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DR. CATHERINE ELISABETH HYLWA M.D.
NPI 1124092515
Internal Medicine in Colchester, CT

Active since February 14, 2006PECOS EnrolledAccepts Medicare Assignment
93.56/100
CMS Quality Rating
199 OLD HARTFORD RD, UNIT #6, COLCHESTER, CT 06415(860) 537-2262(860) 537-2273 Get Directions Write a Review

NPPES record last updated: September 20, 2011. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Catherine Elisabeth Hylwa M.d. NPPES

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

DR. CATHERINE ELISABETH HYLWA M.D. (NPI 1124092515) is an individual internal medicine provider in Colchester, Connecticut, licensed in Connecticut (39118) and active in the NPI registry since February 2006. She is enrolled in Medicare PECOS and is a graduate of Other (1992).

NPPES Registry Identity

NPI1124092515
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. CATHERINE ELISABETH HYLWACredential: M.D.
Location Address199 OLD HARTFORD RD, UNIT #6Colchester, CT 06415-2739
Mailing Address199 Old Hartford Rd, Unit #6Colchester, CT 06415-2739 · (860) 537-2262 · Fax (860) 537-2273
Phone(860) 537-2262
Fax(860) 537-2273
Sole ProprietorNo
Medical School CMSOtherGraduated 1992
Enumeration DateFebruary 14, 2006
Last NPPES UpdateSeptember 20, 2011
✔ NPI 1124092515 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CT · 39118
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
199 OLD HARTFORD RD, Colchester, CT 06415
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Other Identifiers 3

Medicare UPING45340CT
Medicare ID-Type Unspecified110008149CT
Medicaid001391185CT

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.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. Catherine Elisabeth Hylwa 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 ID8022159466
PECOS Enrollment IDI20100423000952
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 Catherine Hylwa reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Hartford Healthcare Medical Group, Inc
17 mi
Surgery
1290 SILAS DEANE HWY, ATTN: LINDA STRAKA
Wethersfield, CT 06109
  • Reassigned Medicare billing, Connecticut enrollment
  • 747 clinicians in this Medicare group
NPI 1043561301 (860) 972-9033

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 10

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.

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.
355 services165 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.
143 services100 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
109 services109 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
43 services40 patients
Influenza vaccine split virus, preservative free 90662
The Influenza Vaccine Split Virus, preservative-free, is a flu shot to protect against the influenza virus. It is made from parts of inactivated flu viruses and doesn't contain preservatives, reducing potential side effects. It helps your body develop immunity to the flu.
36 services33 patients
Urine microalbumin (protein) level 82043
The urine microalbumin level test measures the amount of a protein called albumin in your urine. This test helps to detect early signs of kidney damage. High levels of albumin may suggest your kidneys aren't functioning properly. It's a simple, non-invasive test that involves providing a urine sample.
26 services24 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06415 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
$138.84 typical visit price
range $60.82 – $183.10
Typical copayment $34.71 (range $15.20 – $45.77)
Most-billed visit code 99204
Established Patient
$106.68 typical visit price
range $19.76 – $149.26
Typical copayment $26.67 (range $4.94 – $37.31)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

93.56/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality78.51
Promoting Interoperability100
Improvement Activities40

Reported Quality Measures

Breast Cancer Screening
Percentage of women 50-74 years of age who had a mammogram to screen for breast cancer
43%325 patients2/55-star benchmark: 92%
Cervical Cancer Screening
Percentage of women 21-64 years of age who were screened for cervical cancer using either of the following criteria: - Women age 21-64 who had cervical cytology performed every 3 years - Women age 30-64 who had cervical cytology/human papillomavirus (HPV)…
27%394 patients
Colorectal Cancer Screening
Percentage of adults 50-75 years of age who had appropriate screening for colorectal cancer
18%501 patients1/55-star benchmark: 85%
Diabetes: Eye Exam
Percentage of patients 18-75 years of age with diabetes who had a retinal or dilated eye exam by an eye care professional during the measurement period or a negative retinal exam (no evidence of retinopathy) in the 12 months prior to the measurement period
15%120 patients1/55-star benchmark: 100%
Pneumococcal Vaccination Status for Older Adults
Percentage of patients 65 years of age and older who have ever received a pneumococcal vaccine
28%241 patients2/55-star benchmark: 90%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Referred Medical Equipment & Supplies CMS DME claims 7

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

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
4 suppliers21 claims41 services$5.96 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
4 suppliers11 claims11 services$0.82 avg. paid by Medicare
Bedside drainage bag, day or night, with or without anti-reflux device, with or without tube, each A4357
DME-Orthotic Devices · category DF000N
1 supplier13 claims26 services$9.05 avg. paid by Medicare
Enteral feeding supply kit; pump fed, per day, includes but not limited to feeding/flushing syringe, administration set tubing, dressings, tape B4035
Other-Enteral and Parenteral · category OB006N
1 supplier25 claims750 services$4.14 avg. paid by Medicare
Enteral formula, nutritionally complete, calorically dense (equal to or greater than 1.5 kcal/ml) with intact nutrients, includes proteins, fats, carbohydrates, vitamins and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit B4152
Other-Enteral and Parenteral · category OB006N
1 supplier15 claims3,840 services$0.28 avg. paid by Medicare
Enteral formula, nutritionally complete, hydrolyzed proteins (amino acids and peptide chain), includes fats, carbohydrates, vitamins and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit B4153
Other-Enteral and Parenteral · category OB006N
1 supplier13 claims4,603 services$0.86 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 2

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

COLCHESTER INTERNAL MEDICINE, LLC
Internal Medicine
199 OLD HARTFORD RD, UNIT #6
COLCHESTER, CT 06415
Southeastern Connecticut Planning Region (860) 537-2262
DR. JAMES GEORGE BUCCI M.D.
Internal Medicine
199 OLD HARTFORD RD, UNIT #6
COLCHESTER, CT 06415
Southeastern Connecticut Planning Region (860) 537-2262

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 Catherine Hylwa's NPI number?

The NPI number for Catherine Hylwa is 1124092515. It was assigned to this individual provider in the NPPES registry on February 14, 2006.

Where is Catherine Hylwa located?

Catherine Hylwa practices at 199 Old Hartford Rd Unit #6, Colchester, CT 06415. The listed phone number is (860) 537-2262.

What is Catherine Hylwa's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Catherine Hylwa enrolled in Medicare?

Yes. Catherine Hylwa 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 Catherine Hylwa's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Catherine Hylwa reassigns Medicare benefits to Hartford Healthcare Medical Group, Inc (Wethersfield, CT). 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 Catherine Hylwa's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Catherine Hylwa accept?

Health plans from Anthem Blue Cross and Blue Shield list Catherine Hylwa 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 Catherine Hylwa was last updated on September 20, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.