NPPES file of Aug 9, 2026

Alison Lee Mercier, MD

Geriatric Medicine (Family Medicine) Physician · Lancaster, PA

Alison Lee Mercier, MD is a geriatric medicine (family medicine) physician with a practice address in Lancaster, Pennsylvania, and NPI 1811481997, issued on Jun 21, 2018. Check the license (Pennsylvania MD486393, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1811481997
Name
Alison Lee Mercier
Credential
MD
Primary taxonomy
Geriatric Medicine (Family Medicine) Physician 207QG0300X
License number
MD486393 PA
Self-reported in NPPES; status is on the state search
Practice location
2112 Harrisburg Pike, Lancaster, PA 17601
Phone
(802) 999-6433
Enumerated
Jun 21, 2018
Record last updated
Sep 11, 2025
Medicare enrollment
Enrolled (PECOS I20241114000601); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest geriatric medicine (family medicine) physician records → All 134 in Pennsylvania → Look up another NPI →

Also registered at 2112 Harrisburg Pike

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Carly Albright Keller, CRNPFamily Nurse Practitioner1891166427
  2. Farida Aliyeva, CRNPNurse Practitioner1558014076
  3. Paul Allegretti, D.O.Gastroenterology Physician1033231907
  4. Anna Antwi, CRNPFamily Nurse Practitioner1083035190
  5. Ruthanne Ashworth, CRNPFamily Nurse Practitioner1134126881
  6. Terasa Astarita, CRNPAdult Health Nurse Practitioner1275530958

Verify Alison Lee Mercier in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
    Search for license MD486393    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Pennsylvania license search

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49% fewer Medicare Part D claims than the average geriatric medicine (family medicine) physician in 2024

2,688 Medicare Part D claims for 382 beneficiaries, against an average of 5,222 among the 1,271 providers of this specialty who prescribed in Part D. 97 claims were for opioids.

  1. Alison Mercier2,688
  2. Specialty average5,222

Most prescribed

  1. Atorvastatin Calcium146 claims
  2. Amlodipine Besylate118 claims
  3. Lisinopril107 claims
  4. Levothyroxine Sodium97 claims
  5. Metoprolol Succinate70 claims
  6. Omeprazole63 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

One hospital affiliation

  1. Lancaster General HospitalLancaster, PA · Acute Care Hospitals5 of 5 stars

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

Alison Lee Mercier among 134 geriatric medicine (family medicine) physician records in Pennsylvania

Alison Lee Mercier, MD is one of 134 geriatric medicine (family medicine) physician records with a practice address in Pennsylvania. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 85% of them.

  • NPI issued2018 · 85% of these records are older, 12% newer
  • In a Medicare fileYes · 78% of these records are
  • In the CMS Doctors and Clinicians fileYes · 55% of these records are
  • Graduated2018 · median 2004 among the 74 with a school on file
  • Record last updated2025 · 57% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207QG0300X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Geriatric Medicine (Family Medicine) Physician providers in Pennsylvania

There are 134 geriatric medicine (family medicine) physician records in Pennsylvania.

All 134 in Pennsylvania → Every provider in Lancaster → Geriatric Medicine (Family Medicine) Physician nationwide →

The 8 geriatric medicine (family medicine) physician records with the nearest ZIP codes

  1. Robert Howse, MDLancaster, PA 176011245295229
  2. Dale Hursh, MDLancaster, PA 176011831154178
  3. Leon Kraybill, MDLancaster, PA 176011215992201
  4. Laura Moyer, MDLancaster, PA 176011477765568
  5. Saba QadirLancaster, PA 176011871086835
  6. Neelofer Sohail, MDLancaster, PA 176011265497820
  7. Kelly Stauffer, CRNPLancaster, PA 176011689488702
  8. Matthew Beelen, MDLancaster, PA 176021770548216

Common questions

What is Alison Lee Mercier, MD's NPI number?

Alison Lee Mercier, MD's National Provider Identifier (NPI) is 1811481997, issued on Jun 21, 2018. An NPI identifies a provider in billing; it is not a license.

Where is Alison Lee Mercier, MD located?

The NPPES record lists a practice address at 2112 Harrisburg Pike, Lancaster, PA, 17601. Phone: (802) 999-6433. Providers update this record themselves, so call before visiting.

How can I verify Alison Lee Mercier, MD's license?

NPPES lists Pennsylvania license number MD486393, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Alison Lee Mercier, MD prescribe under Medicare Part D?

In 2024, Alison Lee Mercier, MD had 2,688 Medicare Part D claims for 382 beneficiaries; the average among geriatric medicine (family medicine) physician prescribers was 5,222. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.