What is Christopher Chambers's NPI number?

Christopher Chambers's National Provider Identifier (NPI) is 1184831869, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Christopher Chambers's specialty?

Christopher Chambers is listed in the NPPES registry with a primary specialty of Vascular Surgery Physician (Allopathic & Osteopathic Physicians).

Where is Christopher Chambers located?

Christopher Chambers's practice location on file with NPPES is 275 Michigan St Ne, Grand Rapids, MI 49503-2531.

What is Christopher Chambers's phone number?

The practice phone number listed in the NPPES registry for Christopher Chambers is (616) 267-8700.

Does Christopher Chambers accept Medicare?

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

Is Christopher Chambers's NPI active?

Yes — Christopher Chambers's NPI (1184831869) is active in the NPPES registry as of the last update on 2025-09-22.

IndividualActiveAccepts Medicare

Christopher Chambers, MD, PHD

NPI 1184831869 · Vascular Surgery Physician · Grand Rapids, MI

Christopher Chambers, MD, PHD is a Vascular Surgery Physician provider in Grand Rapids, MI (NPI 1184831869).

Provider details

NPI number: 1184831869
Entity type: Individual
Primary specialty: Vascular Surgery PhysicianAllopathic & Osteopathic Physicians
Credential: MD, PHD
Sex: Male
Sole proprietor: No
License: 4301091284 (MI)

Practice location

275 Michigan St Ne

Grand Rapids, MI 49503-2531

Phone: (616) 267-8700

Fax: (616) 267-8247

Street-level locationGet directions

More MI providers

Mailing address

100 Michigan St Ne

Grand Rapids, MI 49503-2560

Specialties & taxonomies

Vascular Surgery PhysicianPrimary2086S0129XLicense 4301091284 (MI)
Allopathic & Osteopathic Physicians
Vascular Surgery Physician2086S0129XLicense 036158917 (IL)
Allopathic & Osteopathic Physicians

Additional practice locations (1)

4600 Memorial Dr Ste 120
Belleville, IL 62226-5359
Phone: (618) 222-1020

Enrolled with Medicare as Practitioner - Vascular Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Profile Score

Detailed profile(77/100 index)

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

Registry tenure25% of score
19 yrs in NPPES registry
Profile completeness25% of score
100% of core fields populated
Practice footprint15% of score
2 documented practice locations
Medicare service volume (vs. specialty peers)25% of score
516 Medicare services, 2024 (ranked within specialty)
Open Payments transparency10% of score
Has Open Payments disclosures (2024)

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)
Ultrasound Study of Arm and Leg Arteries93922	124	$72
Ultrasound of Both Sides of Head and Neck Blood Flow93880	73	$176
Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213	57	$90
Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214	42	$127
Complete Ultrasound of Aorta, Vena Cava, Groin Vessels Or Bypass Grafts93978	38	$163
Complete Ultrasound Study of Arm and Leg Arteries93923	36	$121

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.

Drug	Part D claims (2024)	Beneficiaries
Clopidogrel Bisulfatebrand: Clopidogrel	78	31
Apixabanbrand: Eliquis	40	—
Rivaroxabanbrand: Xarelto	21	—
Cilostazol	14	—
Atorvastatin Calcium	13	—

Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do not include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.

Transparency — industry payments

Based on CMS Open Payments, 2024; not all care is captured.

$328 across 9 records (Open Payments 2024)

Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.

Enumerated: 2007-05-16
Last updated: 2025-09-22
Certified: 2025-09-22

Frequently asked questions

What is Christopher Chambers's NPI number?: Christopher Chambers's National Provider Identifier (NPI) is 1184831869, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Christopher Chambers's specialty?: Christopher Chambers is listed in the NPPES registry with a primary specialty of Vascular Surgery Physician (Allopathic & Osteopathic Physicians).
Where is Christopher Chambers located?: Christopher Chambers's practice location on file with NPPES is 275 Michigan St Ne, Grand Rapids, MI 49503-2531.
What is Christopher Chambers's phone number?: The practice phone number listed in the NPPES registry for Christopher Chambers is (616) 267-8700.
Does Christopher Chambers accept Medicare?: Christopher Chambers is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is Christopher Chambers's NPI active?: Yes — Christopher Chambers's NPI (1184831869) is active in the NPPES registry as of the last update on 2025-09-22.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

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)
Ultrasound Study of Arm and Leg Arteries93922	124	$72
Ultrasound of Both Sides of Head and Neck Blood Flow93880	73	$176
Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213	57	$90
Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214	42	$127
Complete Ultrasound of Aorta, Vena Cava, Groin Vessels Or Bypass Grafts93978	38	$163
Complete Ultrasound Study of Arm and Leg Arteries93923	36	$121

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.

Drug	Part D claims (2024)	Beneficiaries
Clopidogrel Bisulfatebrand: Clopidogrel	78	31
Apixabanbrand: Eliquis	40	—
Rivaroxabanbrand: Xarelto	21	—
Cilostazol	14	—
Atorvastatin Calcium	13	—

Transparency — industry payments

Based on CMS Open Payments, 2024; not all care is captured.

$328 across 9 records (Open Payments 2024)

Provider details

Practice location

Mailing address

Specialties & taxonomies

Additional practice locations (1)

Profile Score

What this provider does (Medicare)

What this provider prescribes (Medicare Part D)

Transparency — industry payments

Registry dates

Frequently asked questions

Specialties & taxonomies

Additional practice locations (1)

Frequently asked questions

Profile Score

What this provider does (Medicare)

What this provider prescribes (Medicare Part D)

Transparency — industry payments