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ALEXANDER CLAYTON MAST DO
NPI 1679920755
Pediatrics in Saint Marys, OH

Active since May 19, 2016PECOS Enrolled
1010 HAGER ST, SAINT MARYS, OH 45885(419) 394-9579(419) 394-9580 Get Directions Write a Review

NPPES record last updated: August 2, 2023. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jul 14, 2023, Mar 17, 2023, Jul 31, 2019 and 2 more (5 updates tracked since 2016).

About Alexander Clayton Mast Do NPPES

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

ALEXANDER CLAYTON MAST DO (NPI 1679920755) is an individual pediatrics provider in Saint Marys, Ohio, licensed in Michigan (5101024607) and active in the NPI registry since May 2016. He is enrolled in Medicare PECOS and maintains a secondary practice location in Celina.

NPPES Registry Identity

NPI1679920755
Entity TypeIndividualMale
Primary Taxonomy208000000X
Provider Legal NameALEXANDER CLAYTON MASTCredential: DO
Location Address1010 HAGER STSaint Marys, OH 45885-2421
Mailing Address1140 S Knoxville Ave Ste DSaint Marys, OH 45885-2609 · (419) 300-1129 · Fax (419) 394-9575
Phone(419) 394-9579
Fax(419) 394-9580
Sole ProprietorNo
Enumeration DateMay 19, 2016
Last NPPES UpdateAugust 2, 20235 updates tracked since enumeration
NPPES CertifiedAugust 2, 2023
✔ NPI 1679920755 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in MI · 5101024607
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
1010 HAGER ST, Saint Marys, OH 45885
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Secondary Practice Location 1

Location 1801 Pro Dr Ste D5Celina, OH 45822-3307 · Phone (419) 394-9579 · Fax (419) 394-9580

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Buckeye Health Plan, Ambetter from Meridian, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Alexander Clayton Mast Do 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 45885 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 4

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

EFREN C AGANON MD
Pediatrics
1010 HAGER ST
SAINT MARYS, OH 45885
Auglaize County (419) 394-9579
THE PEDIATRIC HEALTHCARE CENTER LLC
Pediatrics
1010 HAGER ST
ST MARYS, OH 45885
Auglaize County (419) 394-2610
THOMAS JOSEPH ZEGARSKI MD
Pediatrics
1010 HAGER ST
SAINT MARYS, OH 45885
Auglaize County (419) 394-9579
KAMI LYN FOX CNP
Nurse Practitioner (Pediatrics)
1010 HAGER ST
ST MARYS, OH 45885
Auglaize County (419) 394-2610

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 Alexander Mast's NPI number?

The NPI number for Alexander Mast is 1679920755. It was assigned to this individual provider in the NPPES registry on May 19, 2016.

Where is Alexander Mast located?

Alexander Mast practices at 1010 Hager St, Saint Marys, OH 45885. The listed phone number is (419) 394-9579.

What is Alexander Mast's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Alexander Mast enrolled in Medicare?

Yes. Alexander Mast is registered in the Medicare PECOS enrollment system.

What insurance does Alexander Mast accept?

Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, CareSource and Priority Health list Alexander Mast 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.

When was this NPI record last updated?

The NPPES record for Alexander Mast was last updated on August 2, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years 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.