Is G73.1 a billable ICD-10-CM code?

Yes. G73.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does G73.1 sit in the tabular list?

Diseases of the nervous system (G00-G99), in the block Diseases of myoneural junction and muscle (G70-G73).

What cannot be coded together with G73.1?

G73.1 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

G73.1

G73.1 — Lambert-Eaton syndrome in neoplastic disease

Billable / specific codeICD-10-CM

G73.1 is a billable, specific ICD-10-CM code for lambert-eaton syndrome in neoplastic disease. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

Lambert-Eaton syndrome not associated with neoplasm (G70.80-G70.81)

Code first

The underlying condition must be sequenced before this code.

underlying neoplasm (C00-D49)

Other codes that can never be billed with G73.1

These codes carry an Excludes1 note pointing at G73.1. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading G73.1 alone.

G70.81Lambert-Eaton syndrome in disease classified elsewhere

Risk adjustment

G73.1 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 196 Myasthenia Gravis without (Acute) Exacerbation and Other Myoneural Disorders0.516 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.

Medicare coverage

G73.1 is named in 34 Medicare coverage policies — 34 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A52479Oral Anticancer Drugs - Policy Article
A53052Billing and Coding: Home Health Speech-Language Pathology
A53057Billing and Coding: Home Health Occupational Therapy
A53058Billing and Coding: Home Health Physical Therapy

How G73.1 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to G73.1.

Syndrome›Lambert-Eaton›in›neoplastic disease

Related codes at this level

Codes that share G73. If G73.1 is not quite right, the correct code is usually one of these.

Questions about G73.1

Is G73.1 a billable ICD-10-CM code?: Yes. G73.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does G73.1 sit in the tabular list?: Diseases of the nervous system (G00-G99), in the block Diseases of myoneural junction and muscle (G70-G73).
What cannot be coded together with G73.1?: G73.1 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.