Practice management systems, EHRs, payer portals and the X12 transactions between them, written for engineers.
Idempotency keys, duplicate detection, systems with no update endpoint, and how to confirm a write landed in a practice management system.
Claims dataThe 837P loops a practice management system fills, the fields that cause rejections, and how to read the 999 and 277CA that come back.
Vendor APIsTebra's SOAP API: how access works, which patient, appointment, encounter and charge operations exist, the rate limits, and the gaps.
Vendor APIsHow a server-side app gets an eClinicalWorks FHIR R4 token with a signed RS384 JWT, and what that token can read.
Integration opsHow Availity, UnitedHealthcare, Aetna and state Medicaid portals handle logins, second factors and sessions, and which data lives only in the portal.
Claims dataHow to parse an 835 remittance advice, read CAS adjustments and PLB segments, and match payments back to claims in the practice management system.
Vendor APIsWhat practices and vendors do when a practice management system such as Office Ally Practice Mate publishes no general API, and the tradeoffs.
Vendor APIsNextGen Enterprise and NextGen Office FHIR R4 endpoints, partner programs, fees and rate limits as stated on NextGen's public API pages.
Integration opsWhat 45 CFR Part 171 and the Cures Act require of certified health IT vendors for APIs, with the Infeasibility and Manner exceptions explained.
Vendor APIsHow to find open slots and book a visit through healow for an eClinicalWorks practice, and what the public documentation leaves out.
Claims dataWhat US Core FHIR gives a billing startup, what the vendor's own APIs add, and why most teams end up reading both.
Claims dataWhat a 270/271, a payer portal and the EHR's built-in check each return, where the results differ, and how to store them.
Integration opsWhich EHR and PM vendors publish a sandbox, what a sandbox leaves out, and how to test an integration before the first customer connects.
Vendor APIsWhat an engineer meets when integrating with the eClinicalWorks FHIR R4 API, why the behavior differs from the documentation, and an open source client that encodes what we learned.
Integration opsHow to catch an EHR vendor change in minutes with schema checks, canary accounts and per-connector alerts, and roll a fix without downtime.
Integration opsA design for collecting, storing, re-authenticating and logging customer EHR and payer portal credentials without your product seeing the password.
Claims dataHow the 276/277 claim status transaction works, what the category and status codes mean, and what to do when the answer is thin.
Integration opsWhat each EHR connector contains, the maintenance vendors impose, the partner fees vendors publish, and when a startup should build its own.
Vendor APIsWhat the athenahealth developer docs say about the Preview sandbox, practice-level enablement, Marketplace contracting and the Claim API.
Vendor APIsHow AdvancedMD grants API access, what its Connect and FHIR APIs expose, where writes are allowed, and what the public pages do not say.