G0101 CPT Code: The Complete 2026 Billing Guide for Medicare Pelvic and Breast Exams

What Is HCPCS Code G0101?

HCPCS code G0101 is a Medicare-specific screening code that covers a pelvic and clinical breast examination performed for the early detection of cervical or vaginal cancer. It is one of the most frequently billed preventive service codes in OB/GYN practices that serve Medicare beneficiaries, and it is the code that separates the screening pelvic exam from the evaluation and management visit so Medicare can pay for each service independently.

Who it covers: G0101 applies to all female Medicare Part B beneficiaries. It is not a CPT code but an HCPCS Level II code created by CMS specifically for this Medicare preventive benefit. Commercial payers generally do not recognize G0101 and instead include the pelvic and breast exam within the preventive medicine visit codes (99381 through 99397).

What it requires: The provider must document at least 7 of the 11 required exam elements, which include both breast exam and pelvic exam components. Missing this documentation threshold is the most common reason G0101 claims are denied.

How often: Medicare covers G0101 every 24 months for normal-risk beneficiaries and every 12 months for high-risk beneficiaries. Billing inside the frequency window results in a denial that is entirely preventable.

What G0101 Covers

G0101 describes a screening pelvic examination and clinical breast examination performed as part of cervical or vaginal cancer screening for Medicare beneficiaries. The full HCPCS descriptor reads: “Cervical or vaginal cancer screening; pelvic and clinical breast examination.” The short descriptor on remittances reads “Ca screen;pelvic/breast exam.”

The code covers two distinct exam components bundled into one service: the clinical breast examination and the screening pelvic examination. Both must be performed and documented for the claim to stand. A pelvic exam without a breast exam, or a breast exam without a pelvic exam, does not support G0101 because the code requires both.

G0101 is covered at 100% by Medicare with no patient cost-sharing (no deductible and no coinsurance) when all eligibility and frequency requirements are met. This makes it one of the zero-cost preventive benefits for Medicare beneficiaries, which is a point worth communicating to patients who may otherwise decline the screening because they assume they will owe a copay.

One question we hear constantly from OB/GYN practice managers is why their G0101 claims deny when the exam was clearly performed. The answer almost always traces back to documentation: the provider performed both the pelvic and breast exam but did not document enough elements for the claim to meet the 7-of-11 threshold that CMS requires. The exam happened, but the chart note does not prove it in the way Medicare needs to see.

The 7-of-11 Documentation Rule

CMS requires that a G0101 claim be supported by documentation of at least 7 of the following 11 exam elements. This is not a guideline or a best practice. It is a hard requirement that Medicare contractors verify on audit, and ACOG has reported that certain Medicare contractors are denying G0101 claims specifically because the documentation falls below this threshold.

The 11 elements, organized by region:

Breast examination (1 element):

1. Inspection and palpation of breasts for masses or lumps, tenderness, symmetry, or nipple discharge.

Pelvic examination (up to 10 elements):

2. External genitalia (for example, general appearance, hair distribution, lesions).

3. Urethral meatus (size, location, lesions, prolapse).

4. Urethra (masses, tenderness, scarring).

5. Bladder (fullness, masses, tenderness).

6. Vagina (general appearance, estrogen effect, discharge, lesions, pelvic support, cystocele, rectocele).

7. Cervix (general appearance, lesions, discharge).

8. Uterus (size, contour, position, mobility, tenderness, consistency, descent, support).

9. Adnexa/parametria (masses, tenderness, organomegaly, nodularity).

10. Anus and perineum.

11. Rectal exam, including sphincter tone, presence of blood, masses, or hemorrhoids (where indicated).

Across the billing companies we vet for OB/GYN practices, the most common documentation gap on G0101 is a note that says “breast exam normal, pelvic exam normal” without specifying which structures were evaluated. That level of documentation covers perhaps 2 of the 11 elements. A note that lists findings for breasts, external genitalia, vagina, cervix, uterus, adnexa, and bladder covers 7 elements and meets the threshold. The difference between denial and payment is specificity in the chart note, not thoroughness in the exam room.

How Often Can You Bill G0101?

Medicare coverage of G0101 follows a frequency schedule tied to patient risk status. Getting the frequency wrong generates a denial that is entirely preventable with a simple eligibility check before the visit.

Patient Risk Status	Frequency	Minimum Interval
Normal risk	Every 24 months	At least 23 months since last screening pelvic exam
High risk	Every 12 months	At least 11 months since last screening pelvic exam
Childbearing age with abnormal Pap in prior 3 years	Every 12 months	At least 11 months since last screening pelvic exam

CMS defines high risk using specific clinical criteria: early onset of sexual activity, multiple sexual partners, history of sexually transmitted disease, fewer than three negative Pap smears (or any Pap smears) within the previous seven years, or DES (diethylstilbestrol) exposure as a daughter of a woman who took DES during pregnancy.

In our experience matching OB/GYN providers with billing partners, frequency-based denials on G0101 are the second most common denial reason after documentation insufficiency. The fix is straightforward: build a scheduling and eligibility check into the intake workflow that confirms the patient’s last G0101 date of service before the visit is booked. If the interval has not elapsed, the screening cannot be billed under G0101 for that encounter.

Which ICD-10 Codes Pair With G0101?

G0101 requires a screening diagnosis code. Using a symptom-based ICD-10 code instead of a screening code is the third most common reason for G0101 denials, because a symptom code tells the payer the visit is diagnostic, not preventive, and G0101 is a preventive screening code only.

ICD-10 Code	Description	Use With G0101
Z12.4	Encounter for screening for malignant neoplasm of cervix	Yes (primary)
Z12.72	Encounter for screening for malignant neoplasm of vagina	Yes
Z12.79	Encounter for screening for malignant neoplasm of other genitourinary organs	Yes
Z12.89	Encounter for screening for malignant neoplasm of other sites	Yes
Z01.411	Encounter for gynecological examination (general) (routine) with abnormal findings	Yes (instead of Z12.4 when screening is part of a routine gyn exam)
Z01.419	Encounter for gynecological examination (general) (routine) without abnormal findings	Yes (instead of Z12.4 when screening is part of a routine gyn exam)

Z12.4 is the diagnosis code most commonly paired with G0101 for routine cervical cancer screening. Z01.411 and Z01.419 (encounter for gynecological examination with and without abnormal findings, respectively) are equally valid: use one of them instead of Z12.4 when the screening is part of a routine gynecological exam, and never report a Z01.41- code and Z12.4 together. If the provider also addresses a symptomatic finding during the same encounter, the symptom code links to the E/M service (billed separately with modifier 25), not to G0101.

How to Bill G0101 With Q0091

G0101 and Q0091 are the two Medicare screening codes OB/GYN practices use together for preventive women’s health visits. G0101 covers the screening pelvic and breast exam. Q0091 (screening Papanicolaou smear; obtaining, preparing, and conveyance of cervical or vaginal smear to laboratory) covers the specimen collection for the Pap smear. They are separate services with separate reimbursement.

Code	What It Covers	2026 Medicare Non-Facility Payment
G0101	Screening pelvic and clinical breast exam	$39.75 (1.19 total RVUs)
Q0091	Obtaining and preparing screening Pap smear specimen	$46.09 (1.38 total RVUs)
Combined	Both screening services billed on same date of service	$85.84 total

Both codes are covered at 100% by Medicare with no patient cost-sharing when eligibility and frequency rules are met. Q0091 is billed only when a Pap smear specimen is actually collected. If the provider performs the pelvic and breast exam but does not collect a Pap smear, only G0101 is billed. If both are performed, both are submitted on the same claim with their respective screening ICD-10 codes.

Providers often come to us after discovering they have been leaving Q0091 off their Medicare claims for years, billing only G0101 when both services were performed. At $46.09 per claim, that adds up quickly across a Medicare patient panel. The fix is simple: any encounter where the provider collects a Pap smear specimen for a Medicare patient should include Q0091 alongside G0101.

Can You Bill G0101 With an E/M Visit?

Yes. G0101 can be billed on the same date of service as an evaluation and management (E/M) code when the provider addresses a separately identifiable clinical problem in addition to the preventive screening. The E/M code must carry modifier 25 to indicate a significant, separately identifiable service was performed during the same encounter.

A common scenario in OB/GYN: a Medicare patient comes in for her preventive screening. During the visit, the provider identifies abnormal vaginal discharge and evaluates it as a new problem. The claim includes G0101 (linked to Z12.4), Q0091 if a Pap was collected (linked to Z12.4), and 99213-25 or 99214-25 (linked to the ICD-10 code for the vaginal discharge, such as N76.0). Each service links to its own diagnosis, and the E/M documentation must support the level billed independently of the screening exam.

G0101 can also be billed alongside the Annual Wellness Visit (AWV) codes G0438 and G0439. The AWV does not include a clinical breast or pelvic exam in its required components, so billing both is appropriate when both are documented. This is another revenue opportunity that many OB/GYN practices miss on their Medicare patients.

G0101 for Commercial Payers

G0101 is a Medicare-specific HCPCS code. Commercial payers generally do not recognize or reimburse G0101 because the pelvic and breast exam components are included within the preventive medicine visit codes (CPT 99381 through 99397) for non-Medicare patients. Submitting G0101 to a commercial payer will typically result in a denial.

For commercially insured patients, the pelvic and breast exam is billed as part of the preventive visit code appropriate to the patient’s age and status. CPT introduced the pelvic exam add-on code +99459 in 2024, which some commercial payers now accept alongside the preventive visit to separately reimburse the pelvic exam component. Verify your major commercial payers’ policies on 99459 before adding it to your workflow. For a broader view of how coding changes are affecting OB/GYN billing across payer types, see the 2027 OB/GYN billing code changes overview.

Common G0101 Billing Mistakes

Every OB/GYN practice billing Medicare encounters the same G0101 errors. The practices that catch them do so before the claim goes out, not weeks later when the denial arrives.

1. Documenting fewer than 7 of the 11 elements. A chart note that says “pelvic exam normal, breast exam normal” does not meet the threshold. Each structure evaluated must be named with a finding. Fix: build a G0101 documentation template into your EHR that forces an entry for at least 7 elements.

2. Using a symptom code instead of a screening code. G0101 requires a screening diagnosis such as Z01.411, Z01.419, or a Z12 code. Linking it to a symptom code like N94.89 (other specified conditions of female genital organs) tells Medicare the visit is diagnostic, and the claim denies. Fix: always pair G0101 with Z01.411, Z01.419, Z12.4, Z12.72, Z12.79, or Z12.89, or with a qualifying high-risk code for annual screening.

3. Billing inside the frequency window. Submitting G0101 before the 23-month (normal risk) or 11-month (high risk) interval has elapsed results in a frequency denial. Fix: check the patient’s last G0101 date of service during intake, before the visit.

4. Submitting G0101 to a commercial payer. G0101 is a Medicare-specific HCPCS code. Commercial payers do not recognize it. Fix: for non-Medicare patients, bill the screening as part of the preventive visit code (99381 through 99397).

5. Missing Q0091 when a Pap smear was collected. If the provider collected a Pap specimen during the same encounter, Q0091 should be on the claim. Leaving it off forfeits $46.09 per visit. Fix: add Q0091 to every Medicare claim where a Pap specimen was obtained.

6. Omitting modifier 25 on same-day E/M. When the provider addresses a separate problem during the screening visit, the E/M code needs modifier 25. Without it, the E/M is denied or the G0101 is denied. Fix: append modifier 25 to the E/M code, not to G0101, and link each code to its own diagnosis.

Across the billing companies we vet, these six errors account for the vast majority of G0101 revenue loss. The documentation template fix alone resolves the most common denial. For a related deep dive on OB/GYN procedure billing, see our guide to CPT code 58300 for IUD insertion.

Frequently Asked Questions

Next Steps

For a broader view of how OB/GYN billing is changing heading into 2027, read the 2027 OB/GYN billing code changes overview.

For procedure-specific billing guidance on one of the most commonly billed OB/GYN codes, see our guide to CPT code 58300 for IUD insertion.

Ready to stop losing revenue on Medicare preventive visits? Get matched with an OB/GYN billing partner who catches the documentation gaps and coding errors that cost you money on every screening visit.