Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Martha Anne Johnston, MD

Family Medicine Physician in Miamisburg, OH · enumerated 2005.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1558348714

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Registry record

Entity type Individual (Type 1)

Name Martha Anne Johnston

Credential MD

Sex Female

Practice address 415 Byers Rd, Ste 300, Miamisburg, OH, 45342

Phone (937) 866-2494

Fax (937) 866-8494

Enumeration date Dec 29, 2005

Last updated in NPPES Jan 20, 2021

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 35.050078 (OH) Secondary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 35050078J (OH) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
JO0658682	Other	OH	MEDICARE PTAN
0658681	Other	OH	MEDICARE PTAN
0658686	Other	OH	MEDICARE PTAN
153891	Medicaid	OH	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Martha Johnston?

The National Provider Identifier (NPI) for Martha Johnston is 1558348714, a Type 1 (individual) record in the CMS NPPES registry.

Where does Martha Johnston practice?

The practice location on file with NPPES is in Miamisburg, OH. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-01-20.