |
🏥 MS-DRG Considerations (Inpatient Setting)
⚠️ In the inpatient hospital setting, CPT codes are not used for claim submission. Procedures are reported using ICD-10-PCS. However, for inpatient coders, understanding the equivalent ICD-10-PCS logic and the resulting DRG impact is critical.
ICD-10-PCS Equivalent Logic for Complex Trunk Repair (Inpatient)
| PCS Character | Value |
|---|---|
| Section | 0 - Medical and Surgical |
| Body System | H - Skin and Breast |
| Root Operation | Q - Repair |
| Body Part | Varies by trunk sub-location (e.g., Skin, Chest = 0HQ5XZZ; Skin, Abdomen = 0HQ7XZZ; Skin, Back = 0HQ6XZZ) |
| Approach | X - External |
| Device | Z - No Device |
| Qualifier | Z - No Qualifier |
MS-DRG Impact
Complex skin and soft tissue repairs of the trunk performed in the inpatient setting may affect DRG assignment depending on the principal diagnosis, CC/MCC burden, and whether the repair qualifies as an OR procedure under CMS definitions.
| MS-DRG | Description | Type |
|---|---|---|
| 573 | Skin Graft &/or Debridement w MCC | Surgical |
| 574 | Skin Graft &/or Debridement w CC | Surgical |
| 575 | Skin Graft &/or Debridement w/o CC/MCC | Surgical |
| 579 | Other Skin, Subcut Tis & Breast Proc w MCC | Surgical |
| 580 | Other Skin, Subcut Tis & Breast Proc w CC | Surgical |
| 581 | Other Skin, Subcut Tis & Breast Proc w/o CC/MCC | Surgical |
| 602 | Cellulitis w MCC | Medical |
| 603 | Cellulitis w/o MCC | Medical |
📌 DRG assignment is ultimately driven by:
- Principal diagnosis (reason for admission after workup)
- ICD-10-PCS procedure code (OR vs. non-OR)
- CC/MCC status (comorbidities and complications) Always validate through your facility’s grouper software. Do not rely solely on CPT crosswalks for inpatient DRG determination.
🧾 Common ICD-10-CM Diagnosis Codes Used With 13101
HCC = Hierarchical Condition Category. Traumatic laceration codes generally do not carry HCC risk-adjustment weight. Chronic wound etiologies, pressure injuries, and underlying systemic disease codes may carry HCC flags.
🔸 Traumatic Lacerations — Trunk
| ICD-10-CM Code | Description | HCC |
|---|---|---|
| S21.001A | Unsp open wound, right front thorax wall w/o penetration into thoracic cavity, init | ❌ |
| S21.002A | Unsp open wound, left front thorax wall w/o penetration into thoracic cavity, init | ❌ |
| S21.011A | Laceration w/o foreign body, right front thorax wall, init | ❌ |
| S21.012A | Laceration w/o foreign body, left front thorax wall, init | ❌ |
| S21.021A | Laceration w/ foreign body, right front thorax wall, init | ❌ |
| S21.101A | Unsp open wound, right back thorax wall w/o penetration into thoracic cavity, init | ❌ |
| S21.111A | Laceration w/o foreign body, right back thorax wall, init | ❌ |
| S21.112A | Laceration w/o foreign body, left back thorax wall, init | ❌ |
| S31.000A | Unsp open wound of lower back and pelvis w/o retroperitoneal penetration, init | ❌ |
| S31.010A | Laceration w/o foreign body, lower back and pelvis, init | ❌ |
| S31.100A | Unsp open wound of abdominal wall, RUQ w/o penetration into peritoneal cavity, init | ❌ |
| S31.119A | Laceration w/o foreign body, abdominal wall, unspecified quadrant, init | ❌ |
| S31.129A | Laceration w/ foreign body, abdominal wall, unspecified quadrant, init | ❌ |
| S31.819A | Open wound of unspecified buttock, init | ❌ |
| S31.821A | Laceration w/o foreign body of right buttock, init | ❌ |
| S31.822A | Laceration w/o foreign body of left buttock, init | ❌ |
🔸 Chronic Wounds & Pressure Injuries — Trunk / Buttock
| ICD-10-CM Code | Description | HCC |
|---|---|---|
| L89.100 | Pressure ulcer of unspecified part of back, unstageable | ✅ HCC 161 |
| L89.130 | Pressure ulcer of right lower back, unstageable | ✅ HCC 161 |
| L89.140 | Pressure ulcer of left lower back, unstageable | ✅ HCC 161 |
| L89.150 | Pressure ulcer of sacral region, unstageable | ✅ HCC 161 |
| L89.310 | Pressure ulcer of right buttock, unstageable | ✅ HCC 161 |
| L89.320 | Pressure ulcer of left buttock, unstageable | ✅ HCC 161 |
| L97.411 | Non-pressure chronic ulcer of right buttock limited to breakdown of skin | ✅ HCC 161 |
| L97.419 | Non-pressure chronic ulcer of right buttock, unspecified severity | ✅ HCC 161 |
🔸 Scar / Wound Conditions
| ICD-10-CM Code | Description | HCC |
|---|---|---|
| L91.0 | Hypertrophic scar | ❌ |
| L90.5 | Scar conditions and fibrosis of skin | ❌ |
| L76.31 | Accidental puncture and laceration of skin and subcutaneous tissue during a procedure | ❌ |
| T81.31XA | Disruption of external operation (surgical) wound, NEC, initial encounter | ❌ |
| T81.32XA | Disruption of internal operation (surgical) wound, NEC, initial encounter | ❌ |
| T79.3XXA | Post-traumatic wound infection, initial encounter | ❌ |
🔸 Underlying Systemic Conditions Affecting Wound Healing
| ICD-10-CM Code | Description | HCC |
|---|---|---|
| E11.621 | Type 2 DM with foot ulcer (document if DM complicates healing) | ✅ HCC 18 |
| E11.628 | Type 2 DM with other skin ulcer | ✅ HCC 18 |
| E10.621 | Type 1 DM with foot ulcer | ✅ HCC 18 |
| L97.519 | Non-pressure chronic ulcer of other part of right foot, unspecified severity | ✅ HCC 161 |
| I70.231 | Atherosclerosis of native arteries of right leg with ulceration of thigh | ✅ HCC 107 |
| D57.1 | Sickle-cell disease without crisis — may complicate wound healing | ✅ HCC 46 |
📌 7th Character Reminder for Trauma Codes:
- A = Initial encounter (active/definitive treatment phase)
- D = Subsequent encounter (routine healing, follow-up)
- S = Sequela (late effect of injury)
When the patient is receiving active treatment for the wound, use 7th character A, even if it is not the patient’s first visit to the office.
💡 Coding Examples
Example 1 — Large Traumatic Laceration with Extensive Undermining
Clinical Scenario:
A 42-year-old male presents to the ED after a motorcycle accident. He has a 6.8 cm jagged laceration across the right lateral abdominal wall. The wound edges are irregular with devitalized tissue. The surgeon debrides the devitalized margins, performs extensive bilateral undermining of the subcutaneous tissue to relieve tension, and closes the wound in layers.
Correct Coding:
- 13101 — Complex repair, trunk, 6.8 cm
- S31.119A — Laceration w/o foreign body, abdominal wall, unspecified quadrant, init
- V29.9XXA — Motorcycle rider injured in unspecified traffic accident, init
✅ Complex repair is justified by debridement of devitalized tissue and extensive undermining. The wound at 6.8 cm falls squarely in the 13101 range (2.6-7.5 cm).
Example 2 — Scar Revision, Back
Clinical Scenario:
A 35-year-old female presents for elective scar revision on the lower back. A 5.2 cm hypertrophic scar from a prior surgery is excised. The wound edges are freshened, and extensive undermining is performed superior and inferior to allow a tension-free layered closure. Retention sutures are placed.
Correct Coding:
✅ Three complex repair qualifying elements are present: scar revision, extensive undermining, and retention sutures.
Example 3 — Multiple Wounds Aggregated, Same Site
Clinical Scenario:
A patient sustains multiple lacerations across the abdomen and chest during a workplace accident. The surgeon performs complex closures of the following wounds on the trunk:
- Anterior chest: 2.5 cm complex laceration
- Right flank: 1.8 cm complex laceration
- Lower abdomen: 1.5 cm complex laceration
Total combined length: 2.5 + 1.8 + 1.5 = 5.8 cm
Correct Coding:
- 13101 — Complex repair, trunk, 5.8 cm (combined)
- S21.011A — Laceration w/o foreign body, right front thorax wall, init
- S31.119A — Laceration w/o foreign body, abdominal wall, unspecified quadrant, init
✅ All three wounds are complex and all are on the trunk, so lengths are aggregated. One code is reported for the total combined length.
Example 4 — Complex Trunk Repair Exceeding 7.5 cm (With Add-On)
Clinical Scenario:
A patient requires complex repair of a 10.5 cm traumatic laceration across the back following a fall from a ladder. Extensive undermining and retention sutures are required.
Length calculation:
- 13101 covers 2.6-7.5 cm
- Remaining: 10.5 − 7.5 = 3.0 cm additional
- +13102 × 1 covers 1.1-2.5 cm → still 0.5 cm beyond
- +13102 × 2 covers the final segment (0.5 cm falls within the 1.1-2.5 cm add-on tier)
Correct Coding:
- 13101 — Complex, trunk, primary code
- +13102 × 2 — Each additional 1.1-2.5 cm (two units)
- S21.111A — Laceration w/o foreign body, right back thorax wall, init
✅ +13102 cannot stand alone — it always requires 13100 or 13101 as the base code.
Example 5 — Complex Trunk + Complex Arm (Same Session)
Clinical Scenario:
During the same ED visit, a physician performs a complex repair of a 3.2 cm abdominal wound and a complex repair of a 2.0 cm wound on the forearm. Both required extensive undermining.
Correct Coding:
- 13101 — Complex, trunk, 3.2 cm
- 13120 - 51 — Complex, arms, 2.0 cm (different anatomic site, modifier 51 for secondary procedure)
- S31.119A — Laceration, abdominal wall, init
- S51.819A — Open wound of unspecified forearm, init
✅ Different anatomic categories are billed separately. Modifier 51 appended to the lower-valued procedure.
Example 6 — Complex Repair Should NOT Be Reported
Clinical Scenario:
A 55-year-old patient undergoes elective abdominal hernia repair (49560). At the end of the case, the surgeon closes the abdominal incision in layers with absorbable subcutaneous sutures and subcuticular skin closure.
Incorrect Coding:
Correct Coding:
- 49560 only — wound closure is integral to and bundled within the primary hernia repair procedure
❌ Wound closure that is inherent to a primary surgical procedure is not separately reportable. Complex repair codes apply to separate, distinct wounds — not incision closure for the primary operative approach.
⚠️ Common Coding Pitfalls
- Upcoding intermediate to complex: The most frequently audited error in wound repair coding. Document the specific technique that justifies complex repair — “layered closure” is intermediate, not complex.
- Failing to aggregate wound lengths: Billing multiple 13100 codes instead of combining lengths to reach 13101 is an NCCI violation and triggers overpayment flags.
- Separate debridement billing: 11042-11047 and 97597/97598 are bundled into complex repair when performed as part of the same closure at the same encounter and same wound.
- Reporting 13101 and 13100 for the same wound: Only one code in the trunk complex repair family applies per wound group. Lengths are combined and a single code selected.
- Using CPT codes for inpatient claims: In the inpatient setting, ICD-10-PCS is required for all procedure reporting. CPT is for outpatient/professional fee billing only.
- Missing 7th character on trauma diagnoses: Failing to apply the correct encounter-based character (A/D/S) on injury codes results in claim rejection or incorrect specificity.
- Ignoring the 90-day global period: Routine wound checks, suture removal, and minor wound care within 90 days post-repair are bundled. Separate E/M or wound care charges require modifier 24 (unrelated E/M) or 79 (unrelated procedure) with supporting documentation.
🔗 Related Codes Quick Reference
| Code | Description |
|---|---|
| 13100 | Complex repair, trunk; 1.1-2.5 cm |
| +13102 | Complex repair, trunk; each additional 1.1-2.5 cm (add-on) |
| 13120 | Complex repair, scalp/arms/legs; 1.1-2.5 cm |
| 13121 | Complex repair, scalp/arms/legs; 2.6-7.5 cm |
| 13131 | Complex repair, face/neck/hands/feet/genitalia; 1.1-2.5 cm |
| 13132 | Complex repair, face/neck/hands/feet/genitalia; 2.6-7.5 cm |
| 12031 | Intermediate repair, scalp/axillae/trunk/ext; 2.5 cm or less |
| 12032 | Intermediate repair, scalp/axillae/trunk/ext; 2.6-7.5 cm |
| 97597 | Active wound care debridement ≤ 20 cm² |
| 11042 | Debridement, subcutaneous tissue; 20 cm² or less |
| 15002 | Surgical prep/recipient site, trunk/arms/legs; first 100 cm² |
| 15100 | Split-thickness autograft, trunk/arms/legs; first 100 cm² |
| 15570 | Formation of direct or tubed pedicle flap, trunk |
| 15734 | Muscle, myocutaneous, or fasciocutaneous flap, trunk |
AMA CPT® Professional Edition 2026 | CMS Physician Fee Schedule Look-Up Tool 2026 | CMS NCCI Policy Manual Chapter 4 | CMS ICD-10-CM Official Guidelines for Coding and Reporting FY2026 | CMS MS-DRG Definitions Manual v43 | AMA CPT Assistant Archives