CPT code 90473: Vaccine administration, first oral or intranasal vaccine2026 Medicare rate & RVUs in Missouri
Reports administration of the first vaccine given orally or intranasally, such as an oral rotavirus vaccine or intranasal influenza vaccine.
Medicare pays $15.79–$16.82 for 90473 in the office in Missouri, from Rest of Missouri to Metropolitan St. Louis, MO. Which amount applies depends on the service address.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
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On this page 9 sections
What 90473 covers
90473 reports the administration service for the first vaccine delivered by mouth or into the nose during the encounter. Examples include an oral rotavirus vaccine or an intranasal influenza vaccine. The vaccine product is coded separately. Nursing staff commonly administer these vaccines in a physician office or clinic, with the service reported by the practice responsible for the administration.
Select this code by route and order: it is for the first oral or intranasal vaccine, not an injectable vaccine or a count of vaccine components. Use 90474 for each additional oral or intranasal vaccine given at the same encounter. Documentation should identify the vaccine administered, its route, and the administration performed. CMS assigns physician work, practice-expense, and malpractice values to this service in the physician fee schedule; the vaccine product is a separate item from the administration service.
This summary was written with AI assistance from CMS physician fee schedule data and checked against the CMS billing rules shown here. Rates on this page come directly from CMS files.
Where 90473 pays more and less in Missouri
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
3 payment localities
$15.79 to $16.82
| Payment locality | Office | Facility |
|---|---|---|
| Metropolitan Kansas City, MO | $16.67 | Unavailable |
| Metropolitan St. Louis, MO | $16.82 | Unavailable |
| Rest of Missouri | $15.79 | Unavailable |
How the 90473 rate is calculated
Each of 90473’s three RVUs is multiplied by a geographic index (GPCI) for the payment locality, added up, and multiplied by the conversion factor. Drag the indexes or enter a ZIP to see what moves the rate.
How the rate is built · 90473
RVUs × geographic indexes × conversion factor
Work0.17
0.17 RVUs× 1.000 GPCI
Practice expense0.34
0.34 RVUs× 1.000 GPCI
Malpractice0.01
0.01 RVUs× 1.000 GPCI
Adjusted RVUs
0.5200
Conversion factor
$33.4009
Medicare rate
$17.37
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for 90473
90473 has no global surgery period, no multiple-procedure, bilateral or assistant-at-surgery adjustment, and no professional/technical split. What changes the payment is where the service happens: the place of service on the claim decides whether Medicare pays the office or the facility rate.
Place of service · 90473
Which rate does Medicare pay?
The POS code on the claim line (CMS-1500 box 24B).
POS 11 · non-facility rate · national
$17.37
Higher because the practice carries its own overhead.
90473 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- 90474Vaccine administrationAdditional oral or nasal vaccine
- 90473 is for the first oral or intranasal vaccine in the applicable sequence; 90474 reports each additional vaccine by either of those routes.
- 90471Immunization administrationFirst injectable vaccine
- 90471 is for the first vaccine administered by a route other than oral or intranasal. Choose 90473 when the first vaccine is given by mouth or nose.
- 90460Vaccine administrationFirst or only vaccine component
- 90460 applies to vaccine administration for patients through age 18 when the required face-to-face physician or qualified health care professional counseling is provided; 90473 is the route-specific administration code without that counseling distinction.
90473 billing questions
When should 90473 be used instead of 90471?
Use 90473 for the first vaccine administered orally or intranasally. Code 90471 describes administration of a vaccine by a route other than oral or intranasal, such as an injection.
How is a second oral or intranasal vaccine reported?
Report 90474 for each additional oral or intranasal vaccine administered during the encounter. It is an add-on to the applicable first-vaccine administration code.
Is the vaccine product included in 90473?
No. 90473 represents the administration service; report the vaccine product separately when applicable.
Does a combination vaccine count as multiple vaccines for this code?
No. A combination vaccine is counted as one vaccine for administration coding, rather than as multiple components.
What should the record show to support 90473?
Document the vaccine administered, that it was given by the oral or intranasal route, and that it was the first vaccine reported under the applicable administration sequence.
Where these rates come from
FeeBase calculates base physician payments from CMS work, practice-expense and malpractice RVUs, adjusted by each locality’s geographic indexes and the conversion factor. Services without a published rate are labeled, never given a made-up amount. Amounts are Medicare allowed amounts before claim adjustments: not a patient’s bill or a commercial rate.
CMS RVU26D · effective Oct 1, 2026 through the day before Jan 1, 2027
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