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ALISON LEE MERCIER MD
NPI 1811481997
Family Medicine - Geriatric Medicine in Lancaster, PA

Active since June 21, 2018PECOS EnrolledAccepts Medicare Assignment
2112 HARRISBURG PIKE, STE 312, LANCASTER, PA 17601(802) 999-6433 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Sep 11, 2025, Nov 4, 2024, Aug 8, 2022 and 1 more (4 updates tracked since 2018).

About Alison Lee Mercier Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ALISON LEE MERCIER MD (NPI 1811481997) is an individual geriatric medicine provider in Lancaster, Pennsylvania, licensed in Pennsylvania (MD486393) and active in the NPI registry since June 2018. She is enrolled in Medicare PECOS, is affiliated with Lancaster General Hospital, and is a graduate of Other (2018).

NPPES Registry Identity

NPI1811481997
Entity TypeIndividualFemale
Primary Taxonomy207QG0300X
Provider Legal NameALISON LEE MERCIERCredential: MD
Location Address2112 HARRISBURG PIKE, STE 312Lancaster, PA 17601-2644
Mailing Address2112 Harrisburg Pike, Ste 312Lancaster, PA 17601-2644 · (802) 999-6433
Phone(802) 999-6433
Sole ProprietorNo
Medical School CMSOtherGraduated 2018
Enumeration DateJune 21, 2018
Last NPPES UpdateSeptember 11, 20254 updates tracked since enumeration
NPPES CertifiedNovember 4, 2024
✔ NPI 1811481997 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily Medicine · Geriatric MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207QG0300X
License✔ Licensed in PA · MD486393
Definition
A family medicine physician with special knowledge of the aging process and special skills in the diagnostic, therapeutic, preventive and rehabilitative aspects of illness in the elderly. This specialist cares for geriatric patients in the patient's home, the office, long-term care settings such as nursing homes, and the hospital.

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Alison Lee Mercier Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8628329950
PECOS Enrollment IDI20241114000601
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 8

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
182 services109 patients
Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes 99309
A follow-up nursing facility visit per day is a daily check-in by a healthcare professional. This 25-minute visit typically involves monitoring your health progress, addressing any concerns, and adjusting treatment plans as necessary. It's a vital part of ensuring your ongoing wellbeing.
114 services37 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
70 services53 patients
Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes 99310
A follow-up nursing facility visit is a routine check-up that typically lasts about 35 minutes. During this visit, your health status is evaluated, any changes in your condition are noted, and necessary adjustments to your care plan are made. It's an essential part of maintaining your health.
47 services21 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
26 services22 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
24 services24 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Lancaster General Hospital

Acute Care Hospitals · Lancaster, PA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number390100
Location555 North Duke StreetLancaster, PA 17602 · Lancaster County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 17601 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$84.88 typical visit price
range $54.64 – $166.87
Typical copayment $21.22 (range $13.66 – $41.71)
Most-billed visit code 99203
Established Patient
$96.82 typical visit price
range $17.33 – $135.84
Typical copayment $24.20 (range $4.33 – $33.96)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MARK H JOHNSTON MD
Internal Medicine (Gastroenterology)
2112 HARRISBURG PIKE, SUITE 202
LANCASTER, PA 17601
Lancaster County (717) 544-3500
FOTINI DEBONERA MD
Family Medicine
2112 HARRISBURG PIKE, SUITE 312
LANCASTER, PA 17601
Lancaster County (717) 544-3022
CHARLES R ROST M.D.
Internal Medicine (Endocrinology, Diabetes & Metabolism)
2112 HARRISBURG PIKE, SUITE 200
LANCASTER, PA 17601
Lancaster County (717) 544-3059
ALYSSA R SOBIERAY RD
Dietitian, Registered
2112 HARRISBURG PIKE, SUITE 312
LANCASTER, PA 17601
Lancaster County (717) 291-8399
DR. PAUL DAVID ALLEGRETTI D.O.
Internal Medicine (Gastroenterology)
2112 HARRISBURG PIKE, SUITE 202
LANCASTER, PA 17601
Lancaster County (717) 544-3500
STEVE T CHEN M.D.
Internal Medicine (Gastroenterology)
2112 HARRISBURG PIKE, STE 202
LANCASTER, PA 17601
Lancaster County (717) 544-3500
ANNA KWAKYE ANTWI CRNP
Nurse Practitioner (Family)
2112 HARRISBURG PIKE, STE 200
LANCASTER, PA 17601
Lancaster County (717) 544-3059
HEATHER M FRIED CRNP
Nurse Practitioner (Family)
2112 HARRISBURG PIKE
LANCASTER, PA 17601
Lancaster County (717) 544-3022

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Alison Mercier's NPI number?

The NPI number for Alison Mercier is 1811481997. It was assigned to this individual provider in the NPPES registry on June 21, 2018.

Where is Alison Mercier located?

Alison Mercier practices at 2112 Harrisburg Pike Ste 312, Lancaster, PA 17601. The listed phone number is (802) 999-6433.

What is Alison Mercier's specialty?

The primary specialty registered for this NPI is Family Medicine, specializing in Geriatric Medicine, with taxonomy code 207QG0300X.

Is Alison Mercier enrolled in Medicare?

Yes. Alison Mercier is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Is Alison Mercier affiliated with any hospitals?

According to CMS data, Alison Mercier is affiliated with Lancaster General Hospital.

When was this NPI record last updated?

The NPPES record for Alison Mercier was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.