Chart 4b. All-payer indexes for outpatient hospital services, medical claims data with a 3-month lag, April 2016–March 2020
Date	Comparison unchained Lowe	Consumer Price Index	Medical claims unchained Lowe (lagged)	Medical claims mixed quantity (lagged)	Medical claims chained Törnqvist (lagged)
Apr 2016	100.00	100.00	100.00	100.00	100.00
May 2016	100.57	100.28	100.36	100.28	100.24
Jun 2016	100.63	100.22	100.59	100.76	100.51
Jul 2016	101.19	100.57	100.58	100.83	100.44
Aug 2016	102.42	101.94	100.22	100.57	100.25
Sep 2016	102.96	102.24	101.05	101.52	100.84
Oct 2016	104.01	102.42	103.20	103.53	103.14
Nov 2016	104.36	102.36	103.24	103.60	103.51
Dec 2016	105.02	102.35	103.17	103.50	103.27
Jan 2017	104.55	103.11	102.85	103.33	103.24
Feb 2017	104.74	104.48	102.56	103.27	103.27
Mar 2017	104.64	104.69	102.32	103.30	103.36
Apr 2017	105.35	105.97	102.11	103.44	103.51
May 2017	104.54	105.85	102.66	103.52	103.79
Jun 2017	104.60	106.35	102.86	104.27	104.06
Jul 2017	104.41	106.70	103.11	104.74	104.34
Aug 2017	105.75	106.58	102.95	104.24	104.34
Sep 2017	104.39	106.89	104.08	105.08	105.45
Oct 2017	104.93	107.36	103.99	104.57	105.05
Nov 2017	105.07	107.20	104.46	105.03	105.35
Dec 2017	105.05	107.30	105.28	106.35	106.31
Jan 2018	108.30	109.33	104.78	106.09	106.31
Feb 2018	108.64	109.57	104.99	106.35	106.61
Mar 2018	109.57	110.07	105.20	106.62	106.90
Apr 2018	109.66	110.24	105.41	107.16	107.20
May 2018	109.77	110.36	106.02	107.63	107.80
Jun 2018	110.63	110.94	106.91	108.45	108.78
Jul 2018	110.99	111.29	106.74	108.14	108.67
Aug 2018	111.59	110.65	107.09	108.42	109.01
Sep 2018	111.49	110.33	107.74	109.14	109.62
Oct 2018	112.62	110.54	107.95	109.24	109.90
Nov 2018	112.91	111.36	108.44	109.67	110.48
Dec 2018	112.87	111.62	109.02	110.53	110.91
Jan 2019	113.73	112.00	109.39	111.09	111.50
Feb 2019	114.64	111.89	109.57	111.30	111.52
Mar 2019	113.83	111.97	110.08	111.80	112.02
Apr 2019	113.79	111.29	111.00	114.93	113.94
May 2019	113.16	111.31	110.64	114.40	113.24
Jun 2019	114.27	111.01	109.82	113.33	112.65
Jul 2019	114.67	111.69	110.26	113.33	112.93
Aug 2019	115.34	112.93	110.71	113.38	113.39
Sep 2019	115.52	112.72	111.22	112.96	113.90
Oct 2019	116.06	113.80	111.58	113.32	114.08
Nov 2019	116.14	113.83	112.06	113.35	114.65
Dec 2019	115.71	113.84	112.18	114.55	114.70
Jan 2020	115.67	115.51	112.98	115.90	115.35
Feb 2020	116.80	115.84	114.19	118.22	116.63
Mar 2020	117.46	116.00	113.89	118.84	116.31
Source: U.S. Bureau of Labor Statistics.