How to Get Credentialed with NY Medicaid & eMedNY: A Step-by-Step Guide

eMedNY catches even experienced providers off guard. This guide walks through exactly what to submit — and how to avoid the 60–90 day delays we see most often with Hudson Valley and Westchester practices.

What Is eMedNY and Why It Matters

eMedNY is New York State's Medicaid claims processing system. Before billing a single Medicaid patient, both the practice (NPI Type 2) and every individual provider (NPI Type 1) must be separately enrolled. Being credentialed with commercial payers like Aetna or United Healthcare does not automatically enroll you in eMedNY — it's a completely separate process.

For practices in Westchester, Dutchess, and Rockland Counties, Medicaid patients — including those enrolled in managed care organizations like Healthfirst, Fidelis Care, and MetroPlus — represent a significant portion of patient volume.

Step-by-Step: The eMedNY Enrollment Process

1. 1
   Confirm your NPIs are active in NPPES. eMedNY cross-references NPPES — any discrepancy in name, address, or tax ID triggers an automatic rejection.
2. 2
   Complete and attest your CAQH profile. NY Medicaid uses CAQH as a primary data source. Attestation must be current (within 120 days) before submitting the eMedNY application.
3. 3
   Submit via the eProviderEnrollment portal. Go to emednyprovider.emedny.org. Select your provider type carefully — wrong selection is a leading cause of rejection. Gather: DEA certificate, medical license, malpractice insurance, W-9/EIN, and practice location documentation.
4. 4
   Mail your notarized Transaction Agreement. This is NY Medicaid's data sharing agreement. It must be printed, signed, notarized, and mailed by postal mail. Electronic or faxed submissions are silently rejected.
5. 5
   Respond immediately to any documentation requests. eMedNY sends requests via mail with a 10-business-day response window. Missing a deadline resets the clock and can add 30–60 days to your timeline.

Don't Forget: Managed Care Enrollment Is Separate

eMedNY enrollment covers fee-for-service Medicaid only. Most Medicaid patients in New York are enrolled in managed care organizations (MCOs) that each require a separate credentialing application: Healthfirst, MetroPlus, Fidelis Care, United Healthcare Community Plan, and Molina Healthcare of New York. Being in eMedNY does not enroll you with any of these plans.

Telehealth Billing for Mental Health in New York: POS Codes, Modifiers & 2026 Updates

New York's telehealth parity law covers mental health services, but billing them correctly requires the right combination of place-of-service codes, modifiers, and payer-specific rules — or your claims will be denied.

New York Telehealth Parity — What It Means for Billing

New York's telehealth parity law requires commercial insurers to reimburse telehealth mental health services at the same rate as in-person services. However, correctly billing those services is not automatic — each payer has specific requirements for place-of-service (POS) codes and modifiers that, if wrong, result in full denials rather than downcoding.

POS Codes: 02 vs. 10

This is where most behavioral health practices make their first mistake. As of 2022, CMS introduced POS 10 for telehealth services provided when the patient is in their home. POS 02 is now reserved for telehealth where the patient is at a healthcare facility. For the vast majority of teletherapy sessions, POS 10 is correct. Using 02 when the patient is home will result in denials from Medicare and most commercial payers.

Modifiers: GT vs. 95 vs. Neither

• Modifier 95 — Required by most commercial payers (Aetna, BCBS, United) for synchronous telehealth. This is the standard modifier for most NY behavioral health telehealth billing in 2026.
• Modifier GT — Used for Medicare Advantage plans that still follow older guidelines. Check each plan's billing manual — some still require GT.
• No modifier — A small number of NY Medicaid managed care plans (notably some MetroPlus products) do not require a telehealth modifier. Adding one incorrectly can cause a denial.

Common CPT Codes for NY Telehealth Mental Health

• 90837 — Individual psychotherapy, 60 min (highest volume, highest reimbursement)
• 90834 — Individual psychotherapy, 45 min
• 90832 — Individual psychotherapy, 30 min
• 90847 — Family therapy with patient present
• 90853 — Group therapy (limited telehealth coverage — verify per payer)
• 90791 — Psychiatric diagnostic evaluation

The 8-Minute Rule for PT Billing: Maximize Timed Units Without Compliance Risk

Misapplying the 8-minute rule is one of the most common ways PT practices leave money on the table — or worse, overbill. Here's the correct calculation method for timed PT codes billed to Medicare and commercial payers.

What Is the 8-Minute Rule?

The 8-minute rule, established by CMS for Medicare, determines how many billable units a PT can claim for timed CPT codes. A provider must provide at least 8 minutes of a timed service to bill one unit, and each additional unit requires an additional 15 minutes of service. The rule applies to all timed codes — 97110, 97140, 97530, 97112, and others.

The Unit Calculation: How It Actually Works

Total the minutes of all timed services provided in the session, then apply this scale:

• 8–22 minutes = 1 unit
• 23–37 minutes = 2 units
• 38–52 minutes = 3 units
• 53–67 minutes = 4 units
• 68–82 minutes = 5 units

The key point: you total all timed minutes first, then calculate units. You do not calculate units per procedure individually. A common billing error is applying the rule to each individual CPT code, which routinely results in underbilling.

Medicare vs. Commercial Payers

The 8-minute rule is a Medicare rule. Most commercial payers in New York follow similar guidelines, but not all. Aetna, United Healthcare, and BCBS generally follow the same 8-minute framework. Some Medicaid managed care plans may have slightly different thresholds — always verify with each payer's PT billing manual before assuming universal application.

Top 5 Reasons EmblemHealth Denies Claims — and How NY Practices Can Fix Them

EmblemHealth covers over 3 million New Yorkers and is one of the most commonly billed payers across Westchester, Dutchess, and NYC. It's also one of the most frequent sources of denials we reverse for local practices. Here's what's actually causing them.

Why EmblemHealth Denials Are Different

EmblemHealth includes HIP and GHI product lines, each with slightly different claims processing rules. A claim that passes for one product may deny under another — even for the same patient. Many practices don't realize they're billing a GHI patient with HIP rules until after denial.

The 5 Most Common Denial Patterns

1. 1
   Coordination of benefits (COB) not updated. EmblemHealth frequently denies when their records show a patient has another active primary insurance. The fix: verify COB status at every visit for patients with dual coverage.
2. 2
   Prior authorization not obtained or expired. EmblemHealth requires prior auth for most specialist services, outpatient procedures, and many behavioral health sessions. Even one missed renewal triggers a full denial with no reimbursement.
3. 3
   Telehealth POS or modifier error. As discussed in our telehealth billing guide, EmblemHealth requires POS 10 + modifier 95 for outpatient telehealth. POS 02 results in remark code N257 denial.
4. 4
   Wrong rendering vs. billing NPI on the claim. If the rendering provider's NPI doesn't match EmblemHealth's credentialed provider file, the claim is denied for "provider not eligible." This is especially common after adding new providers.
5. 5
   Timely filing deadline missed. EmblemHealth's timely filing limit is 90 days from date of service for most products. Missing this window forfeits the claim entirely — no appeal option.

What Is a Clean Claim Rate — and Why 98% Should Be Your Minimum Target

Your clean claim rate is the single best indicator of billing health. Here's how to measure it, benchmark against NY standards, and close the gap if you're underperforming.

Defining Clean Claim Rate

A "clean claim" is a claim accepted for processing on first submission with no errors, missing information, or payer edits. Your clean claim rate is the percentage of all claims submitted that are clean on first pass. The national average is around 75%. Best-in-class billing operations — including Xpert Billing — achieve 97–99%.

Every dirty claim costs you time (staff hours to rework), money (delayed cash flow and write-offs), and sometimes the claim entirely (if timely filing lapses during rework).

How to Calculate Yours

Divide the number of claims accepted without edits on first submission by total claims submitted, multiply by 100. If your practice management system doesn't report this directly, pull 90-day denial reports from your clearinghouse and calculate the ratio manually.

The Most Common Reasons NY Practices Fall Below 95%

• Patient eligibility not verified before the visit (leads to COB and coverage errors)
• ICD-10 codes not linked to the correct CPT codes (medical necessity failures)
• Missing or wrong prior authorization numbers on claims
• Rendering provider NPI not credentialed with the billed payer
• Outdated fee schedules causing modifier or procedure mismatches

Cardiology Billing Modifiers: -26, -TC, and Global Period Rules NY Practices Get Wrong

Professional vs. technical component billing is one of the costliest error categories in cardiology. Here's how to apply modifier -26 and -TC correctly for echocardiograms, stress tests, and nuclear imaging in New York.

The -26 and -TC Split: When Each Applies

When a cardiologist performs both the technical component (equipment, supplies, technician) and the professional component (interpretation and report) of a diagnostic procedure, they bill the global code — no modifier. When these components are split between a hospital or imaging facility (TC) and a physician (professional component), each party bills their portion with the appropriate modifier.

• Modifier -26 — Professional component only (physician's interpretation). Used when the cardiologist interprets a test performed at a facility they don't own.
• Modifier -TC — Technical component only (equipment and staff). Used when the facility bills for the equipment and technician but not the interpretation.

Common Cardiology Codes Where This Matters

• 93306 — Echocardiography, transthoracic (complete) — most commonly split-billed in Westchester hospital-affiliated cardiology groups
• 93015 — Cardiovascular stress test — global code when physician and facility are the same entity
• 78452 — Nuclear cardiology myocardial perfusion imaging — almost always requires modifier split in NY hospital outpatient settings

Global Period Rules: 0-Day vs. 10-Day vs. 90-Day

Procedures with assigned global periods restrict what can be billed separately in the post-operative window. Most diagnostic cardiology procedures are 0-day global (same-day E/M may require modifier -25 if a separately identifiable service was performed). Interventional cardiology procedures like stent placements carry a 90-day global — billing a follow-up E/M within 90 days without modifier -24 will be denied as bundled.

Dermatology Excision & Destruction Billing: CPT Code Pitfalls for Westchester Practices

Excision and destruction codes require precise documentation of lesion size, margins, and benign vs. malignant classification. A single documentation error can mean billing the wrong code range — and losing the full reimbursement.

Excision Codes: The Size Rule

Excision codes (11400–11646) are selected based on the excised diameter — the lesion size including the narrowest margins. The common mistake is documenting the lesion diameter without the margins, which leads to under-coding. For benign lesions (11400–11471) and malignant lesions (11600–11646), the code ranges are:

• 0.5 cm or less
• 0.6–1.0 cm
• 1.1–2.0 cm
• 2.1–3.0 cm
• 3.1–4.0 cm, and over 4.0 cm

Each range has a different code for trunk/arms/legs vs. scalp/neck/hands/feet/genitalia. The anatomic location matters as much as size.

Destruction Codes: Benign vs. Premalignant

Destruction codes 17000–17004 cover premalignant lesions (actinic keratoses). Code 17000 covers the first lesion, 17003 covers each additional lesion (2nd through 14th), and 17004 covers 15 or more lesions. These are frequently billed as a block when they should each be itemized — triggering bundling denials.

Destruction of benign lesions uses codes 17110–17111. The key documentation requirement: you must specify the lesion type, location, size, and method of destruction. Vague notes like "destruction of skin lesion" without specifics will result in downcoding or denial.

Adding a New Provider to Your Westchester Practice: Credentialing Timeline & Checklist

Bringing on a new NP, PA, or associate MD? Here's a realistic credentialing timeline for New York commercial payers and what you can do to prevent the most common delays that leave new hires unable to bill.

Realistic Timelines by Payer Type

• Medicare (PECOS): 30–60 days with a complete application
• NY Medicaid (eMedNY): 45–90 days
• Major commercial payers (Aetna, BCBS, United): 60–120 days
• EmblemHealth, MetroPlus, Healthfirst: 60–120 days
• Re-credentialing (existing payer relationships): 30–60 days

The New Provider Credentialing Checklist

1. 1
   NPI Type 1 confirmed active in NPPES — verify address and taxonomy codes are current
2. 2
   CAQH profile created or updated — attestation current within 120 days
3. 3
   All licenses and certifications uploaded — medical license, DEA, board certifications, malpractice
4. 4
   Malpractice insurance certificate issued in the provider's name (not just the group)
5. 5
   PECOS enrollment submitted for Medicare if billing Medicare patients
6. 6
   Commercial payer applications submitted for every payer the provider will bill
7. 7
   Billing system updated with new provider's NPI as rendering provider on all applicable claims

SUD & MAT Billing in New York: How to Bill Substance Use Disorder Treatment Correctly

Substance use disorder billing in NY involves unique H-codes, HCPCS modifiers, and eMedNY prior authorization requirements. Billing errors here result in full claim denials, not partial reimbursements.

The Difference Between SUD Billing and Standard Mental Health Billing

Standard outpatient mental health billing uses CPT codes (90832–90837, 90791, etc.) and bills to commercial payers and Medicare like most medical services. SUD billing, particularly for Medicaid-funded programs, often requires HCPCS H-codes that are specific to substance use disorder services and recognized by NY Medicaid (eMedNY) but not by most commercial payers.

Key H-Codes for NY SUD Programs

• H0001 — Alcohol and/or drug assessment
• H0004 — Behavioral health counseling and therapy, per 15 minutes
• H0005 — Alcohol and/or drug services; group counseling by a clinician
• H0015 — Alcohol and/or drug services; intensive outpatient (IOP) — 3-hour minimum block
• H2036 — Alcohol and/or drug treatment program, per diem

MAT Billing: Medication-Assisted Treatment

For practices providing MAT (buprenorphine/Suboxone, naltrexone, methadone), billing combines office visit E/M codes with drug administration codes. Buprenorphine prescribing by office-based providers bills the E/M as usual. Methadone treatment at an OTP (Opioid Treatment Program) uses a per-diem bundled code (H0020) and requires specific SAMHSA certification and eMedNY OTP enrollment — a separate process from standard Medicaid enrollment.

Should You Outsource Medical Billing? 7 Signs Your NY Practice Is Ready

Many practices wait too long to outsource billing — by which point they've lost months of revenue to aging A/R, staff burnout, and missed appeals windows. Here are the seven warning signs that it's time.

The 7 Warning Signs

1. 1
   Your A/R days are over 30. The national benchmark is 40 days, but best-in-class billing gets this under 20. If your days in A/R are climbing, cash flow problems are coming.
2. 2
   Your clean claim rate is under 90%. One in ten claims failing first-pass means you're paying staff to rework claims that should have been clean the first time.
3. 3
   You're not appealing denials. Most practices appeal fewer than 40% of denied claims — leaving significant money on the table. If appeals aren't tracked systematically, revenue walks out the door.
4. 4
   Your billing staff turnover is high. In-house billing is staff-dependent. One resignation can put months of claims processing at risk during the hiring and training gap.
5. 5
   You're not keeping up with payer rule changes. NY payers update their coding policies, authorization requirements, and fee schedules continuously. Practices billing on 2023 rules in 2026 are leaving money on every claim.
6. 6
   Your provider is spending time on billing questions. If your physicians are reviewing denials, answering billing staff questions, or chasing A/R reports, that's clinical revenue being diverted to administrative work.
7. 7
   You've never had a billing audit. Practices that don't audit their billing performance have no visibility into what they're losing. If you don't know your denial rate, your clean claim rate, or your collection ratio, you have a visibility problem that will cost you.