For specific POS instructions and determination of the applicable payment locality for the
PC (professional interpretation) and the TC of diagnostic tests see chapter 13, section 150
of this manual. For general policy on POS code assignment, see chapter 12, section
20.4.2 of this manual regarding the site of service payment differential under MPFS.
If the physician bills for lab services performed in his/her office, the POS code for
"Office" is shown. If the physician bills for a lab test furnished by another physician,
who maintains a lab in his/her office, the code for "Other" is shown. If the physician bills
for a lab service furnished by an independent lab, the code for "Independent Laboratory"
is used. Items 21 and 22 on the Form CMS-1500 must be completed for all laboratory
work performed outside a physician's office. If an independent lab bills, the place where
the sample was taken is shown. An independent laboratory taking a sample in its
laboratory shows "81" as place of service. If an independent laboratory bills for a test on
a sample drawn on an inpatient or outpatient of a hospital, it uses the code for the
inpatient (POS code 21), off campus-outpatient hospital (POS code 19), or on campus-
outpatient hospital (POS code 22), respectively.
For hospital visits by physicians, presume, in the absence of evidence to the contrary, that
visits billed for were made. However, review a sample of physician's records when there
are questionable patterns of utilization. Confirm these visits where the medical facts do
not support the frequency of the physician's visits or in cases of beneficiary complaints.
If questioning whether the visit had been made, ascertain whether the physician's own
entry is in the patient's record at the provider. Accept an entry where the nurses' notes
indicate that the physician saw the patient on a given day. A statement by the beneficiary
is also acceptable documentation if it was made close to the alleged date of the visit.
Entries in the physician's records represent possible secondary evidence. However, these
are of less value since they are self-serving statements. Exercise judgment regarding
their authenticity. The policy requiring daily physician visits is not conclusive if, in the
individual case, the facts did not support a finding that daily visits were made.
If a claim lacks a valid place of service (POS) code in item 24b, or contains an invalid
POS in item 24b, return the claim as unprocessable to the provider or supplier, using
Group Code CO, Claim Adjustment Remark Code (CARC) 16, and Remittance Advice
Remark Code (RARC) M77. Effective for claims received on or after April 1, 2004, only
one POS may be submitted on the Form CMS-1500 for services paid under the MPFS
and anesthesia services. If the place of service is missing and the MAC cannot infer the
place of service from the procedure code billed (e.g., a procedure code for which the
definition is not site specific or which can be performed in more than one setting), then
return services as unprocessable.
If place of service is inconsistent with procedure code billed, then edit for consistency or
compatibility between the place of service and site-specific procedure codes. If the place
of service is valid but inconsistent or incompatible with the procedure billed (e.g., the
place of service is inpatient hospital and the procedure code billed is office visit), then
return services as unprocessable since the MAC typically will not know whether the