MARK CESARE MERLI DPT
NPI 1780307587
Physical Therapist in Issaquah, WA

Active since September 26, 2022Accepts Medicare Assignment
510 8TH AVE NE STE 340, ISSAQUAH, WA 98029(425) 313-3055(425) 313-3051 Get Directions Write a Review

NPPES record last updated: August 6, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Aug 6, 2026, Apr 7, 2026, Mar 31, 2026 and 1 more (4 updates tracked since 2022).

About Mark Cesare Merli Dpt NPPES

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

MARK CESARE MERLI DPT (NPI 1780307587) is an individual physical therapist in Issaquah, Washington, licensed in Washington (PT.PT.70090482-CP) and active in the NPI registry since September 2022. He maintains 2 additional practice locations and is a graduate of Other (2022).

NPPES Registry Identity

NPI1780307587
Entity TypeIndividualMale
Primary Taxonomy225100000X
Provider Legal NameMARK CESARE MERLICredential: DPT
Location Address510 8TH AVE NE STE 340Issaquah, WA 98029-5449
Mailing Address510 8th Ave Ne Ste 320Issaquah, WA 98029-5436 · (425) 313-3055 · Fax (425) 313-3051
Fax(425) 313-3051
Sole ProprietorNo
Medical School CMSOtherGraduated 2022
Enumeration DateSeptember 26, 2022
Last NPPES UpdateAugust 6, 20264 updates tracked since enumeration
NPPES CertifiedAugust 6, 2026
✔ NPI 1780307587 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
Licenses✔ Licensed in WA · PT.PT.70090482-CP✔ Licensed in CO · CP054705T
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:
  • Diagnose and manage movement dysfunction and enhance physical and functional abilities.
  • 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.
  • Prevent the onset, symptoms, and progression of impairments, functional limitations, and disabilities that may result from diseases, disorders, conditions, or injuries.
  • Treat conditions of the musculoskeletal, neuromuscular, cardiovascular, pulmonary, and/or integumentary systems.
  • Address the negative effects attributable to unique personal and environmental factors as they relate to human performance.
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.
510 8TH AVE NE STE 340, Issaquah, WA 98029

Secondary Practice Locations 2

Location 11200 112th Ave NE Ste C260Bellevue, WA 98004-3746 · Phone (425) 313-3055 · Fax (425) 313-3051
Location 27726 Center Blvd SE Ste 220Snoqualmie, WA 98065-8753 · Phone (425) 313-3055 · Fax (425) 313-3051

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mark Cesare Merli Dpt 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 ID1355809252
PECOS Enrollment IDI20260820004492

Medicare Billing Reassignment

Medicare enrollment records show Mark Merli reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Physical Therapist
510 8TH AVE NE STE 340
Issaquah, WA 98029
  • Reassigned Medicare billing, Washington enrollment
  • 589 clinicians in this Medicare group

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 98029 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$97.43 typical visit price
range $63.67 – $189.37
Typical copayment $24.35 (range $15.91 – $47.34)
Most-billed visit code 99203
Established Patient
$78.74 typical visit price
range $21.12 – $155.00
Typical copayment $19.68 (range $5.28 – $38.75)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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
510 8TH AVE NE STE 340
ISSAQUAH, WA 98029
Physical Therapist
510 8TH AVE NE STE 340
ISSAQUAH, WA 98029
Physical Therapist
510 8TH AVE NE STE 340
ISSAQUAH, WA 98029
Physical Therapist
510 8TH AVE NE STE 340
ISSAQUAH, WA 98029
Physical Therapist
510 8TH AVE NE STE 340
ISSAQUAH, WA 98029
Physical Therapist
510 8TH AVE NE STE 340
ISSAQUAH, WA 98029
Physical Therapist
510 8TH AVE NE STE 340
ISSAQUAH, WA 98029
Physical Therapist
510 8TH AVE NE STE 340
ISSAQUAH, WA 98029

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 Mark Merli's NPI number?

The NPI number for Mark Merli is 1780307587. It was assigned to this individual provider in the NPPES registry on September 26, 2022.

Where is Mark Merli located?

Mark Merli practices at 510 8th Ave NE Ste 340, Issaquah, WA 98029. The listed phone number is (425) 313-3055.

What is Mark Merli's specialty?

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

Is Mark Merli enrolled in Medicare?

Yes. Mark Merli 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.

Which organization bills Medicare for Mark Merli's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Merli reassigns Medicare benefits to Proliance Surgeons Inc., P.S. (Issaquah, WA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mark Merli's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mark Merli accept?

Health plans from Ambetter Health, Premera Blue Cross Blue Shield of Alaska and Select Health list Mark Merli as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Mark Merli was last updated on August 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.