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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MEREDITH JO MASON MD
NPI 1457663791
Emergency Medicine in Marietta, OH

Active since July 01, 2010PECOS Enrolled
401 MATTHEW ST, EMERGENCY DEPARTMENT, MARIETTA, OH 45750(740) 376-1939(740) 374-1693 Get Directions Write a Review

NPPES record last updated: September 28, 2026. Verified against the NPPES registry weekly; last sync: October 04, 2026.

Record update history: Sep 28, 2026, Nov 12, 2025, Jul 8, 2025 and 4 more (7 updates tracked since 2020).

About Meredith Jo Mason Md NPPES

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

MEREDITH JO MASON MD (NPI 1457663791) is an individual emergency medicine provider in Marietta, Ohio, licensed in Ohio (350123041) and active in the NPI registry since July 2010. She is enrolled in Medicare PECOS, is affiliated with Marietta Memorial Hospital, and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1457663791
Entity TypeIndividualFemale
Primary Taxonomy207P00000X
Provider Legal NameMEREDITH JO MASONCredential: MD
Location Address401 MATTHEW ST, EMERGENCY DEPARTMENTMarietta, OH 45750-1635
Mailing AddressPo Box 449Marietta, OH 45750-0449
Phone(740) 376-1939
Fax(740) 374-1693
Sole ProprietorYes
Medical School CMSWest Virginia University School Of MedicineGraduated 2010
Enumeration DateJuly 1, 2010
Last NPPES UpdateSeptember 28, 20267 updates tracked since enumeration
NPPES CertifiedSeptember 28, 2026
✔ NPI 1457663791 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
Licenses✔ Licensed in OH · 350123041✔ Licensed in WV · 24808
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
401 MATTHEW ST, Marietta, OH 45750
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Secondary Practice Locations 3

Location 1314 S Wells STSistersville, WV 26175-1098 · Phone (304) 652-2611 · Fax (304) 652-1448
Location 21106 Colegate DR Emergency DeptMarietta, OH 45750-1323 · Phone (740) 568-2000
Location 3799 Farson St, Emergency DeptBelpre, OH 45714-1044 · Phone (740) 401-1150 · Fax (740) 401-1155

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include CareSource.Insurance ›

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

Meredith Jo Mason 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 ID3274772298
PECOS Enrollment IDI20140522001528
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 4

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.

Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
313 services305 patients
Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
143 services139 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
93 services91 patients
Emergency department visit with low level of medical decision making 99283
An emergency department visit for a problem of moderate severity involves immediate medical attention for issues like minor fractures, burns, or high fever. The healthcare team will assess your condition, provide necessary treatment, and may suggest further tests or admission if required.
30 services29 patients

Hospital Affiliations CMS Care Compare 2

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

Marietta Memorial Hospital

Acute Care Hospitals · Marietta, OH
4/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number360147
Location401 Matthew StreetMarietta, OH 45750 · Washington County
Emergency services Birthing friendly

Selby General Hospital

Critical Access Hospitals · Marietta, OH
OwnershipVoluntary non-profit - Private
CMS Certification Number361319
Location1106 Colegate DriveMarietta, OH 45750 · Washington County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 45750 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
$84.72 typical visit price
range $54.34 – $166.65
Typical copayment $21.18 (range $13.58 – $41.66)
Most-billed visit code 99203
Established Patient
$96.44 typical visit price
range $17.10 – $135.40
Typical copayment $24.11 (range $4.27 – $33.85)
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.

CONSTANCE J OATES FNP
Nurse Practitioner
401 MATTHEW ST, EMERGENCY DEPARTMENT
MARIETTA, OH 45750
Washington County (740) 376-1939
JANELLE A THOMAS MD
Emergency Medicine
401 MATTHEW ST, EMERGENCY DEPT
MARIETTA, OH 45750
Washington County (740) 374-1400
LEXIE MULLEN MS, CCC-SLP
Speech-Language Pathologist
401 MATTHEW ST
MARIETTA, OH 45750
Washington County (740) 374-1422
DR. DIANA WHEELER DO
Family Medicine
401 MATTHEW ST
MARIETTA, OH 45750
Washington County (740) 374-7700
JULIAN ADAM JOHN JAKUBOWSKI DO
Emergency Medicine
401 MATTHEW ST, EMERGENCY DEPARTMENT
MARIETTA, OH 45750
Washington County (740) 376-1939
GEOFFREY SIROCKMAN DO
Emergency Medicine
401 MATTHEW ST, EMERGENCY DEPARTMENT
MARIETTA, OH 45750
Washington County (740) 568-5669
PUSHPA UPRETY FNP
Nurse Practitioner (Family)
401 MATTHEW ST
MARIETTA, OH 45750
Washington County (740) 374-1494
DR. DISHA SHAH MD
Student in an Organized Health Care Education/Training Program
401 MATTHEW ST
MARIETTA, OH 45750
Washington County (740) 374-1400

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 Meredith Mason's NPI number?

The NPI number for Meredith Mason is 1457663791. It was assigned to this individual provider in the NPPES registry on July 1, 2010.

Where is Meredith Mason located?

Meredith Mason practices at 401 Matthew St Emergency Department, Marietta, OH 45750. The listed phone number is (740) 376-1939.

What is Meredith Mason's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Meredith Mason enrolled in Medicare?

Yes. Meredith Mason 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.

What insurance does Meredith Mason accept?

Health plans from CareSource list Meredith Mason as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Meredith Mason affiliated with any hospitals?

According to CMS data, Meredith Mason is affiliated with Marietta Memorial Hospital and Selby General Hospital.

When was this NPI record last updated?

The NPPES record for Meredith Mason was last updated on September 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 days 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.