Merlin Gerst, PT
NPI 1295718658 · Physical Therapist · Waltham, MA
Enrolled with Medicare as Practitioner - Physical Therapist in Private Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Merlin Gerst, PT is a Physical Therapist provider in Waltham, MA (NPI 1295718658).
Provider details
- NPI number
- 1295718658
- Entity type
- Individual
- Primary specialty
- Physical TherapistRespiratory, Developmental, Rehabilitative and Restorative Service Providers
- Credential
- PT
- Sex
- Male
- License
- 16129 (MA)
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 tenure28% of score
20 yrs 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
4,455 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 Exercise to Develop Strength, Endurance, Range of Motion, and Flexibility, Each 15 Minutes97110 | 2,297 | $25 |
| Therapy Procedure for Walking Training, Each 15 Minutes97116 | 810 | $24 |
| Therapy Procedure Using Functional Activities97530 | 641 | $38 |
| Therapy Procedure Using Manual Technique, Each 15 Minutes97140 | 264 | $22 |
| Therapy Procedure to Re-Educate Brain-To-Nerve-To-Muscle Function, Each 15 Minutes97112 | 252 | $32 |
| Training for Self-Care Or Home Management, Each 15 Minutes97535 | 126 | $31 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-11-21
- Last updated
- 2007-07-08
Frequently asked questions
- What is Merlin Gerst's NPI number?
- Merlin Gerst's National Provider Identifier (NPI) is 1295718658, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Merlin Gerst's specialty?
- Merlin Gerst is listed in the NPPES registry with a primary specialty of Physical Therapist (Respiratory, Developmental, Rehabilitative and Restorative Service Providers).
- Where is Merlin Gerst located?
- Merlin Gerst's practice location on file with NPPES is 840 Winter St, Waltham, MA 02451.
- What is Merlin Gerst's phone number?
- The practice phone number listed in the NPPES registry for Merlin Gerst is (781) 487-9944.
- Does Merlin Gerst accept Medicare?
- Merlin Gerst is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Merlin Gerst's NPI active?
- Yes — Merlin Gerst's NPI (1295718658) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.