20974

Noninvasive electrical stimulation applied to promote bone healing without surgical implantation of the stimulating device.

Verified May 8, 2026 · 6 sources ↓

Medicare: $95.19
Total RVUs: 2.85
Global, days: 0
Region: Multi-region

Drawn from CMSProvidencehealthplanUhcproviderAnthem

Documentation requirements

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

Source · Editorial brief grounded in 6 cited references ↓

Fracture or fusion site identified with ICD-10 code carrying the correct seventh character (K = nonunion for most fracture categories; M or N where applicable)
Clinical rationale documenting delayed union or nonunion — include imaging evidence (X-ray, CT) with date and interpretation confirming failed healing
Documentation that the device was applied or supervised in the clinical setting, not dispensed solely for home use (which requires DME pathway instead)
Prior authorization number or documentation that PA was obtained before the service date, as most commercial and Medicare Advantage payers require it
Physician order or prescription specifying device type, anatomical site, and treatment duration to support medical necessity review
Record distinguishing noninvasive application (20974) from invasive/implanted stimulation (20975) — operative note or encounter note must confirm no surgical placement

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

22 Increased complexity 52 Reduced services 59 Distinct service 76 Repeat, same physician 77 Repeat, another physician 78 Unplanned return — related

What this code covers

Source · Editorial summary grounded in 6 cited references ↓

CPT 20974 covers the physician's application or supervision of noninvasive (surface or external) electrical bone stimulation to promote healing at a fracture or fusion site. The device delivers low-level electrical current transcutaneously — no incision, no implant. It is used for delayed unions, nonunions, and post-fusion consolidation when standard healing is not progressing. The global period is 000, meaning no pre- or post-op work is bundled into the fee.

A critical coding boundary: 20974 is the physician-service code when the stimulator is applied in a clinical setting or prescribed and supervised in-office. When the device goes home with the patient for self-use, bill HCPCS E0747 (non-spinal applications) or E0748 (spinal applications) through DME — not 20974. Payers will deny both if billed together for the same episode. Do not substitute neurostimulator codes (64553–64595) or physical medicine electrical stimulation codes (97014, 97032) — NCCI explicitly prohibits those for bone healing applications.

Prior authorization is required by most commercial payers and many Medicare Advantage plans. Covered diagnoses typically require a seventh-digit 'K' (subsequent encounter, nonunion) on the fracture ICD-10 code, or M96.0 (pseudarthrosis after fusion), or Z98.1 (arthrodesis status). Missing or incorrect ICD-10 seventh characters are a leading denial trigger for this code.

RVU & reimbursement

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

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU	0.6
Practice expense RVU	2.09
Malpractice RVU	0.16
Total RVU	2.85
Medicare national rate	$95.19
Global period	0 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	$95.19

Common denial reasons

The recurring reasons claims for CPT 20974 get rejected.

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

ICD-10 seventh character missing or incorrect — fracture nonunion requires 'K' (or M/N) on subsequent encounter codes; initial encounter codes (A) are not covered indications
Concurrent billing of 20974 and DME code E0747/E0748 for the same episode — payers pay one or the other, not both
Missing prior authorization — most commercial payers and Medicare Advantage plans require PA before service; retroactive requests are routinely denied
Wrong code substitution — neurostimulator codes (64553–64595) or physical medicine electrical stimulation codes (97014, 97032) billed in place of 20974, triggering NCCI bundling denial
Insufficient documentation of nonunion — claims without imaging confirming failed bone healing are denied for lack of medical necessity

Frequently asked questions

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

01When should I bill 20974 vs. E0747 or E0748?

Bill 20974 when the physician applies or supervises electrical stimulation in the office or clinical setting. Bill E0747 (non-spinal) or E0748 (spinal) through the DME pathway when the device is dispensed to the patient for home use. Billing both for the same treatment episode results in denial — payers cover one route, not both.

02What ICD-10 codes support 20974?

Nonunion fracture codes with seventh character K (or M/N for certain femur and forearm categories), M96.0 (pseudarthrosis after fusion or arthrodesis), and Z98.1 (arthrodesis status) are the primary covered diagnoses. Anthem and similar payers publish explicit ICD-10 lists. Initial encounter fracture codes (seventh character A) are not covered indications.

03Is prior authorization required for 20974?

Yes, for most commercial payers and Medicare Advantage plans. Providence Health Plan, UnitedHealthcare, and Anthem all flag this code as requiring prior authorization. Submit imaging documentation of nonunion with the PA request. Proceeding without PA is the fastest path to a post-service denial.

04Can I bill 97014 or 97032 instead of 20974 for electrical bone stimulation?

No. The CMS NCCI Policy Manual (Chapter 4) explicitly states that physical medicine electrical stimulation codes 97014 and 97032 shall not be reported for electrical stimulation to aid bone healing. Use 20974 for the noninvasive application. Using 97014 or 97032 triggers a bundling denial.

05What is the global period for 20974, and does it affect same-day E&M billing?

20974 carries a 000 global period — no pre- or post-op days are included. A same-day E&M for a significant, separately identifiable service unrelated to the stimulation application can be billed with modifier 25, consistent with NCCI minor procedure E&M rules.

06Can 20974 be billed for spinal applications?

The CPT code itself is not anatomically restricted — it covers both spinal and non-spinal sites. However, when routing through DME for home use, payers differentiate: E0748 is the HCPCS code for spinal applications and E0747 for non-spinal. UnitedHealthcare's coding clarification specifically directs use of E0748 for all spinal levels when billing the DME path.

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 fracture or fusion site, clinical evidence of nonunion or delayed union, the specific ICD-10 code with seventh character, and confirmation that the device was applied noninvasively in the clinical setting rather than dispensed for home use. That detail prevents the two most common denials for 20974: wrong seventh character on the diagnosis and misrouting to the DME pathway when a physician-service claim is appropriate.

See how Mira captures CPT 20974 documentation