The first independent model for effective use of
advanced practice providers is limited independent prac-
tice. This model is based on ‘‘incident to’’ billing, which
is a type of physician extender billing practice for select
patients. Incident to billing is a Medicare provision that
allows midlevel providers to perform independent care but
bill at 100% reimbursement if certain criteria are met.
9,10
Stipulations for incident to billing include that the patient
must be an established patient within the scope of the
physician’s practice. Billing utilizes the physician’s billing
number and the physician must be on site.
9
The ideal
patients for limited independent practice and incident to
billing include follow-up patients and routine postoperative
patients. The low acuity and established nature of ‘‘incident
to’’ patients promotes a gentle transition between collabora-
tive and independent practice for physician extenders. The
model of limited independent practice differs from the
other independent practice models because it utilizes the
physician’s billing number for higher reimbursement rates.
However, only select patients meet criteria for this model
thereby limiting the scope of practice.
Partial Independent
In partial independent model utilization, the physi-
cian extender conducts patient encounters by himself or
herself with the physician available in the office. The
partial independent model promotes autonomy of the
advanced practice provider while allowing the capacity
for the physician to provide assistance on complex
patients. This model is advantageous because it allows
for increase in patient encounters without the addition of
another otolaryngology physician. Ideal patients include
walk-in, follow-up, routine postoperative, and low acuity
new patients. Reimbursement rates for patient encoun-
ters are less than physician reimbursement due to
utilization of the midlevel provider billing number. How-
ever, lower reimbursement rates are offset by the lower
salary rates of physician extenders. Although the partial
independent model is ideal for the busy practice, the prac-
tice must have available office space and the staffing
capacity for increased patient load.
Near Complete Independent
The final model is near complete independent prac-
tice. In this setting, the advanced practice provider will
practice with the supervising physician off site. The phy-
sician extender will function under a predetermined set
of guidelines and practice protocols. Periodic chart
reviews are often performed by the physician but the
degree of required supervision is regulated by the state.
2
Although the supervising physician is out of the office,
he or she is available for questions or situations that fall
outside of the practice parameters. This model is advan-
tageous, especially in solo or small group practice,
because it allows utilization of office space while the
physician is offsite or in the operating room. Again,
reimbursement is based on the physician extender bill-
ing number but provides the best utilization of resources
by preventing unused office space.
Application and Advantages of Utilization
Models
Midlevel providers are useful adjuncts for practi-
tioners who are unable to meet the clinical demand of
the community they serve. Busy solo or small private
practices may benefit from physician extenders employed
under the independent model of practice. Advanced prac-
tice providers in this setting may improve practice
efficiency and increase revenue by managing walk-in
appointments, low acuity or postoperative patients, and
situations where the physician is called to an emergency
during clinic hours.
11
A midlevel provider in this situation
may function through limited, partial, or near complete
independent practice, depending on the patient, acuity of
the situation, or location of the physician. It is important
to consider that the same advanced practice provider has
the flexibility to function within all of the model practice
patterns described during the same day or over time as a
practice grows and its needs change.
The addition of a midlevel provider is more econom-
ical
than adding another physician partner.
Reimbursement for advanced practice providers may
vary based on contractual agreements with private insur-
ance; however, is generally at 85% of the fee schedule
amount for physicians.
10,12
Although reimbursement
rates are moderately reduced compared to physician
rates, the compensation rate of midlevel providers com-
pared to physicians is dramatically different.
13
Dierick-
van Daele et al.
13
found that ‘‘direct costs plus productiv-
ity costs were significantly lower for nurse practitioner
consultations’’ compared with consultations of general
practitioners. According to a national survey, the average
base salary for advanced practice providers is $80,000
plus addition costs of 25% to 30% for benefits and over-
head.
12
The annual salary for PAs in otolaryngology
practices is $86,856 versus $90,019 annually for all other
PAs.
3
Furthermore, adding a midlevel provider may be
easier than finding an otolaryngologist available for hire
particularly in rural settings and as the demand for
healthcare services continues to exceed the number of
specialists trained.
A final benefit for utilization of midlevel providers
is one of improvement in patient care. Patient satisfac-
tion, patient education, and management of chronic
diseases are improved by creating a multidisciplinary team
approach to patient care through the addition of advanced
practice providers in the collaborative practice model.
2,14
Patient education may be improved in areas such as
tobacco cessation or nutrition, especially for patients with
head and neck cancer. In a systematic review of the recent
primary care literature, patient education was found to be
significantly improved when NPs participate in patient
care.
7
Patient satisfaction is determined in part by time
spent in the patient encounter. Rashid’s integrative review
found that advanced practice nurses had unhurried consul-
tations with a tendency to reinforce messages making the
patient the focus of their attention.
15
Midlevel providers
may increase the amount of time spent with patients while
optimizing physician efficiency.
14
The benefit of improvement in patient care may be
best utilized in an academic setting or where the
Laryngoscope 121: November 2011
Norris et al.: Physician Extenders in Otolaryngology
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