Martha Johnston, PTA
NPI 1992299572 · Physical Therapy Assistant · Grandville, MI
Martha Johnston, PTA is a Physical Therapy Assistant provider in Grandville, MI (NPI 1992299572).
Provider details
- NPI number
- 1992299572
- Entity type
- Individual
- Primary specialty
- Physical Therapy AssistantRespiratory, Developmental, Rehabilitative and Restorative Service Providers
- Credential
- PTA
- Sex
- Female
- Sole proprietor
- Yes
- License
- 5502000187 (MI)
Specialties & taxonomies
Respiratory, Developmental, Rehabilitative and Restorative Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
8 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-06-18
- Last updated
- 2018-06-18
Frequently asked questions
- What is Martha Johnston's NPI number?
- Martha Johnston's National Provider Identifier (NPI) is 1992299572, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Martha Johnston's specialty?
- Martha Johnston is listed in the NPPES registry with a primary specialty of Physical Therapy Assistant (Respiratory, Developmental, Rehabilitative and Restorative Service Providers).
- Where is Martha Johnston located?
- Martha Johnston's practice location on file with NPPES is 3400 Wilson Ave Sw, Grandville, MI 49418-1854.
- What is Martha Johnston's phone number?
- The practice phone number listed in the NPPES registry for Martha Johnston is (616) 534-5487.
- Is Martha Johnston's NPI active?
- Yes — Martha Johnston's NPI (1992299572) is active in the NPPES registry as of the last update on 2018-06-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.