20827

Replantation of the thumb from the distal tip through the metacarpophalangeal (MP) joint following complete amputation.

Verified May 8, 2026 · 6 sources ↓

Medicare: $1,643.66
Total RVUs: 49.21
Global, days: 90
Region: Hand

Drawn from CMSEmednyAbosBedrockbillingAAPC

Documentation requirements

What must appear in the operative or office note to support the claim.

Source · Editorial brief grounded in 6 cited references ↓

Confirm complete (not partial) amputation — operative note must specify full severance through or distal to the MP joint
Document all structures repaired: bone fixation method, tendon(s) repaired by name, nerve(s), and vessel anastomoses (artery and vein)
Specify the level of amputation anatomically (distal tip to MP joint) to distinguish from 20824 (CMC to MP)
Record ischemia time (warm and cold) — payers and audit teams flag replantation notes missing this detail
Identify laterality (left vs. right thumb) explicitly in the operative note and on the claim
Note microsurgical technique used and any intraoperative complications that support a modifier 22 if work was substantially increased

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

22 Increased complexity 51 Multiple procedures 58 Staged or related 59 Distinct service 78 Unplanned return — related 79 Unrelated during global LT Left side RT Right side 80 Assistant surgeon AS PA/NP/CNS assistant

What this code covers

Source · Editorial summary grounded in 6 cited references ↓

CPT 20827 covers surgical reattachment of a completely amputated thumb, spanning the distal tip through the MP joint. The procedure involves microsurgical repair of bone, tendon, nerve, and vascular structures — typically performed in a hospital operating suite with a hand surgery team. It sits at the distal end of the thumb replantation pair: 20824 covers the CMC joint through the MP joint; 20827 covers the MP joint through the fingertip.

The 90-day global period means all routine postoperative management — wound checks, splinting, suture removal, and standard follow-up — is bundled through day 90. Separate billing for related services in that window requires modifier 24 (E/M unrelated to surgery) or modifier 78 (unplanned return to OR for a related complication). Planned staged procedures during the global use modifier 58. Unrelated OR procedures use modifier 79.

This code is listed on the ABOS Hand Surgery subspecialty case list and is recognized as a hand surgery CPT. Per CPT guidelines, 20827 is restricted to complete amputation — partial amputations of the thumb are not reported here. Incomplete amputations should be coded to the specific structures repaired (bone, tendon, nerve, vessel), with modifier 51 or 59 appended as appropriate.

RVU & reimbursement

Component RVUs and Medicare national rate. Actual payment varies by GPCI locality.

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU	26.79
Practice expense RVU	16.71
Malpractice RVU	5.71
Total RVU	49.21
Medicare national rate	$1,643.66
Global period	90 days

Payment by site of service

Medicare pays different rates by setting. HOPD typically pays substantially more than ASC for the same procedure.

Source · CMS OPPS Addendum B·ASC HCPCS payment rates·2026

Setting	Medicare rate (national)
Office (PFS non-facility) Procedure performed in physician's office	$1,643.66
HOPD (APC 5112) Hospital outpatient department	$1,642.82
ASC (PI G2) Ambulatory surgical center (freestanding)	$872.87

Common denial reasons

The recurring reasons claims for CPT 20827 get rejected.

Source · Editorial brief grounded in CMS NCCI edits, AAOS coding appeals, and cited references ↓

Incomplete documentation of amputation level — payers downcode to 20824 or deny when the note doesn't distinguish CMC-to-MP from distal-tip-to-MP
Code billed for partial amputation — 20827 is valid only for complete amputation; partial cases require component-specific repair codes
Missing laterality modifier (LT or RT) on the claim, triggering edit-based denial from many commercial payers
Global period violations — separate billing for related E/M or return-to-OR procedures without appropriate modifiers 24, 78, or 58
Site-of-service mismatch — replantation must be performed in a hospital setting; facility type inconsistencies prompt review

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 6 cited references ↓

01What's the difference between CPT 20824 and 20827 for thumb replantation?

20824 covers replantation from the carpometacarpal (CMC) joint through the MP joint. 20827 covers from the MP joint through the distal tip. The operative note must specify the amputation level clearly — coders should not select between these based on surgeon preference or assumption.

02Can 20827 be billed for a partial thumb amputation?

No. CPT guidelines restrict 20827 to complete amputation. For incomplete (partial) amputations, bill the individual repair codes for the specific structures involved — bone, tendon, nerve, vessel — and append modifier 51 or 59 as appropriate.

03Do I need a laterality modifier on 20827?

Yes. Append LT or RT. Many commercial payers and some MACs edit claims without laterality on unilateral digit procedures. Missing this is a straightforward, avoidable denial.

04How do I bill a return to the OR for vascular compromise during the global period?

Use modifier 78 for an unplanned return to the OR for a complication directly related to the replantation (e.g., arterial thrombosis requiring re-exploration). Use modifier 79 only if the return procedure is entirely unrelated to the original thumb replantation.

05Can modifier 22 be used on 20827?

Yes, if the work was substantially greater than typical — for example, multilevel vascular repairs, prior scarring complicating dissection, or prolonged ischemia requiring additional reconstruction. The operative note must document the specific factors that increased time and complexity, and you should include a cover letter with the claim.

06Where is 20827 typically performed, and does site of service affect payment?

Thumb replantation requires a hospital operating suite with microsurgical capability. The procedure is not appropriate for ASC or office settings. Site-of-service payment differentials apply — see the Site of Service comparison table on this page for HOPD vs. ASC rates.

Sources & references

Editorial content was developed using the following public sources. Last verified May 8, 2026.

Mira AI Scribe

Mira's AI scribe captures the amputation level (distal tip to MP joint), all structures repaired (bone fixation, tendons by name, nerve repair, arterial and venous anastomoses), laterality, and ischemia time from the surgeon's dictation. This prevents the most common audit flag: operative notes that confirm a replantation occurred but don't document the anatomical level or structural repairs needed to distinguish 20827 from 20824 or to defend against a partial-amputation downcode.

See how Mira captures CPT 20827 documentation