Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

MERLIN GERST PT
NPI 1295718658
Physical Therapist in Waltham, MA

Active since November 21, 2005
840 WINTER ST, WALTHAM, MA 02451(781) 487-9944(781) 487-9966 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.

About Merlin Gerst Pt NPPES

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

MERLIN GERST PT (NPI 1295718658) is an individual physical therapist in Waltham, Massachusetts, licensed in Massachusetts (16129) and active in the NPI registry since November 2005. He is a graduate of Other (2002).

NPPES Registry Identity

NPI1295718658
Entity TypeIndividualMale
Primary Taxonomy225100000X
Provider Legal NameMERLIN GERSTCredential: PT
Location Address840 WINTER STWaltham, MA 02451
Mailing Address840 Winter StWaltham, MA 02451 · (781) 487-9944 · Fax (781) 487-9966
Fax(781) 487-9966
Sole ProprietorNo
Medical School CMSOtherGraduated 2002
Enumeration DateNovember 21, 2005
Last NPPES UpdateJuly 13, 2026
NPI 1295718658 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyPhysical TherapistRespiratory, Developmental, Rehabilitative and Restorative Service Providers
Taxonomy Code225100000X
License Licensed in MA · 16129
Definition

Physical therapists (PTs) are licensed health care professionals who diagnose and treat individuals of all ages, from newborns to the very oldest, who have medical problems or other health-related conditions that limit their abilities to move and perform functional activities in their daily lives. PTs examine each individual and develop a plan using treatment techniques to promote the ability to move, reduce pain, restore function, and prevent disability. In addition, PTs work with individuals to prevent the loss of mobility before it occurs by developing fitness- and wellness-oriented programs for healthier and more active lifestyles. PTs:<ul><li>Diagnose and manage movement dysfunction and enhance physical and functional abilities.</li><li>Restore, maintain, and promote not only optimal physical function but optimal wellness and fitness and optimal quality of life as it relates to movement and health.</li><li>Prevent the onset, symptoms, and progression of impairments, functional limitations, and disabilities that may result from diseases, disorders, conditions, or injuries.</li><li>Treat conditions of the musculoskeletal, neuromuscular, cardiovascular, pulmonary, and/or integumentary systems.</li><li>Address the negative effects attributable to unique personal and environmental factors as they relate to human performance.</li></ul>PTs provide care for people in a variety of settings, including hospitals, private practices, outpatient clinics, home health agencies, schools, sports and fitness facilities, work settings, and nursing homes. State licensure is required in each state in which a PT practices.

840 WINTER ST, Waltham, MA 02451

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Merlin Gerst Pt is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2466410667
PECOS Enrollment IDI20041220000887

Areas of Expertise CMS Part B claims 8

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes 97110
This therapy involves exercises to boost strength, endurance, flexibility, and range of motion. Each session lasts 15 minutes. The goal is to improve physical function and overall health. It's a safe, beneficial method for enhancing well-being and fitness.
2,297 services72 patients
Therapy procedure for walking training, each 15 minutes 97116
Walking training therapy is a process to improve your ability to walk. It's a 15-minute session where you'll practice walking with the help of devices or exercises. It aims to enhance balance, strength, coordination, and endurance.
810 services65 patients
Therapy procedure using functional activities 97530
A therapy procedure using functional activities encourages you to use your own body movements in day-to-day tasks to aid recovery. It aims to improve your mobility, strength, and overall health by incorporating therapeutic exercises into your routine.
641 services63 patients
Therapy procedure using manual technique, each 15 minutes 97140
This therapy involves using hands-on techniques to help improve your body's movement and function. These techniques may include stretching, resistance exercises, or gentle pressure. Each session lasts 15 minutes and aims to relieve pain, promote healing, and improve your overall health.
264 services30 patients
Therapy procedure to re-educate brain-to-nerve-to-muscle function, each 15 minutes 97112
This therapy helps retrain your brain, nerves, and muscles to work together. Through targeted exercises, your body learns to regain lost functions or improve current abilities. Each session lasts 15 minutes.
252 services50 patients
Training for self-care or home management, each 15 minutes 97535
This service involves training sessions, each lasting 15 minutes, focused on teaching you essential self-care or home management skills. You'll learn techniques to manage your health condition at home, promoting independence and enhancing your quality of life.
126 services43 patients

Other Providers at the Same Location NPPES 20

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

Physical Therapist
840 WINTER ST
WALTHAM, MA 02451
Physical Therapist
840 WINTER ST
WALTHAM, MA 02451
Physical Therapy Assistant
840 WINTER ST
WALTHAM, MA 02451
Orthotist
840 WINTER ST
WALTHAM, MA 02451
Physical Therapist
840 WINTER ST, ATTN: PRO SPORTS THERAPY
WALTHAM, MA 02451
Physical Therapist
840 WINTER ST, ATTN: PRO SPORTS THERAPY
WALTHAM, MA 02451
Physical Therapist
840 WINTER ST
WALTHAM, MA 02451
Physical Therapist
840 WINTER ST, ATTN: PRO SPORTS THERAPY
WALTHAM, MA 02451

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 Merlin Gerst's NPI number?

The NPI number for Merlin Gerst is 1295718658. It was assigned to this individual provider in the NPPES registry on November 21, 2005.

Where is Merlin Gerst located?

Merlin Gerst practices at 840 Winter St, Waltham, MA 02451. The listed phone number is (781) 487-9944.

What is Merlin Gerst's specialty?

The primary specialty registered for this NPI is Physical Therapist with taxonomy code 225100000X.

Is Merlin Gerst enrolled in Medicare?

Yes. Merlin Gerst is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Merlin Gerst was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.