What is Marissa Kiefer's NPI number?

Marissa Kiefer's National Provider Identifier (NPI) is 1528608965, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Marissa Kiefer's specialty?

Marissa Kiefer is listed in the NPPES registry with a primary specialty of Physical Therapist (Respiratory, Developmental, Rehabilitative and Restorative Service Providers).

Where is Marissa Kiefer located?

Marissa Kiefer's practice location on file with NPPES is 35 Longwood Rd, Middle Island, NY 11953-2045.

What is Marissa Kiefer's phone number?

The practice phone number listed in the NPPES registry for Marissa Kiefer is (631) 924-0008.

Does Marissa Kiefer accept Medicare?

Marissa Kiefer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Marissa Kiefer's NPI active?

Yes — Marissa Kiefer's NPI (1528608965) is active in the NPPES registry as of the last update on 2025-07-09.

IndividualActiveAccepts Medicare

Marissa Kiefer, D.P.T.

NPI 1528608965 · Physical Therapist · Middle Island, NY

Enrolled with Medicare as Practitioner - Physical Therapist in Private Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Marissa Kiefer, D.P.T. is a Physical Therapist provider in Middle Island, NY (NPI 1528608965).

Provider details

NPI number: 1528608965
Entity type: Individual
Primary specialty: Physical TherapistRespiratory, Developmental, Rehabilitative and Restorative Service Providers
Credential: D.P.T.
Sex: Female
Sole proprietor: No
License: 045266 (NY)

Specialties & taxonomies

Physical TherapistPrimary225100000XLicense 045266 (NY)
Respiratory, Developmental, Rehabilitative and Restorative Service Providers

Profile Score

Established profile(57/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure28% of score
6 yrs in NPPES registry
Profile completeness28% of score
100% of core fields populated
Practice footprint17% of score
4 documented practice locations
Medicare service volume (vs. specialty peers)28% of score
666 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	157	$40
Therapy Procedure to Re-Educate Brain-To-Nerve-To-Muscle Function, Each 15 Minutes97112	154	$28
Therapy Procedure Using Manual Technique, Each 15 Minutes97140	152	$23
Therapy Procedure Using Exercise to Develop Strength, Endurance, Range of Motion, and Flexibility, Each 15 Minutes97110	150	$24
Electrical Stimulation (unattended), to One Or More Areas for Indication(s) Other Than Wound Care, As Part of a Therapy Plan of CareG0283	53	$10

Typical Medicare-allowed amounts for these services range $10–$40 (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

35 Longwood Rd

Middle Island, NY 11953-2045

Phone: (631) 924-0008

Fax: (631) 924-4602

Street-level locationGet directions

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Mailing address