Doctor profile · Federal record
Dr. Catherine Hylwa, M.D.
Internal Medicine Physician (CMS: Internal Medicine) · Colchester, CT
- NPI 1124092515
- Accepts Medicare
- MIPS 89.3 / 100 · 2023
- 34 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
199 Old Hartford RD, Unit #6
Colchester, CT 064152739
(860) 537-2262
fax (860) 537-2273
Credentials & registration
- NPI registered
- February 2006 — 20 yrs on file
- Profile last updated
- September 20, 2011
- Year of graduation
- 1992 — 34 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Connecticut #39118
- Medicaid
- CT #001391185
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1124092515. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
829
Distinct HCPCS
10
Medicare allowed
$78,957
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 385 | 179 | $132 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 115 | 82 | $94 | |
83036 |
Hemoglobin a1c level | 65 | 38 | $10 | |
G0008 |
Administration of influenza virus vaccine | 52 | 51 | $33 | |
90662 |
Influenza vaccine split virus, preservative free | 43 | 42 | $69 | |
82043 |
Urine microalbumin (protein) level | 37 | 33 | $6 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 28 | 28 | $136 | |
G0009 |
Administration of pneumococcal vaccine | 22 | 22 | $33 | |
G0180 |
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 | 17 | 15 | $55 | |
93000 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 16 | 16 | $15 |
In context: peer comparison
Among 2 peers in Colchester Internal Medicine Physician, average services per provider: 54. This provider delivers 15× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
3,246
Patients
838
Total drug cost
$58,816
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 456 | 140 | $6,099 |
| Oxycodone Hcl | Generic | 322 | 31 | $13,539 |
| Levothyroxine Sodium | Generic | 301 | 85 | $5,466 |
| Alprazolam | Generic | 246 | 42 | $1,768 |
| Lisinopril | Generic | 233 | 69 | $2,203 |
| Amlodipine Besylate | Generic | 219 | 71 | $1,966 |
| Gabapentin | Generic | 200 | 52 | $3,532 |
| Albuterol Sulfate Hfa (Albuterol Sulfate) | Brand | 189 | 56 | $6,273 |
| Losartan Potassium | Generic | 169 | 48 | $2,587 |
| Escitalopram Oxalate | Generic | 165 | 45 | $2,404 |
Hospital affiliations
Frequently asked questions
What is Dr. Catherine Hylwa's medical specialty?
Dr. Catherine Hylwa practices Internal Medicine Physician in Colchester, CT.
Where does Dr. Catherine Hylwa practice?
Dr. Catherine Hylwa practices at 199 Old Hartford RD, Colchester, CT 064152739. Office phone: 8605372262.
What is Dr. Catherine Hylwa's NPI?
Dr. Catherine Hylwa's National Provider Identifier (NPI) is 1124092515, issued by NPPES.
Does Dr. Catherine Hylwa accept Medicare assignment?
Yes. Dr. Catherine Hylwa accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Catherine Hylwa commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213); Hemoglobin a1c level (HCPCS 83036). Source: CMS Medicare Physician & Other Practitioners file.