Units over the limit
Multiple specimen units for 88305 or stains can trigger medically unlikely edits.
How we prevent it: Each specimen is documented in the report and billed per the CPT specimen definition.
PATHOLOGY LAB BILLING
Pathology Lab Billing Services
Pathology labs bill professional and technical components for surgical pathology and cytology, with coding based on specimen type and complexity.
No upfront feesHIPAA-compliantSpecialty-trained coders
$0
Upfront or setup fees
0
Revenue cycle steps managed end to end
0
Specialties and lab types we bill for
0
Of your data and systems stay yours
OVERVIEW
Pathology Lab billing done right
Pathology labs bill professional and technical components for surgical pathology, cytology, immunohistochemistry and special stains. Who owns the lab, who reads the slides and where the specimen came from decide whether a claim is billed globally or split.
Surgical pathology is coded per specimen, and each additional stain and antibody has its own unit rules. Hospital specimens are subject to the Medicare date-of-service rules, and purchased interpretations may fall under anti-markup limits.
We code from the final pathology report, count specimens and stains correctly, split components by billing arrangement and keep referring provider data clean so claims are paid on the first pass.
Also see our medical coding, denial management, eligibility verification and revenue cycle management services.
CODING
Common pathology lab CPT & HCPCS codes we bill
Pathology codes depend on the specimen, the level of examination and each stain performed.
| Code | Description | What we watch for |
|---|---|---|
| 88305 | Surgical pathology, gross and microscopic, Level IV | Billed per specimen; separately identified specimens each get a unit. |
| 88307 | Surgical pathology, gross and microscopic, Level V | Level depends on specimen type as listed in CPT. |
| 88304 | Surgical pathology, gross and microscopic, Level III | Common for specimens such as gallbladders and hernia sacs. |
| 88342 | Immunohistochemistry, initial single antibody stain, per specimen | Use 88341 for each additional single antibody on the same specimen. |
| 88341 | Immunohistochemistry, each additional single antibody stain, per specimen (add-on) | Reported with 88342 for the same specimen. |
| 88312 | Special stain, Group I for microorganisms | Billed per specimen and per stain. |
| 88331 | Pathology consultation during surgery, first tissue block, frozen section | Add 88332 for each additional block. |
| 88175 | Cervical or vaginal cytology, liquid-based, automated screening and manual rescreening | Screening and diagnostic Pap smears use different diagnosis codes. |
| 88112 | Cytopathology, cell enhancement technique, except cervical or vaginal | For non-gynecologic cytology such as urine and fluids. |
| 88360 | Morphometric analysis, tumor IHC, per specimen, manual | Use 88361 when computer-assisted technology is used. |
Code descriptions are summarized. CPT® is a registered trademark of the American Medical Association. Coverage and payment rules vary by payer and change every year; we code to the current code set and your payers’ policies.
Modifiers that matter in pathology lab billing
26
Professional componentFor the pathologist’s interpretation when the lab or hospital bills the technical part.
TC
Technical componentFor the slide preparation and processing only.
59 / XS
Separate specimenFor stains or services on separate specimens that NCCI pairs together.
90
Reference laboratoryWhen a test is sent to and performed by another lab.
DENIALS
Why pathology lab claims get denied
The denial reasons we see most often in pathology lab billing, with the claim adjustment reason code (CARC) payers usually attach, and what we do so they don't happen again.
Component modifier missing
Billing globally for a hospital specimen, or omitting 26 or TC, is denied.
How we prevent it: We bill by place of service, specimen source and billing arrangement.
Stain not medically necessary
Payers question large IHC panels without a documented diagnostic need.
How we prevent it: We code stains from the report and query when the reason is not documented.
Missing referring provider or specimen data
Claims without the ordering provider NPI or collection date are rejected.
How we prevent it: Requisitions are validated at accessioning.
Billed to the wrong payer
Hospital inpatient specimens may need to be billed to the hospital, not Medicare.
How we prevent it: We apply Medicare date-of-service rules to decide who is billed.
HOW WE WORK
How we run your pathology lab revenue cycle
From the first eligibility check to the final patient payment, one dedicated team handles every step and reports back to you.
01
Eligibility and authorization
We verify coverage, benefits, copays and deductibles before the visit. For pathology, that means validating requisition and insurance data at accessioning.
02
Charge capture and coding
Our coders review documentation and assign CPT, HCPCS and ICD-10-CM codes to the highest supported specificity. Specimens, stains and levels are coded from the final signed report.
03
Claim scrubbing and submission
Every claim is checked against NCCI edits, payer policies and modifier rules before it goes out electronically, so it is paid on the first pass.
04
Payment posting and reconciliation
We post ERAs and EOBs, compare payments to your contracted rates and flag underpayments for appeal.
05
Denial management and A/R follow-up
Every denial is worked: corrected, appealed or escalated, with root causes fed back to the front end. Unit and component denials are corrected and appealed with the report.
06
Reporting and patient billing
You get clear monthly reports on collections, denials and A/R aging, and patients get easy-to-read statements and answers to billing questions.
COMPLIANCE
Pathology Lab payer rules we track for you
Rules that change how pathology lab claims must be coded, documented and submitted.
Per-specimen coding: each separately identified and examined specimen gets its own surgical pathology unit.
Date of service rule: Medicare rules decide whether the lab or the hospital bills for specimens from hospital patients.
Anti-markup: purchased interpretations and technical components may be limited to the purchase price.
IHC units: stains are billed per specimen and per antibody, not per slide.
FAQ
Pathology Lab billing questions
Do you bill both professional and technical components?
Yes. We bill global, professional-only and technical-only claims depending on your arrangements with hospitals, clinics and other labs.
Can you handle client billing?
Yes. We manage client bills to hospitals and practices as well as insurance and patient billing.
Do you bill molecular pathology?
Yes. See our molecular lab billing page for genetic and molecular test billing.
How much do your pathology lab billing services cost?
We charge a percentage of what we actually collect for you, with no upfront or setup fees. Your rate depends on claim volume and the services you need, so we quote it after a free review of your current billing.
Do we have to change our EHR or practice management system?
No. We work inside the systems you already use, and your data stays yours. We set up secure access, learn your workflows and start working claims without disrupting your front desk.
Related specialties
FREE PATHOLOGY LAB BILLING REVIEW
Get Paid
Send us a sample of your pathology lab denials and A/R. We'll show you where revenue is slipping and how we'd fix it, with no obligation and no upfront fees.