Veterans Administration Geographically-Adjusted 80th Percentile Conversion Factors

(3) CPT/HCPCS codes are separated into the following 23 CPT/HCPCS code groups: Allergy immunotherapy, allergy testing, cardiovascular, chiropractor, consults, emergency room visits and observation care, hearing/speech exams, immunizations, inpatient visits, maternity/cesarean deliveries, maternity/non-deliveries, maternity/normal deliveries, miscellaneous medical, office/home/urgent care visits, outpatient psychiatry/alcohol and drug abuse, pathology, physical exams, physical medicine, radiology, surgery, therapeutic injections, vision exams, and well-baby exams. For each of the 23 CPT/HCPCS code groups, representative CPT/HCPCS codes are statistically selected and weighted so as to give a weighted average RVU comparable to the weighted average RVU of the entire CPT/HCPCS code group (the selected CPT/HCPCS codes are set forth in the Milliman, Inc., Health Cost Guidelines fee survey); see paragraph (a)(3) of this section for Data Sources. The 80th percentile charge for each selected CPT/HCPCS code is obtained from the FAIR Health database. A nationwide conversion factor (a monetary amount) is calculated for each CPT/HCPCS code group as set forth in paragraph (f)(3)(i) of this section. The nationwide conversion factors for each of the 23 CPT/HCPCS code groups are trended forward to the effective time period for the charges, as set forth in paragraph (f)(3)(ii) of this section. The resulting amounts for each of the 23 groups are multiplied by geographic area adjustment factors determined pursuant to paragraph (f)(3)(iii) of this section, resulting in geographically-adjusted 80th percentile conversion factors for each geographic area for the 23 CPT/HCPCS code groups for the effective charge period.

1. Nationwide conversion factors.  Using the nationwide 80th percentile charges for the selected CPT/HCPCS codes from paragraph (f)(3) of this section, a nationwide conversion factor is calculated for each of the 23 CPT/HCPCS code groups by dividing the weighted average charge by the weighted average RVU.
   
   
2. Trending forward.  The nationwide conversion factors for each of the 23 CPT/HCPCS code groups, obtained as described in paragraph (f)(3)(i) of this section, are trended forward based on changes to the physicians' services component of the CPI-U. Actual CPI-U changes are used from the time period of the source data through the latest available month as of the time the calculations are performed. The three-month average annual trend rate as of the latest available month is then held constant to the midpoint of the calendar year in which the charges are primarily expected to be used. The projected total CPI-U change so obtained is then applied to the 23 conversion factors.
   
   
3. Geographic area adjustment factors.  Using the 80th percentile charges for the selected CPT/HCPCS codes from paragraph (f)(3) of this section for each geographic area, a geographic area-specific conversion factor is calculated for each of the 23 CPT/HCPCS code groups by dividing the weighted average charge by the weighted average geographically-adjusted RVU. The resulting conversion factor for each geographic area for each of the 23 CPT/HCPCS code groups is divided by the corresponding nationwide conversion factor determined pursuant to paragraph (f)(3)(i) of this section. The resulting ratios are the geographic area adjustment factors for the conversion factors for each of the 23 CPT/HCPCS code groups for each geographic area.

38 CFR 17.101(f)(3)