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MARY HELEN DAVIS MD
NPI 1346261831
Psychiatry & Neurology - Psychiatry in Lancaster, PA

Active since July 21, 2006PECOS Enrolled
822 MARIETTA AVE, SUITE 31, LANCASTER, PA 17603(717) 392-7062(717) 392-5495 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Mary Helen Davis Md NPPES

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

MARY HELEN DAVIS MD (NPI 1346261831) is an individual psychiatry provider in Lancaster, Pennsylvania, licensed in Pennsylvania (MD054851L) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1346261831
Entity TypeIndividualFemale
Primary Taxonomy2084P0800X
Provider Legal NameMARY HELEN DAVISCredential: MD
Location Address822 MARIETTA AVE, SUITE 31Lancaster, PA 17603-3239
Mailing Address822 Marietta Ave, Suite 31Lancaster, PA 17603-3239 · (717) 392-7062 · Fax (717) 392-5495
Phone(717) 392-7062
Fax(717) 392-5495
Sole ProprietorYes
Enumeration DateJuly 21, 2006
Last NPPES UpdateSeptember 11, 2025
✔ NPI 1346261831 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
License✔ Licensed in PA · MD054851L
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
Also ListedPsychiatry & Neurology · Child & Adolescent PsychiatryTaxonomy 2084P0804X · License MD054851L (PA)
822 MARIETTA AVE, Lancaster, PA 17603
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mary Helen Davis Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 17603 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
$166.87 typical visit price
range $54.64 – $166.87
Typical copayment $41.71 (range $13.66 – $41.71)
Most-billed visit code 99205
Established Patient
$68.36 typical visit price
range $17.33 – $135.84
Typical copayment $17.09 (range $4.33 – $33.96)
Most-billed visit code 99213
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 13

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

JANNEKE M VAN BEUSEKOM LCSW
Social Worker (Clinical)
822 MARIETTA AVE, SUITE 23
LANCASTER, PA 17603
Lancaster County (717) 393-3002
MARGARET MORIARTY M.S.
Counselor
822 MARIETTA AVE
LANCASTER, PA 17603
Lancaster County (717) 399-8288
ERMA WEAVER LCSW
Social Worker (Clinical)
822 MARIETTA AVE
LANCASTER, PA 17603
Lancaster County (717) 399-8288
CHARLENE K. ESHLEMAN RN, CS
Clinical Nurse Specialist (Psychiatric/Mental Health, Adult)
822 MARIETTA AVE
LANCASTER, PA 17603
Lancaster County (717) 399-8288
TIMOTHY BUSHONG M.A.
Counselor
822 MARIETTA AVE
LANCASTER, PA 17603
Lancaster County (717) 399-8288
JANET E BROWN LSW
Social Worker
822 MARIETTA AVE, #31
LANCASTER, PA 17603
Lancaster County (717) 392-7062
ELIZABETH GEE M.S.
Counselor (Professional)
822 MARIETTA AVE
LANCASTER, PA 17603
Lancaster County (717) 399-8288
JESSICA M KRATZ
Counselor (Mental Health)
822 MARIETTA AVE
LANCASTER, PA 17603
Lancaster County (717) 399-8288

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 Mary Davis's NPI number?

The NPI number for Mary Davis is 1346261831. It was assigned to this individual provider in the NPPES registry on July 21, 2006.

Where is Mary Davis located?

Mary Davis practices at 822 Marietta Ave Suite 31, Lancaster, PA 17603. The listed phone number is (717) 392-7062.

What is Mary Davis's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Mary Davis enrolled in Medicare?

Yes. Mary Davis is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Mary Davis 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 11 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.