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Same Patient, Same Day, Same Code, Different Doctors

Same Patient, Same Day, Same Code, Different Doctors

When a surgery calls for more than one surgeon, append the right modifier to capture everyone’s payment.

Complex surgeries may require the efforts of more than a single surgeon. When this occurs, documentation and coding requirements (especially modifier application) become more intricate, as well. Read on to learn the basics for submitting these claims cleanly.

It Really Is About the Modifiers

When more than one surgeon takes part in a surgical service, you’ll need to sel

ect from among five CPT® modifiers and one HCPCS Level II modifier. Each modifier describes a unique circumstance and comes with its own documentation requirements — which may vary, depending on the payer.
Editor’s Note: Coding and documentation advice given in this article apply to Medicare payers, unless otherwise specified. Requirements may differ for non-Medicare payers.
We’ll review each modifier, beginning with two modifiers that describe circumstances when two or more surgeons work independently of one another to perform a single procedure. Then, we will move on to the modifiers that describe two providers working together (one as a primary surgeon, the other as an assistant) to complete a procedure.

Modifier 62: Two Surgeons Act Independently to Perform One Procedure

When two surgeons work independently to complete a procedure described by a single CPT® code, you should look first to modifier 62 Two surgeons.
The Centers for Medicare & Medicaid Services (CMS) limits the CPT® codes to which modifier 62 may be appended. To determine if a specific code is eligible for Medicare reimbursement with modifier 62, you may reference the Medicare Physician Fee Schedule (MPFS) Relative Value File. Within the file, find the CPT® or HCPCS Level II code that represents the service you wish to report, and tab right to the column labeled “CO-SURG.” If that column contains a “1,” Medicare may allow modifier 62 with the code in question when supporting documentation establishes medical necessity for two surgeons (e.g., the duration of a trauma surgery may require that two surgeons work in shifts). A “2” means Medicare allows modifier 62 with that code if each of the operating surgeons is of a different specialty (i.e., each surgeon brings a different “skill set” to the operating table). Either a “0” or a “9” means Medicare does not allow modifier 62 with that code.
Medicare payers reimburse procedures reported with modifier 62 at 125 percent of the regular fee schedule amount. The payer divides this between the two surgeons, so each surgeon receives 62.5 percent of the standard fee. If either surgeon files their claim incorrectly, however, one or both surgeons could miss out on reimbursement. To avoid this outcome, each surgeon should:

  • Document their own operative note, detailing which portion of the procedure they performed, how much work was involved, and how long the procedure took. Because each surgeon is working independently to perform a distinct portion of the procedure, they cannot share documentation.
  • Submit claims using the same CPT® code with modifier 62 appended.
  • Link the same diagnosis to the common procedure code.
  • Identify the other surgeon as a co-surgeon.

CPT® Assistant (March 2018) provides the following example of modifier 62 application:
Question: When performing a translabyrinthine approach for the resection of a vestibular schwannoma, is it correct to report codes 61595 and 61616, or code 61526?
Answer: This is a cerebellopontine angle (CPA) tumor, and should be reported with code 61526, Craniectomy, bone flap craniotomy, transtemporal (mastoid) for excision of cerebellopontine angle tumor. Code 61526 was established specifically for translabyrinthine vestibular schwannoma removal. If both an otolaryngologist and neurosurgeon worked as a team to perform their respective portions of the procedure, each surgeon would report code 61526 with modifier 62, Two Surgeons, appended. Skull base codes 61595, Transtemporal approach to posterior cranial fossa, jugular foramen or midline skull base, including mastoidectomy, decompression of sigmoid sinus and/or facial nerve, with or without mobilization, and 61616, Resection or excision of neoplastic, vascular or infectious lesion of base of posterior cranial fossa, jugular foramen, foramen magnum, or C1-C3 vertebral bodies; intradural, including dural repair, with or without graft, should not be reported.

Modifier 66: It Takes a Team

Modifier 66 Surgical team applies when three or more surgeons work as a team to complete a surgery defined by a single CPT® code. Each surgeon should act independently to perform a portion of the procedure.
Modifier 66 is used rarely, and as with modifier 62, CMS limits the CPT® codes to which it may be appended. To determine if modifier 66 may be appended to a code, look again to the MPFS Relative Value File. Locate the CPT® or HCPCS Level II code that represents the service you wish to report. If the column labeled “TEAM SURG” contains a “1,” Medicare may allow modifier 66 when supporting documentation establishes medical necessity for a surgical team. A “2” means Medicare will permit modifier 66 with that code if each of the operating surgeons is of a different specialty. A “0” or “9” means you cannot append modifier 66 with that code.
When a team surgery occurs, each surgeon must bill independently, appending modifier 66 to the code that describes the procedure performed. Each surgeon must also report their own operative report, which should establish the surgeon’s distinct portion of the procedure.
Medicare payers determine reimbursement for team surgeries at the time of review, based on the documentation each physician provides.

Distinguish Assistants at Surgery

The next four modifiers we will discuss describe cases when a primary surgeon and an assistant surgeon work together in the operating room to complete a procedure. In these cases, the assistant surgeon provides an “extra pair of hands,” but does not operate independently of the primary surgeon.
Here, again, we will use the MPFS Relative Value File to determine whether a code allows for the use of an assistant at surgery. If the “ASST SURG” column for the code in question includes a “0,” Medicare may allow payment for an assistant at surgery when supporting documentation establishes medical necessity. A “2” in the “ASST SURG” column means that an assistant at surgery typically will be paid. Either a “1” or a “9” means that an assistant at surgery will not be paid for that code.
Surgical assistants — regardless of which modifier is used to report their services — do not dictate their own operative reports. Instead, the primary surgeon should specify what role the assistant surgeon played and why their assistance was needed. It’s not enough simply to list the assistant’s name.
After you have determined that an assistant at surgery modifier may be applied, you must determine which modifier is applicable.

Modifier 80 Describes Doctor Assist

When reporting services to Medicare, modifier 80 Assistant surgeon identifies a surgical first assistant who is a medical doctor. CPT® Assistant (March 1996) further explains:

If an assistant surgeon assists a primary surgeon and is present for the entire operation, or a substantial portion of the operation, then the assisting physician reports the same surgical procedure as the operating surgeon. The operating surgeon does not append a modifier to the procedure that he/she reports. The assistant surgeon reports the same CPT code as the operating physician, with modifier -80 appended.

For example, to report a closure of intestinal cutaneous fistula, the primary operating surgeon reports code 44640, and the assistant surgeon reports 44640-80. For assistant at surgery services performed by a medical doctor, Medicare pays 16 percent of the usual global surgery fee schedule amount.

Modifier 82 Describes Assistant Surgeon in a Teaching Hospital

Modifier 82 Assistant surgeon (when qualified resident surgeon not available) applies only in a teaching hospital. Typically, Medicare does not make separate payment for an assistant surgeon when a surgery is provided in a teaching hospital with a training program related to that surgical procedure because the hospital has been reimbursed for such services already, via its residence funding. There are times, however, when modifier 82 may be appended and separate payment for a surgical assistant may be made:

  • When a qualified resident is not available to assist.
  • Under exceptional medical circumstances (emergency, life threatening situations such as multiple traumatic injuries) requiring immediate treatment or otherwise justify the services of a physician or non-physician practitioner (NPP) to assist at surgery, even though a qualified resident is available; or
  • If the primary surgeon has an across-the-board policy of never involving residents in the preoperative, operative, or postoperative care of their patients (see Social Security Act XVIII section 1842(D)(i)).

Medicare does not establish national guidelines regarding the appropriate documentation to support the use of modifier 82, and instead leaves this determination to its fiscal intermediaries (FIs) and Medicare Administrative Contractors (MACs). For more information, see MLN Matters: MM6123 Revised.

Check with Your Payer for Modifier 81

Modifier 81 Minimum assistant surgeon is tricky to apply, at least in part because CPT® doesn’t provide a clear definition of “minimum” in this context. CPT® Assistant (March 1996) provides inconclusive guidance:

At times, while a primary operating physician may plan to perform a surgical procedure alone, during an operation circumstances may arise that require the services of an assistant surgeon for a relatively short time. In this instance, the second surgeon provides minimal assistance, for which he/she reports the surgical procedure code with the – 81 modifier appended.

Some non-Medicare payers may allow modifier 81 for mid-level providers, such as physician assistants (PAs), who act as surgical assistants. Because the rules are inconsistent, ask for your payer’s instructions, in writing, before applying modifier 81.

For Medicare Claims, Use Modifier AS for NPP Assist

When a qualified NPP, rather than a medical doctor, acts as an assistant in the operating room, Medicare requires that you report that assistant’s services using the same CPT® code as the primary surgeon, with HCPCS level II modifier AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery appended.
Modifier AS is limited to use by PAs, nurse practitioners, or clinical nurse specialists. Medicare will not reimburse for surgical assistance by other NPPs, such as registered nurses, orthopedic PAs, licensed practical nurses, and certified surgical technologists. For Medicare, the PA assisting at surgery must have a Medicare (or Medicaid) provider number.
Because modifier AS tells Medicare payers who did the assisting, and not the extent of their assistance; you must append modifier AS in addition to modifier 80, 81, or 82, as appropriate. Per MLN Matters Number: MM6123 Revised, “Be aware that when you use Modifier AS, you must also use Modifier 80, 81, or 82 because using these modifiers without modifier AS indicates that a physician served as the surgical assistant. Claims that you submit with modifier AS and without modifier 80, 81 or 82 will be returned to you.”
If you’re unfamiliar with the Medicare Physician Fee Schedule (MPFS) Relative Value File, you can find an introductory tutorial on AAPC’s Knowledge Center.

MPFS Relative Value File is updated at least once, per year (and often, multiple times per year), and can be downloaded for free from the CMS website at:
MLN Matters: MM6123 Revised:

John Verhovshek
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About Has 570 Posts

John Verhovshek, MA, CPC, is a contributing editor at AAPC. He has been covering medical coding and billing, healthcare policy, and the business of medicine since 1999. He is an alumnus of York College of Pennsylvania and Clemson University.

No Responses to “Same Patient, Same Day, Same Code, Different Doctors”

  1. Kristina Hiller says:

    Please clarify your statements, “you must append modifier AS in addition to modifier 80, 81, or 82, as appropriate” and “Claims that you submit with modifier AS and without modifier 80, 81 or 82 will be returned to you”. You references the MLN Matters: MM6123 Revised. That MLN is only for Critical Access Hospitals (CAH) yet your article does not mention anything about CAH. . As appropriate meaning only for surgical assistants at a CAH? Thank you.