DR. SILAS T. MARSHALL M.D.
NPI 1225217011
Orthopaedic Surgery in Bellevue, WA

Q: What is Silas Marshall's NPI number?

The NPI number for Silas Marshall is 1225217011. It was assigned to this individual provider in the NPPES registry on October 29, 2007.

Q: What is Silas Marshall's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.

Q: When was this NPI record last updated?

The NPPES record for Silas Marshall was last updated on January 24, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 years 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.

Active since October 29, 2007PECOS EnrolledAccepts Medicare Assignment

1231 116TH AVE NE, SUITE 750, BELLEVUE, WA 98004(425) 455-3600(425) 455-3920 Get Directions Write a Review

NPPES record last updated: January 24, 2014. Verified against the NPPES registry weekly; last sync: November 01, 2026.

On this page

About Dr. Silas T. Marshall M.d. NPPES

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

DR. SILAS T. MARSHALL M.D. (NPI 1225217011) is an individual orthopaedic surgery provider in Bellevue, Washington, licensed in Washington (MD60386052) and active in the NPI registry since October 2007. He is enrolled in Medicare PECOS, is affiliated with Overlake Hospital Medical Center, and is a graduate of Other (2007).

NPPES Registry Identity

NPI1225217011

Entity TypeIndividualMale

Primary Taxonomy207X00000X

Provider Legal NameDR. SILAS T. MARSHALLCredential: M.D.

Location Address1231 116TH AVE NE, SUITE 750Bellevue, WA 98004-3804

Mailing Address805 Madison St, Suite 901Seattle, WA 98104-1172 · (206) 264-8100

Phone(425) 455-3600

Fax(425) 455-3920

Sole ProprietorNo

Medical School CMSOtherGraduated 2007

Enumeration DateOctober 29, 2007

Last NPPES UpdateJanuary 24, 2014

✔ NPI 1225217011 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyOrthopaedic SurgeryAllopathic & Osteopathic Physicians

Taxonomy Code207X00000X

License✔ Licensed in WA · MD60386052

Definition

An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.

Also ListedOrthopaedic Surgery · Orthopaedic TraumaTaxonomy 207XX0801X · License MD60386052 (WA)

1231 116TH AVE NE, Bellevue, WA 98004

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Premera Blue Cross Blue Shield of Alaska, Providence Health Plan.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

Dr. Silas T. Marshall M.d. 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 ID7113180837

PECOS Enrollment IDI20130913000462

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

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

Proliance Surgeons, Inc., P.S.

Same address

Otolaryngology

1231 116TH AVE NE STE 915
Bellevue, WA 98004

Reassigned Medicare billing, Washington enrollment
589 clinicians in this Medicare group

NPI 1255500542 (425) 454-3938

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

Areas of Expertise CMS Part B claims 15

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.

Hyaluronan or derivative, synvisc or synvisc-one, for intra-articular injection, 1 mg J7325

Synvisc or Synvisc-One is a treatment involving an injection of a substance called hyaluronan into your joints. This substance, naturally found in the body, helps lubricate and cushion your joints, reducing pain and improving mobility. It's often used for arthritis patients.

624 services11 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

203 services115 patients

Injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg J0702

This injection contains two medications, betamethasone acetate and betamethasone sodium phosphate. It is used to reduce inflammation and pain. It's given by a healthcare professional, often directly into the area causing discomfort.

68 services12 patients

X-ray of thigh bone, minimum 2 views 73552

An X-ray of the thigh bone is a non-invasive imaging test. It involves passing a small amount of radiation through the thigh to produce images of the bone structure. At least two different angles are captured for a comprehensive view. This helps detect fractures, infections, or other abnormalities.

67 services28 patients

X-ray of shoulder, minimum of 2 views 73030

An X-ray of the shoulder, with a minimum of 2 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of your shoulder bones. This helps in diagnosing conditions like fractures, arthritis, or other abnormalities. The procedure is quick and painless.

60 services25 patients

X-ray of hip, 2-3 views 73502

An X-ray of the hip with 2-3 views is a non-invasive imaging test. It uses a small amount of radiation to produce pictures of the hip joint. These images help in diagnosing conditions like fractures, arthritis, or other abnormalities. The process is quick and painless.

54 services35 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

51 services50 patients

X-ray of knee, 1-2 views 73560

An X-ray of the knee with 1-2 views is a quick, painless test that produces images of the knee bones. It helps identify fractures, infections, or changes in the knee joint. During the procedure, you'll be asked to stay still while the X-ray machine captures the images.

50 services22 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

48 services45 patients

X-ray of ankle, minimum of 3 views 73610

An ankle X-ray is a quick, painless imaging test. It involves capturing at least three different images or 'views' of your ankle using small amounts of radiation. These images help identify any abnormalities or injuries, such as fractures or arthritis.

38 services16 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

29 services29 patients

Aspiration and/or injection of fluid from large joint 20610

This procedure involves using a needle to remove (aspiration) or introduce (injection) fluid into a large joint like the knee or hip. It can help diagnose conditions, relieve discomfort, or deliver medication directly to the joint.

27 services21 patients

Treatment of broken neck of thigh bone with bone implant 27245

This procedure involves repairing a fractured thigh bone by inserting a bone implant. The implant helps stabilize the bone, allowing it to heal correctly. It's performed under anesthesia and requires a hospital stay for recovery.

20 services20 patients

X-ray of knee, 4 or more views 73564

An X-ray of the knee, 4 or more views, is a non-invasive imaging test. It involves capturing multiple images of your knee from different angles. This helps in diagnosing conditions such as fractures, arthritis, or infections. The procedure is quick and painless.

18 services14 patients

Treatment of upper end of broken thigh bone with placement of stabilizing device or prosthetic replacement 27236

This procedure involves treating a fracture at the top of your thigh bone. A stabilizing device or prosthetic replacement is placed to aid in healing. This helps restore mobility and function while reducing pain. The treatment aims for a quick and safe recovery.

12 services12 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Overlake Hospital Medical Center

Acute Care Hospitals · Bellevue, WA

4/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number500051

Location1035-116th Ave NEBellevue, WA 98004 · King County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 98004 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.

MS. JESSICA SWENSON ARNP

Nurse Practitioner (Obstetrics & Gynecology)

1231 116TH AVE NE, SUITE 950
BELLEVUE, WA 98004

King County (425) 454-3366

DR. JONATHAN CHAIM KOPELOVICH M.D.

Otolaryngology

1231 116TH AVE NE, SUITE 915
BELLEVUE, WA 98004

King County (425) 454-3938

CHRISTOPHER LEE SCOTT SUDP

Counselor (Addiction (Substance Use Disorder))

1231 116TH AVE NE
BELLEVUE, WA 98004

King County (425) 749-5483

CAROLINE PAIGE PEARSON

Counselor (Mental Health)

1231 116TH AVE NE
BELLEVUE, WA 98004

King County (425) 454-1010

SAMSON LEE MD

Otolaryngology

1231 116TH AVE NE, SUITE 915
BELLEVUE, WA 98004

King County (425) 454-3938

DEAN S RICKETTS M.D.

Orthopaedic Surgery

1231 116TH AVE NE, SUITE 100
BELLEVUE, WA 98004

King County (425) 454-5344

GRETA KRAMER RD

Dietitian, Registered

1231 116TH AVE NE
BELLEVUE, WA 98004

King County (425) 454-1010

MRS. CORINA DAWN PETERSON AU.D.

Audiologist

1231 116TH AVE NE, SUITE 915
BELLEVUE, WA 98004

King County (425) 454-3938

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 Silas Marshall's NPI number?

The NPI number for Silas Marshall is 1225217011. It was assigned to this individual provider in the NPPES registry on October 29, 2007.

Where is Silas Marshall located?

Silas Marshall practices at 1231 116th Ave NE Suite 750, Bellevue, WA 98004. The listed phone number is (425) 455-3600.

What is Silas Marshall's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.

Is Silas Marshall enrolled in Medicare?

Yes. Silas Marshall 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 Silas Marshall's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Silas Marshall reassigns Medicare benefits to Proliance Surgeons, Inc., P.S. (Bellevue, 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 Silas Marshall's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Silas Marshall accept?

Health plans from Ambetter Health, Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Silas Marshall 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.

Is Silas Marshall affiliated with any hospitals?

According to CMS data, Silas Marshall is affiliated with Overlake Hospital Medical Center.

When was this NPI record last updated?

The NPPES record for Silas Marshall was last updated on January 24, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 years 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.