Ann Lillis, ANP
NPI 1609852607 · Adult Health Nurse Practitioner · Williamsville, NY
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ann Lillis, ANP is a Adult Health Nurse Practitioner provider in Williamsville, NY (NPI 1609852607).
Provider details
- NPI number
- 1609852607
- Entity type
- Individual
- Primary specialty
- Adult Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- ANP
- Sex
- Female
- Sole proprietor
- No
- License
- F301173 (NY)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
239 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 152 | $104 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 65 | $73 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 22 | $135 |
Typical Medicare-allowed amounts for these services range $73–$135 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 39 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 533 | 142 |
| Famotidine | 514 | 150 |
| Omeprazole | 473 | 128 |
| Colestipol Hcl | 90 | 24 |
| Linaclotidebrand: Linzess | 88 | 29 |
| Dicyclomine Hcl | 78 | 38 |
| Esomeprazole Magnesium | 56 | 16 |
| Balsalazide Disodium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$4,049 across 192 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-21
- Last updated
- 2013-12-06
Frequently asked questions
- What is Ann Lillis's NPI number?
- Ann Lillis's National Provider Identifier (NPI) is 1609852607, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ann Lillis's specialty?
- Ann Lillis is listed in the NPPES registry with a primary specialty of Adult Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Ann Lillis located?
- Ann Lillis's practice location on file with NPPES is 60 Maple Rd, Williamsville, NY 14221-2917.
- What is Ann Lillis's phone number?
- The practice phone number listed in the NPPES registry for Ann Lillis is (716) 626-5250.
- Does Ann Lillis accept Medicare?
- Ann Lillis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ann Lillis's NPI active?
- Yes — Ann Lillis's NPI (1609852607) is active in the NPPES registry as of the last update on 2013-12-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.