Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. WILLIAM ROBERTS HOWARTH M.D.
NPI 1841463882
Orthopaedic Surgery in New Haven, CT

Q: What is William Howarth's NPI number?

The NPI number for William Howarth is 1841463882. It was assigned to this individual provider in the NPPES registry on April 10, 2008.

Q: What is William Howarth'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 William Howarth was last updated on September 25, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 45 days 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 April 10, 2008PECOS EnrolledAccepts Medicare Assignment

333 CEDAR ST, NEW HAVEN, CT 06510(203) 785-7727 Get Directions Write a Review

NPPES record last updated: September 25, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Sep 25, 2026, Jun 11, 2025, Feb 5, 2024 and 1 more (4 updates tracked since 2021).

On this page

About Dr. William Roberts Howarth M.d. NPPES

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

DR. WILLIAM ROBERTS HOWARTH M.D. (NPI 1841463882) is an individual orthopaedic surgery provider in New Haven, Connecticut, licensed in Connecticut (86571) and active in the NPI registry since April 2008. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Uniformed Services Uhs Fe Hebert School Of Med (2008).

NPPES Registry Identity

NPI1841463882

Entity TypeIndividualMale

Primary Taxonomy207X00000X

Provider Legal NameDR. WILLIAM ROBERTS HOWARTHCredential: M.D.

Location Address333 CEDAR STNew Haven, CT 06510-3206

Mailing AddressPo Box 800022Kansas City, MO 64180-0022 · (800) 953-0104

Phone(203) 785-7727

Sole ProprietorNo

Medical School CMSUniformed Services Uhs Fe Hebert School Of MedGraduated 2008

Enumeration DateApril 10, 2008

Last NPPES UpdateSeptember 25, 20264 updates tracked since enumeration

NPPES CertifiedSeptember 25, 2026

✔ NPI 1841463882 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOrthopaedic SurgeryAllopathic & Osteopathic Physicians

Taxonomy Code207X00000X

Licenses✔ Licensed in CT · 86571✔ Licensed in IN · 01067243A✔ Licensed in CO · DR.0052868

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.

333 CEDAR ST, New Haven, CT 06510

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Secondary Practice Locations 2

Location 14102 Pinion DrUsaf Academy, CO 80840-2502 · Phone (719) 333-5042

Location 24925 N Nevada AveColorado Springs, CO 80918-8600 · Phone (719) 776-3750 · Fax (719) 776-3751

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Select Health.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. William Roberts Howarth 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 ID5698909281

PECOS Enrollment IDI20140403000809, I20190729000481

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

Catholic Health Initiatives Colorado

1,590 mi

Orthopaedic Surgery

401 KENDALL DR
Lamar, CO 81052

Reassigned Medicare billing, Colorado enrollment
1,193 clinicians in this Medicare group

NPI 1679182315 (719) 473-3332

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 17

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.

1,166 services109 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.

364 services256 patients

X-ray of knee, 3 views 73562

An X-ray of the knee, 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the knee from three different angles. This helps medical professionals to diagnose and monitor conditions like arthritis, fractures, or infections. The process is quick and painless.

163 services120 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.

155 services137 patients

X-ray of pelvis, 1-2 views 72170

An X-ray of the pelvis, 1-2 views, is a quick and painless imaging test. It uses a small amount of radiation to produce images of the lower part of your torso. These images help to detect any abnormalities or injuries in your hip bones and surrounding structures.

148 services127 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.

130 services107 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.

91 services66 patients

Replacement of thigh bone and hip joint with prosthesis 27130

This procedure, known as hip arthroplasty, involves replacing your damaged thigh bone and hip joint with artificial parts, called a prosthesis. It helps relieve pain, improve mobility, and enhance your quality of life.

77 services74 patients

Replacement of knee joint, both sides of knee 27447

A bilateral knee joint replacement is a procedure where the damaged parts of both your knee joints are replaced with artificial parts. It aims to relieve pain and improve mobility. The process involves a surgical operation under anesthesia.

69 services67 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.

49 services49 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.

46 services46 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.

39 services26 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.

38 services38 patients

X-ray of pelvis, minimum of 3 views 72190

An X-ray of the pelvis with a minimum of 3 views is a diagnostic procedure that uses radiation to create images of your lower body area. This helps in detecting issues like fractures, arthritis, or other abnormalities. It's quick, non-invasive, and typically painless.

19 services19 patients

Revision of thigh and lower leg bone components of total knee joint prosthesis 27487

This procedure involves replacing parts of your knee joint prosthesis that have worn out or become damaged. Specifically, components in your thigh and lower leg bones are revised to improve joint function and alleviate discomfort.

17 services17 patients

X-ray for bone length assessment 77073

An X-ray for bone length assessment is a simple, non-invasive imaging test. It helps to evaluate the length of your bones and identify any discrepancies or abnormalities. This procedure is quick, painless, and provides valuable information for your healthcare provider.

17 services17 patients

Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and G0180

This is a service where a doctor or authorized practitioner certifies that you require Medicare-covered home health services. They will communicate with the home health agency and review reports on your health status to ensure you receive appropriate care. This does not involve an in-person visit.

11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06510 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

$93.86 typical visit price

range $60.82 – $183.10

Typical copayment $23.46 (range $15.20 – $45.77)

Most-billed visit code 99203

Established Patient

$75.55 typical visit price

range $19.76 – $149.26

Typical copayment $18.88 (range $4.94 – $37.31)

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.

Referred Medical Equipment & Supplies CMS DME claims 4

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Walker, folding, wheeled, adjustable or fixed height E0143

DME-Other DME · category DE000N

5 suppliers41 claims41 services$41.05 avg. paid by Medicare

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431

DME-Oxygen and Supplies · category DC000N

4 suppliers27 claims27 services$17.09 avg. paid by Medicare

Continuous passive motion exercise device for use on knee only E0935

DME-Other DME · category DE000N

1 supplier32 claims645 services$21.89 avg. paid by Medicare

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390

DME-Oxygen and Supplies · category DC002N

5 suppliers30 claims30 services$83.16 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

DR. BRIAN CHRISTOPHER CAMBI M.D.

Internal Medicine (Interventional Cardiology)

333 CEDAR ST, DCB 3
NEW HAVEN, CT 06510

South Central Connecticut Planning Region (203) 785-4129

MATTHEW JOSEPH MCCONNELL M.D.

Internal Medicine (Gastroenterology)

333 CEDAR ST, YNHH INTERNAL MEDICINE-GI,SECTION OF DIGESTIVE DISEASES
NEW HAVEN, CT 06510

South Central Connecticut Planning Region (203) 785-7012

DR. SRI SMITHA KANAPARTHY M.D.

Anesthesiology (Pediatric Anesthesiology)

333 CEDAR ST, TMP 3
NEW HAVEN, CT 06510

South Central Connecticut Planning Region (203) 785-2802

SUNDES KAZMIR M.D.

Student in an Organized Health Care Education/Training Program

333 CEDAR ST, YALE-NEW HAVEN HOSPITAL DEPARTMENT OF PEDIATRICS
NEW HAVEN, CT 06510

South Central Connecticut Planning Region (203) 688-1947

ANASTASIA KOPTELOVA MD

Anesthesiology

333 CEDAR ST
NEW HAVEN, CT 06510

South Central Connecticut Planning Region (203) 688-4242

ROBERT MCNAMARA MD

Internal Medicine (Cardiovascular Disease)

333 CEDAR ST, FMP 3
NEW HAVEN, CT 06510

South Central Connecticut Planning Region (203) 785-4127

DR. BRANDI PARKER COTTON APRN

Nurse Practitioner (Psychiatric/Mental Health)

333 CEDAR ST
NEW HAVEN, CT 06510

South Central Connecticut Planning Region (203) 432-1333

SARAH ELIZABETH SCHELLHORN MD

Internal Medicine (Medical Oncology)

333 CEDAR ST
NEW HAVEN, CT 06510

South Central Connecticut Planning Region (203) 785-4095

JACQUELYNE GADDY

Internal Medicine (Medical Oncology)

333 CEDAR ST
NEW HAVEN, CT 06510

South Central Connecticut Planning Region (203) 785-4095

DR. RENEE MICHELLE YOUNG DO

Anesthesiology

333 CEDAR ST, TOMKINS 3
NEW HAVEN, CT 06510

South Central Connecticut Planning Region (203) 785-2802

DR. MAXIMILIAN STAHL M.D.

Internal Medicine (Hematology & Oncology)

333 CEDAR ST
NEW HAVEN, CT 06510

South Central Connecticut Planning Region (203) 785-4095

DR. CHRISTOPHER BRUCE RANSOM MD, PHD

Psychiatry & Neurology (Clinical Neurophysiology)

333 CEDAR ST, LCI 712
NEW HAVEN, CT 06510

South Central Connecticut Planning Region (203) 785-4085

MRS. ANNEMARIE B. CURNIN CNM, DNP, MPH, MS

Advanced Practice Midwife

333 CEDAR ST
NEW HAVEN, CT 06510

South Central Connecticut Planning Region (203) 432-4771

DR. PHILIP PANG M.D.

Student in an Organized Health Care Education/Training Program

333 CEDAR ST, BOARDMAN 204
NEW HAVEN, CT 06510

South Central Connecticut Planning Region (475) 209-6868

ANNALISA MORGAN MD

Psychiatry & Neurology (Neurology)

333 CEDAR ST
NEW HAVEN, CT 06510

South Central Connecticut Planning Region (203) 688-4242

DANIELA BRENDA RENEDO MD

Neurological Surgery

333 CEDAR ST, PO BOX 208082
NEW HAVEN, CT 06510

South Central Connecticut Planning Region (475) 441-0796

DR. MICHAEL SIMONS M.D.

Internal Medicine (Cardiovascular Disease)

333 CEDAR ST
NEW HAVEN, CT 06510

South Central Connecticut Planning Region (203) 737-4643

DR. CHRISTOPHER THOMAS WHITLOW M.D./PH.D.

Radiology (Diagnostic Radiology)

333 CEDAR ST
NEW HAVEN, CT 06510

South Central Connecticut Planning Region (203) 785-6938

DR. PERRY CHOI MD

Radiology (Diagnostic Radiology)

333 CEDAR ST, YALE RADIOLOGY DEPARTMENT
NEW HAVEN, CT 06510

South Central Connecticut Planning Region (203) 785-5913

ANGELA JENNY LUO

Student in an Organized Health Care Education/Training Program

333 CEDAR ST
NEW HAVEN, CT 06510

South Central Connecticut Planning Region (484) 832-3251

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 William Howarth's NPI number?

The NPI number for William Howarth is 1841463882. It was assigned to this individual provider in the NPPES registry on April 10, 2008.

Where is William Howarth located?

William Howarth practices at 333 Cedar St, New Haven, CT 06510. The listed phone number is (203) 785-7727.

What is William Howarth's specialty?

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

Is William Howarth enrolled in Medicare?

Yes. William Howarth 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 William Howarth's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Howarth reassigns Medicare benefits to Catholic Health Initiatives Colorado (Lamar, CO). 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 William Howarth's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does William Howarth accept?

Health plans from Select Health list William Howarth 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 William Howarth was last updated on September 25, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 45 days 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.