thesisPrototype

Government data

Colorado Medicaid caseload, August 2026

What will Colorado HCPF report as the first-print statewide Health First Colorado Medicaid total caseload for August 2026 in the Medical Premiums Expenditure and Caseload Report, not including CHP+?

Overdue · was due Sep 15, 2026

The resolver has no route for this target's reference, and the target has no registered resolution contract.

NO_ROUTE_UNREGISTERED · resolver status as of Oct 7, 2026

Forecast

1.25m
1.23m–1.27m
80% prediction interval
gpt-5.5Run record ↗

Cumulative probability

Chance that the outcome is at or below each value.

0%25%50%75%100%1.19m1.25m1.3mForecast value

Shaded band: 80% interval (1.23m–1.27m). Dashed line: point estimate (1.25m).

Derived from the point estimate and 80% interval; the agent did not report a full distribution.

Analysis

§Forecast for Colorado Medicaid total caseload in August 2026

Framing and exact resolver: this targets HCPF's statewide Health First Colorado Medicaid TOTAL caseload in the Medical Premiums Expenditure and Caseload Report for August 2026, converted from members to thousands. It is the same HCPF Medical Premiums TOTAL variant throughout; it is not CHP+, not a county-only report, and not the CMS Medicaid-and-CHIP snapshot.

▸ Reported tool use: official.lookupmodel report
Checked the HCPF Premiums, Expenditures and Caseload Reports page for the official data page and report timing convention.
↳ Fetched HCPF page statement that the reports describe monthly spending and caseload statistics for Medical Services Premiums; it states reports contain data about the prior month and that a link labeled August references August activity but is dated September. The page listed FY 2025-26 report links for 7 months from July 2025 through February 2026.
▸ Reported tool use: official.lookupmodel report
Read the February 2026 HCPF Medical Premiums Expenditure and Caseload Report table for the target TOTAL row and recent same-variant history.
↳ Fetched HCPF TOTAL caseload counts: July 2025 = 1,232,489; August 2025 = 1,235,329; September 2025 = 1,235,008; October 2025 = 1,235,943; November 2025 = 1,221,808; December 2025 = 1,229,956; January 2026 = 1,236,302.
▸ Reported tool use: official.lookupmodel report
Read earlier HCPF rows in the same February 2026 report for the one-year reference class and current-year growth rates.
↳ Fetched HCPF TOTAL caseload counts: January 2025 = 1,214,424; February 2025 = 1,209,525; March 2025 = 1,213,952; April 2025 = 1,223,788; May 2025 = 1,226,207; June 2025 = 1,230,633; the January 2026 over-the-year growth was 21,878 members and monthly growth was 6,346 members.
▸ Reported tool use: official.lookupmodel report
Checked HCPF's public homepage enrollment update as a cross-check on the latest level and Medicaid-versus-CHP+ distinction.
↳ Fetched HCPF enrollment update: in January 2026 there were 1,236,302 Coloradans enrolled in Health First Colorado and 75,103 enrolled in Child Health Plan Plus; the homepage also describes Medicaid as covering 1 in 5 Coloradans.
▸ Reported tool use: official.lookupmodel report
Checked CMS Medicaid and CHIP Eligibility Operations and Enrollment Snapshot page for broader public enrollment-release context.
↳ Fetched CMS monthly snapshot schedule: March 2026 was released June 26, 2026; February 2026 was released May 29, 2026; January 2026 was released April 24, 2026; December 2025 was released March 27, 2026.

Base rate/reference class: the official-source reference class is the same HCPF TOTAL row from January 2025 through January 2026. The base rate is slow-moving level persistence with modest positive drift: January 2026 was 1,236.302 thousand, up 21.878 thousand from January 2025 and only 0.973 thousand above August 2025 after a temporary November dip.

Level, momentum, one-off, and policy effects: the level anchor is 1,236.302 thousand. Momentum is modestly positive after the November 2025 dip reversed by January 2026. The January-to-August 2025 move was +20.905 thousand, but I damp that because unwind catch-up should be smaller in 2026. I add about +9.8 thousand for seven months of ordinary drift, +3.0 thousand for summer/new-fiscal-year seasonality, and subtract 2.0 thousand for renewal and budget-policy churn.

Prior/update/interval: persistence prior is the January 2026 HCPF TOTAL level of 1236.302 thousand; historical sample is January 2025 through January 2026 same-variant HCPF TOTAL values with successive monthly changes of -4.899, +4.427, +9.836, +2.419, +4.426, +1.856, +2.840, -0.321, +0.935, -14.135, +8.148, and +6.346 thousand. Adjustment components are +9.8 thousand level/momentum, +3.0 thousand seasonality, and -2.0 thousand policy/renewal churn, so point = 1236.302 + 9.8 + 3.0 - 2.0 = 1247.102, rounded to 1247.1 thousand. Monthly sigma = 6.359 thousand; for a seven-month horizon sigma = sqrt(7)*6.359 = 16.8 thousand, and 1.28*sigma = 1.28*16.8 = 21.5 thousand, giving 1247.1 +/- 21.5 = [1225.6, 1268.6].

Counter-considerations: upside risk is stronger retention, outreach, or delayed renewal closures that would land above the interval above 1268.6 thousand, roughly 32.3 thousand above the January 2026 level. Downside risk is renewed administrative churn, a reporting lag like November 2025, or faster eligibility losses that would land below the interval under 1225.6 thousand, roughly 10.7 thousand below January 2026. Outside the interval would most likely require either a sustained post-January surge beyond the 2025 summer path or another broad reporting/renewal shock.

Review disposition: accepted the suggestion to name the HCPF release page explicitly in resolutionSource and to attach threshold magnitudes to upside and downside scenarios; no required fixes were raised, and the resolver, source grounding, base-rate step, and interval math remain unchanged.

Key drivers

  • January 2026 HCPF level already near August 2025 level
  • post-unwind Medicaid attrition has largely stabilized
  • new fiscal-year and renewal timing can create small summer gains
  • November 2025 reporting dip reversed by January 2026
  • major federal Medicaid policy effects are mostly later than August 2026

Tool evidence

This run has no captured tool responses. “Reported tool use” in the analysis is the model’s account, not an archived tool response.

Sources and resolution

Official source
Colorado HCPF Premiums, Expenditures and Caseload Reports
Resolution date
September 15, 2026· outcome not recorded
Resolution rule
Resolve to the first HCPF FY 2026-27 Medical Premiums Expenditure and Caseload Report entry for August 2026, using the statewide Health First Colorado Medicaid TOTAL caseload row in whole members, converted to thousands. Use the first posted print available for the August activity report dated September 2026 and ignore later restatements or revised monthly reports. If HCPF publishes both PDF and XLS for the same first print, use the XLS/PDF value for the same TOTAL row; if they disagree on the first posting, use the PDF report value as the citable released table.
Run details

The analysis is the model’s written report. Tool-use descriptions in that report are model claims; the activity artifacts contain the execution record.

thesis.analyst · gpt-5.5 · fast · v2.2.0

pre-submit review · completed

The draft is publishable: resolver, prior, update, interval math, tail risks, units, and JSON fields are coherent with the ledger target.

  • info optional_suggestion: Name the HCPF page more explicitly in resolutionSource, e.g. "Colorado HCPF Premiums, Expenditures and Caseload Reports" instead of the generic "Official agency release".
  • info optional_suggestion: Tail scenarios could be slightly stronger if they attach rough level thresholds to the stated upside and downside mechanisms.

disposition not applicable: Review disposition: accepted the suggestion to name the HCPF release page explicitly in resolutionSource and to attach threshold magnitudes to upside and downside scenarios; no required fixes were raised, and the resolver, source grounding, base-rate step, and interval math remain unchanged.

disposition not applicable: Review disposition: accepted the suggestion to name the HCPF release page explicitly in resolutionSource and to attach threshold magnitudes to upside and downside scenarios; no required fixes were raised, and the resolver, source grounding, base-rate step, and interval math remain unchanged.

Activity artifacts

Complete original trace

§Forecast for Colorado Medicaid total caseload in August 2026

Framing and exact resolver: this targets HCPF's statewide Health First Colorado Medicaid TOTAL caseload in the Medical Premiums Expenditure and Caseload Report for August 2026, converted from members to thousands. It is the same HCPF Medical Premiums TOTAL variant throughout; it is not CHP+, not a county-only report, and not the CMS Medicaid-and-CHIP snapshot.

▸ Reported tool use: official.lookupmodel report
Checked the HCPF Premiums, Expenditures and Caseload Reports page for the official data page and report timing convention.
↳ Fetched HCPF page statement that the reports describe monthly spending and caseload statistics for Medical Services Premiums; it states reports contain data about the prior month and that a link labeled August references August activity but is dated September. The page listed FY 2025-26 report links for 7 months from July 2025 through February 2026.
▸ Reported tool use: official.lookupmodel report
Read the February 2026 HCPF Medical Premiums Expenditure and Caseload Report table for the target TOTAL row and recent same-variant history.
↳ Fetched HCPF TOTAL caseload counts: July 2025 = 1,232,489; August 2025 = 1,235,329; September 2025 = 1,235,008; October 2025 = 1,235,943; November 2025 = 1,221,808; December 2025 = 1,229,956; January 2026 = 1,236,302.
▸ Reported tool use: official.lookupmodel report
Read earlier HCPF rows in the same February 2026 report for the one-year reference class and current-year growth rates.
↳ Fetched HCPF TOTAL caseload counts: January 2025 = 1,214,424; February 2025 = 1,209,525; March 2025 = 1,213,952; April 2025 = 1,223,788; May 2025 = 1,226,207; June 2025 = 1,230,633; the January 2026 over-the-year growth was 21,878 members and monthly growth was 6,346 members.
▸ Reported tool use: official.lookupmodel report
Checked HCPF's public homepage enrollment update as a cross-check on the latest level and Medicaid-versus-CHP+ distinction.
↳ Fetched HCPF enrollment update: in January 2026 there were 1,236,302 Coloradans enrolled in Health First Colorado and 75,103 enrolled in Child Health Plan Plus; the homepage also describes Medicaid as covering 1 in 5 Coloradans.
▸ Reported tool use: official.lookupmodel report
Checked CMS Medicaid and CHIP Eligibility Operations and Enrollment Snapshot page for broader public enrollment-release context.
↳ Fetched CMS monthly snapshot schedule: March 2026 was released June 26, 2026; February 2026 was released May 29, 2026; January 2026 was released April 24, 2026; December 2025 was released March 27, 2026.

Base rate/reference class: the official-source reference class is the same HCPF TOTAL row from January 2025 through January 2026. The base rate is slow-moving level persistence with modest positive drift: January 2026 was 1,236.302 thousand, up 21.878 thousand from January 2025 and only 0.973 thousand above August 2025 after a temporary November dip.

Level, momentum, one-off, and policy effects: the level anchor is 1,236.302 thousand. Momentum is modestly positive after the November 2025 dip reversed by January 2026. The January-to-August 2025 move was +20.905 thousand, but I damp that because unwind catch-up should be smaller in 2026. I add about +9.8 thousand for seven months of ordinary drift, +3.0 thousand for summer/new-fiscal-year seasonality, and subtract 2.0 thousand for renewal and budget-policy churn.

Prior/update/interval: persistence prior is the January 2026 HCPF TOTAL level of 1236.302 thousand; historical sample is January 2025 through January 2026 same-variant HCPF TOTAL values with successive monthly changes of -4.899, +4.427, +9.836, +2.419, +4.426, +1.856, +2.840, -0.321, +0.935, -14.135, +8.148, and +6.346 thousand. Adjustment components are +9.8 thousand level/momentum, +3.0 thousand seasonality, and -2.0 thousand policy/renewal churn, so point = 1236.302 + 9.8 + 3.0 - 2.0 = 1247.102, rounded to 1247.1 thousand. Monthly sigma = 6.359 thousand; for a seven-month horizon sigma = sqrt(7)*6.359 = 16.8 thousand, and 1.28*sigma = 1.28*16.8 = 21.5 thousand, giving 1247.1 +/- 21.5 = [1225.6, 1268.6].

Counter-considerations: upside risk is stronger retention, outreach, or delayed renewal closures that would land above the interval above 1268.6 thousand, roughly 32.3 thousand above the January 2026 level. Downside risk is renewed administrative churn, a reporting lag like November 2025, or faster eligibility losses that would land below the interval under 1225.6 thousand, roughly 10.7 thousand below January 2026. Outside the interval would most likely require either a sustained post-January surge beyond the 2025 summer path or another broad reporting/renewal shock.

Review disposition: accepted the suggestion to name the HCPF release page explicitly in resolutionSource and to attach threshold magnitudes to upside and downside scenarios; no required fixes were raised, and the resolver, source grounding, base-rate step, and interval math remain unchanged.

calibrated forecast · 80% CI
1.25m[1.23m · 1.27m]
Target metadata

Data point: co.hcpf.medicaid.total_caseload.2026-08.first_print

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