Using the same billing code multiple times for one treatment.

I'm reviewing some healthcare bills. And I feel like I'm being billed twice as I see the same code in different places though it was only done once. duplicate codes appear in almost all my bills. Here are 3 examples:

Detailed Account Information

Clinic Visit

$205.00

Office/Outpatient Visit – 99213 (CPT®)

$123.00

Office/Outpatient Visit – 99213 (CPT®)

That's for a single visit to one office.

And here's another for a single injection on a single tendon:

Detailed Account Information

Clinic Visit

$927.00

Injection of 1 Tendon – 20550 (CPT®)

$210.00

Office/Outpatient Visit – 99204 (CPT®)

$295.00

New Patient Level 4 – 99204 (CPT®)

$422.00

Hide charges

Operating Room Services

$311.00

Injection(S); Single Tendon Sheath, or Ligament, Aponeurosis (Eg, Plantar "Fascia") – 20550 (CPT®)

$311.00

Hide charges

Pharmacy

$132.36

Betamethasone Acetate 3mg and Sodium Phosphate 3mg, Inj (00517-0720-01) – quantity: 4 – J0702 (HCPCS)

$132.36

And the Third, which has multiple duplicates of something that was done ONCE.

Occupational Therapy

$1,078.00

Application of a Modality to 1 or More Areas; Ultrasound, Each 15 Minutes – 97035 (CPT®)

$77.00

Mnl Ther Tqs 1+ Regions Ea 15 Min – 97140 (CPT®)

$158.00

Physical Performance Tst/Meas W/Rprt 15 Min – 97750 (CPT®)

$180.00

Mnl Ther Tqs 1+ Regions Ea 15 Min – 97140 (CPT®)

$158.00

Ther Px 1+ Areas Ea 15 Min Ther Xerss – 97110 (CPT®)

$90.00

Physical Performance Tst/Meas W/Rprt 15 Min – 97750 (CPT®)

$180.00

Application of a Modality to 1 or More Areas; Ultrasound, Each 15 Minutes – 97035 (CPT®)

$77.00

Mnl Ther Tqs 1+ Regions Ea 15 Min – 97140 (CPT®)

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$158.00

I think they are double charging me frequently. Are they supposed to use the same billing code multiple times if it's only done once?
Thank you to anyone who took the time to read this. And if there are any resources I should/could utilize please feel free to point me in the right direction, or if I should ask this somewhere else.

submitted by /u/PartOwn6915
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