DR. CHRISTOPHER GEORGE LARSEN M.D.
NPI 1124550538
Orthopaedic Surgery - Hand Surgery in Bay Shore, NY

Q: What is Christopher Larsen's NPI number?

The NPI number for Christopher Larsen is 1124550538. It was assigned to this individual provider in the NPPES registry on April 3, 2017.

Q: What is Christopher Larsen's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery, specializing in Hand Surgery, with taxonomy code 207XS0106X.

Active since April 03, 2017PECOS EnrolledAccepts Medicare Assignment

45 PARK AVE, BAY SHORE, NY 11706(631) 376-0700(631) 376-0102 Get Directions Write a Review

NPPES record last updated: May 14, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: May 14, 2026, Feb 8, 2023 (2 updates tracked since 2023).

On this page

About Dr. Christopher George Larsen M.d. NPPES

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

DR. CHRISTOPHER GEORGE LARSEN M.D. (NPI 1124550538) is an individual hand surgery provider in Bay Shore, New York, licensed in New York (316506) and active in the NPI registry since April 2017. He is enrolled in Medicare PECOS, is affiliated with St Charles Hospital, and is a graduate of Loyola University Of Chicago, Stritch School Of Medicine (2017).

NPPES Registry Identity

NPI1124550538

Entity TypeIndividualMale

Primary Taxonomy207XS0106X

Provider Legal NameDR. CHRISTOPHER GEORGE LARSENCredential: M.D.

Location Address45 PARK AVEBay Shore, NY 11706-7308

Mailing Address45 Park AveBay Shore, NY 11706-7308 · (631) 376-0700 · Fax (631) 376-0102

Phone(631) 376-0700

Fax(631) 376-0102

Sole ProprietorNo

Medical School CMSLoyola University Of Chicago, Stritch School Of MedicineGraduated 2017

Enumeration DateApril 3, 2017

Last NPPES UpdateMay 14, 20262 updates tracked since enumeration

NPPES CertifiedMay 14, 2026

✔ NPI 1124550538 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOrthopaedic Surgery · Hand SurgeryAllopathic & Osteopathic Physicians

Taxonomy Code207XS0106X

License✔ Licensed in NY · 316506

Definition

An orthopaedic surgeon trained in the investigation, preservation and restoration by medical, surgical and rehabilitative means of all structures of the upper extremity directly affecting the form and function of the hand and wrist.

45 PARK AVE, Bay Shore, NY 11706

Open in Google Maps ↗

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. Christopher George Larsen 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 ID3476897638

PECOS Enrollment IDI20230314001960

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 Christopher Larsen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Chs Physician Partners, P.C

7.9 mi

Family Medicine

213 MONTAUK HWY
West Sayville, NY 11796

Reassigned Medicare billing, New York enrollment
Medicare enrollment name: Chs Physician Partners PC
944 clinicians in this Medicare group

NPI 1679823512 (631) 563-6205

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 13

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.

Injection, triamcinolone acetonide, not otherwise specified, 10 mg J3301

Triamcinolone acetonide is a medication used to reduce inflammation in the body. It's given as a 10 mg injection for conditions like allergies, arthritis, or skin problems. The injection helps to decrease swelling, redness, and itching.

284 services67 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.

131 services85 patients

X-ray of hand, minimum of 3 views 73130

An X-ray of the hand, minimum of 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the bones in your hand from different angles. This helps in diagnosing fractures, infections, arthritis, or other abnormalities. It's quick and painless.

74 services55 patients

Injection into tendon or ligament 20550

An injection into a tendon or ligament involves placing medication directly into these areas to help reduce inflammation and pain. It's often used for conditions like arthritis or tendonitis. The procedure is quick and usually involves a local anesthetic.

70 services44 patients

X-ray of wrist, minimum of 3 views 73110

An X-ray of the wrist, minimum of 3 views, is a diagnostic procedure that uses radiation to create images of your wrist from different angles. This helps detect fractures, infections, or other abnormalities for accurate diagnosis and treatment planning.

62 services28 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

48 services48 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.

47 services47 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.

40 services38 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

36 services33 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.

33 services15 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.

31 services31 patients

Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231

Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.

25 services11 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.

14 services13 patients

Hospital Affiliations CMS Care Compare 2

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

St Charles Hospital

Acute Care Hospitals · Port Jefferson, NY

4/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number330246

Location200 Belle Terre RoadPort Jefferson, NY 11777 · Suffolk County

Birthing friendly

Good Samaritan Hospital Medical Center

Acute Care Hospitals · West Islip, NY

1/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number330286

Location1000 Montauk HighwayWest Islip, NY 11795 · Suffolk County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11706 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

$105.06 typical visit price

range $67.40 – $203.53

Typical copayment $26.26 (range $16.85 – $50.88)

Most-billed visit code 99203

Established Patient

$83.44 typical visit price

range $21.66 – $164.45

Typical copayment $20.86 (range $5.41 – $41.11)

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

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

ISABELLA MARIE PICCOLA PA

Physician Assistant

45 PARK AVE
BAY SHORE, NY 11706

Suffolk County (631) 376-0700

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 Christopher Larsen's NPI number?

The NPI number for Christopher Larsen is 1124550538. It was assigned to this individual provider in the NPPES registry on April 3, 2017.

Where is Christopher Larsen located?

Christopher Larsen practices at 45 Park Ave, Bay Shore, NY 11706. The listed phone number is (631) 376-0700.

What is Christopher Larsen's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery, specializing in Hand Surgery, with taxonomy code 207XS0106X.

Is Christopher Larsen enrolled in Medicare?

Yes. Christopher Larsen 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 Christopher Larsen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Christopher Larsen reassigns Medicare benefits to Chs Physician Partners, P.C (West Sayville, NY). 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 Christopher Larsen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Christopher Larsen affiliated with any hospitals?

According to CMS data, Christopher Larsen is affiliated with St Charles Hospital and Good Samaritan Hospital Medical Center.

When was this NPI record last updated?

The NPPES record for Christopher Larsen was last updated on May 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.