Health data infrastructure · Price transparency
Serif Health
A company whose whole product is the cleanup of two federal disclosure rules. It turns payer and hospital machine readable files into a queryable rate dataset.
A paper straw on an ocean of data
In June 2024 the largest private health insurer in the United States changed how it posted its price files. UnitedHealthcare added signed URLs and routed downloads through a new web service. The files were still public and still mandatory. They were just harder to get.
Matt Robben, co-founder and chief technology officer, wrote up what followed. Almost half the files his team tried to pull on May 1 and June 1 failed with an aborted status. It took a week of retries to assemble a complete month.
“Very tricky to drink from an ocean of carrier data when they’ve effectively given us a paper straw with no SLA as our access pipe,” he wrote.
That post is the business in miniature. Washington ordered health plans and hospitals to publish their negotiated prices. It did not order them to make the files usable. The gap is where Serif Health lives.
The rule that created the category
The Transparency in Coverage final rule appeared on November 12, 2020 at 85 FR 72158, issued jointly by Treasury, Labor and Health and Human Services. It took effect January 11, 2021, and its file requirements applied to plan years beginning on or after January 1, 2022. Plans must disclose in-network negotiated rates, out-of-network allowed amounts and drug pricing through, in the rule’s own words, “three machine-readable files posted on an internet website.”
A separate rule under section 2718(e) of the Public Health Service Act had already hit hospitals. Since January 2021 each must post a comprehensive file of all standard charges plus a display of at least 300 shoppable services.
Compliance was the problem. The Government Accountability Office counted 1,287 CMS enforcement actions against hospitals from 2021 through 2023, 851 in 2023 alone, producing over $4 million in penalties against 14 hospitals. GAO also found that CMS “does not have assurance that pricing data hospitals report are sufficiently complete and accurate.” Becker’s Hospital Review counted 27 hospitals fined through 2025, that year’s fines running from $32,301 to $309,738.
Then the politics swung. An executive order published February 28, 2025 at 90 FR 11005 was blunt: “Unfortunately, progress on price transparency at the Federal level has stalled since the end of my first term.” It gave the three departments 90 days to require actual prices rather than estimates and to tighten enforcement.
A consultant and an engineer
Rafiq Ahmed advised on healthcare IT, health plans and physician groups at Bain and Company, then ran pricing strategy as a general manager at HotelTonight before Airbnb acquired it. He holds a BA from Yale and an MBA from Harvard Business School, where he was a Baker Scholar.
Matt Robben worked on the Windows kernel and Surface Pro at Microsoft, then Dropbox and Truepic, then led clinical software engineering at One Medical, where his team shipped referrals, orders and e-prescribing. He holds a BS in computer engineering from Northwestern. Neither founder is a clinician. Both spent careers on the plumbing under consumer pricing.
The pivot inside Y Combinator
Serif Health launched in November 2021 planning to sell compliance tools to hospitals. Inside the Winter 2022 Y Combinator batch that plan died. Hospitals said their patient-facing price pages drew a few dozen views a month, and that they already had a compliance vendor they considered good enough.
Robben cites advice from Pilot chief executive Waseem Daher: “build painkillers, not vitamins.” Compliance tooling was a vitamin. Payer contracting was the painkiller. Providers, the founders found, could not calculate their own expected reimbursement from their own contracts.
So they built a benchmarking portal on data they already had, launched it in February 2022, and left the batch with letters of intent from a national surgical center operator, several large physician groups and a telehealth startup. A seed round followed. The early data was poor: through spring 2022 they collected hospital files across ten states and found much of it gappy or missing context.
Four quiet years, then a check
Payer files landed in July 2022 and changed the math. Signal, the flagship platform, launched in 2023. In September 2025 the company published a live public inventory scoring the data quality of every payer network it ingests, an unusual move for a data vendor: it advertises where the source files are broken. A SOC 2 Type II audit with Advantage Partners, monitored through Vanta, closed that November; the report is not public. Signal Ask, a natural language query layer, previewed in May 2026, and a network benchmarking module shipped that July.
On August 20, 2026 SEVA Growth announced a significant minority investment. The founders wrote that they had declined Series A pitches for years, choosing to build a profitable company instead. Their description of the work is the most specific thing either has said about the cost structure: “once you solve one problem in the data, you discover five new data quality issues in the process.”
What is proven, and what is still claimed
| Evidence | What the record shows | Source type |
|---|---|---|
| Transparency in Coverage rule | Final rule, 85 FR 72158, published Nov 12, 2020. Effective Jan 11, 2021; files required for plan years from Jan 1, 2022. | Public record |
| CMS enforcement | 1,287 actions 2021 through 2023, 851 in 2023, over $4M in penalties against 14 hospitals. 27 hospitals fined through 2025. | Public record |
| 2025 executive order | 90 FR 11005, Feb 28, 2025. Ordered actual prices rather than estimates, standardized data and tighter enforcement within 90 days. | Public record |
| Data quality, per GAO | GAO: stakeholders cited inconsistent formats and incomplete data blocking systematic use, and CMS lacks assurance the data are complete and accurate. | Public record |
| Independent compliance measurement | PatientRightsAdvocate.org’s eighth scorecard, September 2026: 49.4 percent of 2,000 hospitals fully compliant, only 18 percent posting dollar prices for half their items. | Independent |
| 2022 SEC filing | May 5, 2022: debt, $4,000,000 offered, $2,020,000 sold, 14 investors, first sale Aug 10, 2021. | Public record |
| 2026 SEC filing | Aug 25, 2026: equity, $5,648,251 offered and sold, 56 investors, first sale Jul 28, 2026. Shalin Mehta added as a director. | Public record |
| Announced versus filed | The August 2026 release calls SEVA “the first outside institutional capital raised by Serif.” The 2022 company post names 1984 Ventures, Olive Tree Capital, Rebel Fund and Y Combinator, and the 2022 Form D records $2,020,000 already sold. | Differs from the record |
| Customer count | More than 200 (Nov 2025), 200 plus (2026 homepage), more than 250 (Aug 2026 release), over 300 (data page). | Company figures disagree |
| Named customers | None in company materials, releases or independent coverage as of Sep 23, 2026. The data page testimonials are unattributed. | Not found |
Read plainly: the market is documented in the Federal Register, and the failure of the underlying data is documented by GAO and by independent scorecards. Serif’s own position in it is not. Every scale figure, every customer count and the profitability claim comes from the company, none of it audited, and the numbers disagree across its own pages. The two Form D filings are the only hard financial facts on the table.
What to watch
- The prescription drug machine readable file rulemaking. Treasury, Labor and HHS issued a request for information in June 2025.
- Whether CMS moves from allowing algorithms and percentages to requiring dollar amounts. That single decision changes how much cleanup work the data needs.
- A named customer. Four years of releases and not one.
- Whether CMS acts on the GAO recommendation to sample files for completeness and accuracy. CMS told GAO it is piloting automated checks.
In their words
“Very tricky to drink from an ocean of carrier data when they’ve effectively given us a paper straw with no SLA as our access pipe.”
Matt Robben, co-founder and CTO, company engineering blog, June 2024 · Company
“Price transparency started as a fight for access. It was about getting the data out into the open,”
Rafiq Ahmed, co-founder and CEO, PR Newswire release, May 28, 2026 · Company release
“For years, network recommendations have been built on average discounts,”
Rafiq Ahmed, PR Newswire release, July 16, 2026 · Company release
“At Serif Health, we think about SOC 2 as a way to consider and mitigate doomsday scenarios,”
Matt Robben, company SOC 2 announcement, November 2025 · Company
“Serif has become the gold standard in healthcare pricing transparency and innovation by providing a critical platform that enables its blue-chip healthcare clients to make fully informed decisions.”
Shalin Mehta, founder and managing partner, SEVA, quoted by Pulse 2.0 and Outsource Accelerator, August 2026 · Investor
Related companies
Sources
- Public recordTransparency in Coverage, final rule, 85 FR 72158
- Public recordMaking America Healthy Again, executive order, 90 FR 11005
- Public recordHospital price transparency enforcement actions
- Public recordHealth Care Transparency, GAO-25-106995
- Public recordForm D, CIK 0001926833
- Public recordForm D, CIK 0001926833
- IndependentHospital price transparency fine enforcement in 2025
- IndependentHospital Price Transparency Compliance Jumped to 49 Percent
- IndependentSEVA Takes Significant Minority Stake
- IndependentSEVA backs price-transparency firm Serif Health
- CompanyAnnouncing Serif Health, YC Winter ’22 Alum
- CompanyAnnouncing our $2.5M seed round
- CompanyMRF Processing Notes, June 2024
- CompanySerif Health Completes SOC 2 Type II Audit
- CompanyGrowth Investment from SEVA
- CompanyGrowth Investment From SEVA
- CompanyAnnouncing Our Live Payer Inventory
- CompanyNetwork Benchmarking launch
- PartnerSerif Health on the Arcadia Marketplace
Profile researched and written by Healthcare Discovery. Last updated September 29, 2026.
