Isabel Johnston, PT, DPT
NPI 1891519583 · Physical Therapist · Portsmouth, NH
Enrolled with Medicare as Practitioner - Physical Therapist in Private Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Isabel Johnston, PT, DPT is a Physical Therapist provider in Portsmouth, NH (NPI 1891519583).
Provider details
- NPI number
- 1891519583
- Entity type
- Individual
- Primary specialty
- Physical TherapistRespiratory, Developmental, Rehabilitative and Restorative Service Providers
- Credential
- PT, DPT
- Sex
- Female
- Sole proprietor
- No
- License
- PT6985 (ME)
Specialties & taxonomies
Respiratory, Developmental, Rehabilitative and Restorative Service Providers
Respiratory, Developmental, Rehabilitative and Restorative Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
1 yr in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
52 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Therapy Procedure Using Functional Activities97530 | 27 | $36 |
| Therapy Procedure to Re-Educate Brain-To-Nerve-To-Muscle Function, Each 15 Minutes97112 | 25 | $25 |
Typical Medicare-allowed amounts for these services range $25–$36 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2024-11-11
- Last updated
- 2024-11-12
- Certified
- 2024-11-12
Frequently asked questions
- What is Isabel Johnston's NPI number?
- Isabel Johnston's National Provider Identifier (NPI) is 1891519583, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Isabel Johnston's specialty?
- Isabel Johnston is listed in the NPPES registry with a primary specialty of Physical Therapist (Respiratory, Developmental, Rehabilitative and Restorative Service Providers).
- Where is Isabel Johnston located?
- Isabel Johnston's practice location on file with NPPES is 767 Islington St Ste 1c, Portsmouth, NH 03801-7206.
- What is Isabel Johnston's phone number?
- The practice phone number listed in the NPPES registry for Isabel Johnston is (603) 368-9971.
- Does Isabel Johnston accept Medicare?
- Isabel Johnston is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Isabel Johnston's NPI active?
- Yes — Isabel Johnston's NPI (1891519583) is active in the NPPES registry as of the last update on 2024-11-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.