Alison Mercier, MD
NPI 1811481997 · Geriatric Medicine (Family Medicine) Physician · Lancaster, PA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alison Mercier, MD is a Geriatric Medicine (Family Medicine) Physician provider in Lancaster, PA (NPI 1811481997).
Provider details
- NPI number
- 1811481997
- Entity type
- Individual
- Primary specialty
- Geriatric Medicine (Family Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- MD486393 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
7 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
499 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 182 | $93 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 114 | $102 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 70 | $66 |
| Subsequent Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, at Least 45 Minutes99310 | 47 | $146 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 26 | $142 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent Visit |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 68 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 146 | 56 |
| Amlodipine Besylate | 118 | 32 |
| Lisinopril | 107 | 38 |
| Levothyroxine Sodium | 97 | 32 |
| Metoprolol Succinate | 70 | 19 |
| Omeprazole | 63 | 24 |
| Losartan Potassium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-06-21
- Last updated
- 2025-09-11
- Certified
- 2024-11-04
Frequently asked questions
- What is Alison Mercier's NPI number?
- Alison Mercier's National Provider Identifier (NPI) is 1811481997, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alison Mercier's specialty?
- Alison Mercier is listed in the NPPES registry with a primary specialty of Geriatric Medicine (Family Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Alison Mercier located?
- Alison Mercier's practice location on file with NPPES is 2112 Harrisburg Pike, Lancaster, PA 17601-2644.
- What is Alison Mercier's phone number?
- The practice phone number listed in the NPPES registry for Alison Mercier is (802) 999-6433.
- Does Alison Mercier accept Medicare?
- Alison Mercier is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alison Mercier's NPI active?
- Yes — Alison Mercier's NPI (1811481997) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.