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ZACHARY M JOHNSTON MD
NPI 1720449812
Internal Medicine - Gastroenterology in Bethesda, MD

Active since March 16, 2016PECOS Enrolled
4494 PALMER RD N, BETHESDA, MD 20889(717) 823-1216 Get Directions Write a Review

NPPES record last updated: April 15, 2024. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Apr 15, 2024, Jul 8, 2019, Mar 16, 2016 (3 updates tracked since 2016).

About Zachary M Johnston Md NPPES

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

ZACHARY M JOHNSTON MD (NPI 1720449812) is an individual gastroenterology provider in Bethesda, Maryland, licensed in Virginia (0101262981) and active in the NPI registry since March 2016. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1720449812
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameZACHARY M JOHNSTONCredential: MD
Location Address4494 PALMER RD NBethesda, MD 20889-2111
Mailing Address8901 Wisconsin AveBethesda, MD 20889-0004 · (301) 295-4600
Phone(717) 823-1216
Sole ProprietorNo
Enumeration DateMarch 16, 2016
Last NPPES UpdateApril 15, 20243 updates tracked since enumeration
NPPES CertifiedApril 15, 2024
✔ NPI 1720449812 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in VA · 0101262981
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
Also ListedInternal MedicineTaxonomy 207R00000X · License 0101262981 (VA)
4494 PALMER RD N, Bethesda, MD 20889
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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)

Zachary M Johnston 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 20889 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
$147.85 typical visit price
range $65.18 – $194.86
Typical copayment $36.96 (range $16.29 – $48.71)
Most-billed visit code 99204
Established Patient
$113.72 typical visit price
range $21.40 – $158.88
Typical copayment $28.43 (range $5.35 – $39.72)
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 16

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

DR. EMILY JOANN VIERA MD
Military Health Care Provider
4494 PALMER RD N
BETHESDA, MD 20889
Montgomery County (301) 295-4810
DR. MELISSA BETH KANG M.D.
Pediatrics
4494 PALMER RD N
BETHESDA, MD 20889
Montgomery County (301) 295-4000
SIERRAH MARIE GRIGSBY MD, PHD
General Practice
4494 PALMER RD N
BETHESDA, MD 20889
Montgomery County (301) 295-4810
JONATHAN D. HENDERSON M.D.
Emergency Medicine
4494 PALMER RD N
BETHESDA, MD 20889
Montgomery County (301) 295-2737
EDWARD R. SAUTER MD, PHD, M.H.A.
Surgery (Surgical Oncology)
4494 PALMER RD N
BETHESDA, MD 20889
Montgomery County (301) 295-4000
CHRISTINA RUTHERFORD MD
Student in an Organized Health Care Education/Training Program
4494 PALMER RD N
BETHESDA, MD 20889
Montgomery County (301) 295-4000
SOREN ALMA CHRISTENSEN DMD
Dentist
4494 PALMER RD N, ORAL & MAXILLOFACIAL SURGERY
BETHESDA, MD 20889
Montgomery County (850) 368-4944
DR. JACK WILLIAM GEOCARIS DO, MPH
General Practice
4494 PALMER RD N
BETHESDA, MD 20889
Montgomery County (301) 295-4000

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 Zachary Johnston's NPI number?

The NPI number for Zachary Johnston is 1720449812. It was assigned to this individual provider in the NPPES registry on March 16, 2016.

Where is Zachary Johnston located?

Zachary Johnston practices at 4494 Palmer Rd N, Bethesda, MD 20889. The listed phone number is (717) 823-1216.

What is Zachary Johnston's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Zachary Johnston enrolled in Medicare?

Yes. Zachary Johnston is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Zachary Johnston was last updated on April 15, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.