The writing

Cornerstones

Not articles. Arguments. Each one names a leak, shows the mechanism, and gives you the number to run on your own practice.

A Patient's Linked Dental Claim Just Got Denied. What Do You Actually Hand Them? When a Medicare-linked dental claim is denied and the patient asks what to do next, the practice's job is a referral, not an appeal script. CheckMyDenial's guide walks a patient through reading the denial and understanding their appeal rights in plain language, built for the patient side of this exact scenario. Mar 1, 2027
An Audit That Only Finds Under-Billed Money Is Not a Compliance Program. It Is a Liability Sitting Next to a Recovery Check. The overpayment statute, 42 U.S.C. 1320a-7k(d), requires reporting and returning any overpayment within 60 days of identification, with False Claims Act exposure for missing that deadline. A billing review built only to find missed revenue, and never structured to surface over-coded claims in the same pass, creates the exposure it should be closing. Feb 22, 2027
If You Opted Out of Medicare, What Can Your Medicare Patients Actually Do? The Private Contract Rules, Read Straight. A dentist who opts out of Medicare signs a two-year affidavit under 42 CFR 405.405-405.420 and can only see Medicare beneficiaries through a private contract meeting 405.415. Once that contract is in place, no Medicare payment is made for the service, directly or indirectly, even if the patient files the claim themselves. Feb 15, 2027
Your Patients' Medicare Numbers Are in the Chart, Not in the Insurance Module In one de-identified practice audit, current Medicare Beneficiary Identifiers were sitting in scanned card images the whole time, while the insurance module held retired pre-2020 HICNs. CMS made the MBI mandatory on claims for dates of service on or after January 1, 2020. A stale number in the plan record does not mean the current one is missing. Jan 4, 2027
You Found You Were Overpaid. The 60-Day Clock Started the Moment You Knew, Not the Moment You Act. 42 CFR 401.305 requires an overpayment to be reported and returned within 60 days of identification, defined as when a person knowingly receives or retains it. The clock starts at identification, not at a decision to look into it, which is why an audit built only to find money owed to the practice misses the exposure running the other direction. Dec 21, 2026
Noridian JE's Dental Billing Article, Read Clause by Clause. What It Actually Requires and What It Only Encourages. Noridian, the Medicare Administrative Contractor for Jurisdiction E, publishes the operating rules dental practices in California, Hawaii, and Nevada bill against. The article names the exact diagnosis code, KX modifier, and claim form requirements, and the dates each one became mandatory rather than encouraged. Most practices have never read the source page. Dec 14, 2026
Medicare Advantage Dental Is a Supplemental Benefit, Not the Coverage Rule. Practices Route Claims to the Wrong Desk Because of the Difference. 42 CFR 422.101 sets the basic benefits an MA plan must cover, the Part A and Part B services original Medicare covers. Dental is not in that basic set. Extra dental benefits live under 422.102 as mandatory or optional supplemental benefits, billed on a separate track from any medically necessary dental claim tied to a covered medical condition. Dec 7, 2026
85 Percent of Never-Billed Dental Work Traces to One Field: No Insurance Plan on the Patient In one de-identified practice audit, 85 percent of the never-billed work came from patients with no insurance plan attached in Open Dental, not from missing payer expertise. The practice's own report could see only 3.4 percent of that work by dollar value. It is an intake-hygiene defect, and it hides itself from the reports built to catch it. Nov 30, 2026
837D or 837P? Where a Medically Linked Dental Claim Actually Has to Go Since January 1, 2025, CMS requires ICD-10-CM diagnosis codes on dental claims filed on the 837D or the 2024 ADA paper form. A CPT-coded service tied to the same case, such as an E/M consult, routes on the 837P instead. Filing the wrong half on the wrong form is its own denial reason, separate from medical necessity. Nov 23, 2026
Anesthesia, X-Rays, and OR Time on a Covered Dental Case: When Do They Get Paid? When a dental service qualifies as inextricably linked under 42 CFR 411.15(i)(3)(i), the ancillary services around it, anesthesia administration, diagnostic x-rays, and operating room use, are not excluded either, under 411.15(i)(3)(ii). On a cash surgical case those ancillaries are often a large share of what the patient paid, and practices routinely leave that share unfiled. Nov 16, 2026
Are You Defaulting Every Consult to 99213? The 2021 E/M Rule Says Check the Level. Since January 1, 2021, CPT office and outpatient E/M codes 99202-99215 are leveled by medical decision making alone or by total time on the date of encounter, not history and exam. A level-2 established visit runs 10 to 19 minutes; a level-5 runs 40 to 54. A practice defaulting to one mid-level code on every oral surgery consult is very likely under-billing some of them. Nov 9, 2026
The ICD-10 Codes That Tell You a Chart Might Belong in the Medical Lane Nine ICD-10-CM code families, including C00-C14, C41.1, C81-C96, N18, Z94, Z95.2-4, Z51.0-1, T66, and D61, are the screening signals for a chart review under 42 CFR 411.15(i)(3), the regulation that lets certain dental services cross to Medicare Part B. They are signals to pull a chart, not billing instructions. Nov 2, 2026
What Documented Care Coordination Actually Looks Like in the Chart. Medicare requires an exchange of information or a referral between the medical provider and the dentist before a claim can be paid under 42 CFR 411.15(i)(3). Four elements make the coordination provable: the referral, the exam finding, the treatment-plan linkage, and the clearance letter. Missing any one of them, the claim has no documented link to stand on. Oct 26, 2026
What It Actually Takes for a Dentist to Enroll in Medicare, and When It Is Worth It. An individual dentist enrolls in Medicare using form CMS-855I through PECOS; a practice entity enrolls separately using CMS-855B. Opting out instead requires an affidavit under 42 CFR 405.420 that locks in a 2-year term under 42 CFR 405.400. The choice determines whether a practice can bill 42 CFR 411.15(i)(3) claims at all. Oct 19, 2026
Who Actually Billed Medicare for Dental Work in 2024, and For What. 629 providers nationally billed Medicare Part B for dental or oral-maxillofacial services in 2024, split 166 dentists and 463 oral surgeons, for $8.3M paid. The top 100 collected 74.6% of it. The median provider collected $3,118. Oct 12, 2026
How Much of Your Unbilled Work Dies Every Month? The 12-Month Clock on Dental Medicare Claims. Medicare claims must be filed within 1 calendar year of the date of service under 42 CFR 424.44(a). Miss it and the claim is not just denied, it carries no appeal rights. A practice sitting on six months of unbilled linked-dental cases has already lost the oldest of them, whether anyone has noticed or not. Oct 5, 2026
Reopening or Redetermination: Which One Fixes a Wrong Modifier on a Dental Medicare Claim A reopening corrects a clerical error within one year of the initial determination, no appeal required. A redetermination is a formal first-level appeal with a 120-day deadline. Noridian JE excludes nine modifiers, AQ, CR, GA, GY, GX, 22, 23, 66, and 74, from self-service reopening. KX is not on that list. Sep 28, 2026
How a Dentist Actually Enrolls in Medicare: The ADA's Own Steps, Form by Form. The ADA frames Medicare enrollment as one decision with three paths: participating provider, non-participating provider, or opt-out. Each path has its own step-by-step form sequence through PECOS, and since January 2024 a self-designated specialty code from CMS Transmittal R12231CP is part of the 855I itself. Sep 26, 2026
Why E/M Claims With Modifier 25 Deny on Surgical Days, and When 57 Is the Right Modifier Modifier 25 covers a significant, separately identifiable E/M service on the same day as a minor procedure with a 0 or 10-day global period. Modifier 57 covers the E/M visit that leads to the decision for a major procedure with a 90-day global period. Using 25 on a major-procedure day is why the claim denies. Sep 21, 2026
Why Bill Medical Insurance for Dental Work at All? The Seam Between Dental and Medical, Explained. A narrow, codified rule at 42 CFR 411.15(i)(3) lets Medicare Part B pay for dental care that is inextricably linked to a covered medical condition, at the medical rate, not the dental one. Only 629 providers, 166 general dentists and 463 oral surgeons, billed Part B in all of CY2024. The reason is not that the rule is rare. It is that almost nobody has read it. Sep 19, 2026
What July 1, 2025 Changed for Dental Claims Billed to Medicare Beginning July 1, 2025, the KX modifier became mandatory on Medicare dental claims filed under the inextricably linked pathway, alongside a required ICD-10 diagnosis code. A claim missing either one is now wrong on its face, and MACs may deny it as statutorily non-covered rather than reviewing it on the merits. Sep 14, 2026
Your Fee Schedule Can Change Mid-Contract. California Law Gives You 45 Business Days to See It Coming. California requires dental insurers to give at least 45 business days' written notice before a material change to a provider contract's claims-adjudication system, coverage policies, or fee-affecting rules takes effect, with the right to terminate before it does. Insurance Code Section 10133.65 defines what counts as material and voids any contract clause that tries to shorten it. Sep 10, 2026
CAQH Is Now DataSpring, Owned by the Payers Who Pay Your Claims. The 120-Day Attestation Clock Did Not Change. In June 2026 CAQH rebranded as DataSpring after a January 2026 shift from nonprofit to for-profit ownership by 12 health-plan-affiliated shareholders. The Provider Data Portal (formerly ProView) still requires re-attestation every 120 days, 180 for Illinois, or the profile status changes to Expired. Sep 9, 2026
Your Deposit and Your Remittance Are Supposed to Match Themselves. A Federal Rule Says How. A dental practice's EFT deposit and its 835 remittance are meant to reassociate automatically through a shared trace number. A federal operating rule, CAQH CORE 370, adopted at 45 CFR 162.1603 effective January 1, 2014, defines exactly how that matching is supposed to work, and what breaks when a bank or clearinghouse drops the data. Sep 8, 2026
Your PPO Discount Is Being Taken by a Payer You've Never Contracted With. 18 States Now Make Them Tell You. A dental PPO network contract can be leased or sold to a third-party payer, letting that unrelated company pay you at your negotiated discount without a direct contract. California's AB 954 (Cal. Ins. Code Section 10120.4, effective January 1, 2020) and an NCOIL model act adopted with opt-out rights in at least 18 states now require disclosure. Sep 7, 2026
Why Open Dental's Procedures Not Billed to Ins Report Under-Counts Your Real Number Open Dental's Procedures Not Billed to Ins report lists a procedure only if it has a fee, an active plan, and no do-not-bill flag. In one de-identified 12-month audit, it surfaced 3.4 percent of the never-billed work by dollar value. The other 96.6 percent was real, completed work the report cannot display. Sep 7, 2026
Diabetes Almost Made the Inextricably Linked List for 2026. It Did Not. CMS received seven public submissions asking to add new clinical scenarios to the inextricably linked dental coverage pathway for CY 2026. The largest cluster proposed diabetes mellitus, citing the link between dental infection and diabetic retinopathy and nephropathy. CMS adopted none of them, deferring all seven to future rulemaking. Sep 6, 2026
Dental Eligibility Verification Spending Hit $2.1 Billion in 2023. The Federal Standard That Was Supposed to Automate It Has Existed for Over a Decade. The X12 270/271 eligibility transaction is the HIPAA-mandated standard, codified at 45 CFR 162.1202, for checking a patient's dental coverage electronically. Despite that standard, U.S. dental practices spent $2.1 billion on eligibility and benefit verification in 2023, up 15 percent, because the CAQH Index found the automated response is often not detailed enough to trust. Sep 5, 2026
The Denial Code on a Dental Remittance Isn't Payer Discretion. A Federal Rule Defines What It Can Say. A dental remittance's denial code is not random. X12 maintains the Claim Adjustment Reason Code and Remittance Advice Remark Code lists, updated three times a year. A federal operating rule, CAQH CORE 360, requires payers, including Medicare, to use only a defined, limited set of code combinations for specific business scenarios. Sep 4, 2026
The Dialysis Dental Workflow That Did Not Exist Before 2025. 42 CFR 411.15(i)(3)(F) added ESRD and dialysis to Medicare's inextricably linked dental coverage in the CY 2025 Physician Fee Schedule final rule, effective January 1, 2025. Nearly 555,000 Americans are on dialysis, per the USRDS Annual Data Report. Almost none have had a linked dental claim filed, because the coverage itself is new. Sep 3, 2026
The Head and Neck Cancer Dental Workflow. Before Treatment and After. 42 CFR 411.15(i)(3)(E) is the only subparagraph that covers dental complications after treatment, not just before it. For head and neck cancer, Medicare Part B can pay for pre-treatment infection clearance and for post-treatment complications like osteoradionecrosis, provided the radiation oncology team and the dentist coordinate and document the link. Sep 3, 2026
The Transplant Clearance Workflow. Referral to Remittance, Step by Step. Medicare Part B pays for dental infection clearance tied to an organ, stem cell, or bone marrow transplant, codified at 42 CFR 411.15(i)(3)(A). This is the six-step workflow, from the transplant team's referral through the clearance note, KX modifier, ICD-10 code, and 837D claim, that turns a routine pre-transplant exam into a billable medical claim. Sep 3, 2026
Why Dental Claim Status Is Still a Phone Call: 36 Percent Manual vs 2 Percent for Medical The 2024 CAQH Index found 36 percent of dental claim status inquiries were conducted fully manually, by phone, mail, fax, or email, versus 2 percent for medical. Dental electronic adoption held flat at 28 percent while medical reached 80 percent. The gap costs the dental industry hundreds of millions a year. Sep 2, 2026
CPT 21215 Carries $4.3 Million and One Coverage Policy. Should You Bill It? CPT 21215, mandible bone graft, drew $4,338,970 from 35 billers in 2024 CMS Part B data, a large concentration for one code. It sits in a single Medicare contractor's limited-coverage policy, with a 674-diagnosis trauma-and-cancer whitelist and automatic denial for anything outside it. Sep 2, 2026
Crowns, Bridges, and Abutments: What 42 CFR 411.15(i)(3) Does Not Say Only subparagraph (B) of 42 CFR 411.15(i)(3) reaches restorative dental work, and only for ridge reconstruction performed at the same time as tumor resection. No subpart names crowns, bridges, or abutments. A cancer diagnosis alone does not make restorative work billable to Medicare Part B. Aug 25, 2026
The Conditions That Turn a Dental Claim Into a Medical One. A Checklist You Can Run at the Chair. Medicare Part B pays for dental care that is inextricably linked to a covered medical condition. The codified scenarios include transplant, cardiac valve replacement, cancer treatment, dialysis and ESRD, and head and neck cancer, and the rule states this list is not exhaustive. If one of these is in a patient's chart and you billed the necessary portion at the dental rate, you filed the wrong lane. Jul 16, 2026
The Same Tooth Can Bill at Two Different Rates. Almost No Practice Knows the Second One. The same dental procedure can be paid at a low dental rate or a much higher medical rate, and which one you get depends on why the work was done, not what was done. When a qualifying medical condition makes the care medically necessary, the necessary portion can cross to the medical rate. Most practices only know the dental lane, so they never file the second one. Jul 16, 2026
The After-Hours Revenue Leak: The Money That Walks Out Before Anyone Picks Up the Phone The single largest source of preventable revenue loss in most dental practices is the patient who called after hours, got voicemail, and booked somewhere else. It never shows up on your P&L because you never see the patient you lost. Here is the mechanism, and the four numbers to pull from your own practice to size it. Jul 9, 2026
Denied Claims Win on Appeal Far More Often Than Practices Fight Them. Here Is Why. In the most rigorously audited corner of health insurance, three out of four denied claims were overturned when someone actually appealed, and almost nobody appealed. Dental runs on the same incentive. It is not a billing problem. It is a business model, working as designed, and it depends on your front desk being too busy to push back. Jul 9, 2026
The Five Numbers That Predict Whether Your Practice Will Hit $1M Most $500K practices and most $1M practices look identical from the outside. Same team, same chairs, same software. The durable difference is five specific numbers, not the six on your dashboard, that leak silently while your software reports everything is fine. This is the diagnostic, with the operator detail and the math on each one. Jul 9, 2026