Dr. Collins C. Onwuka, MD

  • Manchester, CT
  • Internist
NPI1366054009PAC ID3779994876
Medicare services, 2024
281
Medicare patients, 2024
178
Part D claims, 2024
55
Hospital affiliations
1
Medical groups
2
Practice address
71 Haynes St, Manchester, CT 06040
Practice phone
Call (860) 647-4780
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Manchester Memorial Hospital

Hospital · Manchester, Connecticut

See all 4 affiliations

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Dr. Collins C. Onwuka is an internist in Manchester, Connecticut

Dr. Onwuka practices at Manchester Memorial Hospital in Manchester, Connecticut, part of Hartford HealthCare.

Dr. Onwuka's NPI, 1366054009, was assigned on August 22, 2020. Dr. Onwuka holds Connecticut license 73005.

NPI and contact details
Medicare PAC ID
3779994876
NPI enumeration date
August 22, 2020
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(860) 647-4780
Professional email
Get email
Personal email
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Mobile number
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Sex
Male
Estimated age
43
Medical school graduation
2009

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Collins C. Onwuka practices at Manchester Memorial Hospital in Manchester, Connecticut

Dr. Onwuka's primary practice is Manchester Memorial Hospital, at 71 Haynes St, Manchester, CT 06040 in Hartford County. The practice phone is (860) 647-4780.

Source: Dmand AI Affiliation Data

Dr. Collins C. Onwuka is affiliated with 2 sites of care and 2 medical groups

Dr. Onwuka's primary practice is Manchester Memorial Hospital in Manchester, Connecticut, part of Hartford HealthCare. The medical group on file is Sound Physicians. Dmand AI also links Dr. Onwuka to 1 more group practice or clinic and 1 medical group, each named with a free account.

See all 4 affiliations for Dr. Onwuka

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Collins C. Onwuka's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Onwuka practices, 2 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Manchester Memorial HospitalAvailable with a free account
+1 more site and 1 medical groupAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Collins C. Onwuka is one of 2,189 internists in Connecticut

Internal medicine is Dr. Onwuka's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Onwuka is licensed in Connecticut.

Specialties and state licenses

  • Internal medicine, ConnecticutPrimaryLicense 73005 · taxonomy 207R00000X

Internists near Dr. Onwuka

Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Dr. Collins C. Onwuka billed Medicare for 281 services in 2024

CMS data shows 281 Medicare services from Dr. Onwuka across 6 procedure codes in 2024, for 178 Medicare patients. Medicare paid $28,877 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 2024281
Medicare patients178
Paid by Medicare$28,877
Procedure codes6

Dr. Onwuka's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 472024: 281498%

Dr. Onwuka compared with the Connecticut median for internists, 2024

  • Dr. Onwuka
  • Connecticut median
Medicare services
281vs 39028% below
Medicare patients
178vs 172Close to median
Part D claims
17vs 34395% below

Medians across 2,185 internists in Connecticut with Dmand AI profiles that report each measure.

Dr. Onwuka's most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by Dr. Onwuka

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Collins C. Onwuka treated 178 Medicare patients in 2024, average age 75

CMS counts 178 Medicare patients who saw Dr. Onwuka in 2024. The largest group is 65 to 74, with 50 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 49% are also on Medicaid. Their average risk score is 2.05, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Onwuka's median patient age at 76, with 55% women.

Medicare patients, 2024178
Average age75
Average risk score2.05
Also on Medicaid49%

Dr. Onwuka's Medicare patients by age, 2024

Dr. Onwuka's Medicare patients by sex, 2024

  • Women10760%
  • Men7140%

Chronic conditions among Dr. Onwuka's Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol75%
  3. Mood disorders62%
  4. Anxiety61%
  5. Depression53%
  6. Arthritis49%
  7. Diabetes47%
  8. COPD38%

Share of Medicare patients with each condition. A patient can have several.

Dr. Onwuka's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 76

Patient panel by sex, all payers

  • Women55%
  • Men44%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Collins C. Onwuka wrote 55 Medicare Part D claims in 2024

In 2024, Dr. Onwuka wrote 55 Medicare Part D claims for 27 patients. 89% of them were for generic drugs. CMS names the drug for 17 of them, across 1 drug with 11 or more claims each, at $314 in total drug cost. In 2022, CMS named 33 claims across 3 drugs.

Part D claims, 202455
Drugs named by CMS1
Total drug cost$314
Part D patients27

Dr. Onwuka's Part D claims by kind of drug, 2024

  • Generic49 claims89%
  • Brand-name and other6 claims11%

Dr. Onwuka's most prescribed drugs by claims, 2023

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Drug classes CMS tracks in Dr. Onwuka's Part D claims, 2024

  • Antibiotics20%11 of 55 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

Part D claims for drugs CMS names, 2022 to 2023

  • 2022
  • 2023
Claims for drugs CMS names
2022: 332023: 1748%

Drugs named by CMS: 1 in 2023, 3 in 2022.

See all prescribing by Dr. Onwuka

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

How Dr. Collins C. Onwuka takes part in Medicare

Dr. Onwuka accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Accepts Medicare assignment
Yes

Source: Doctors and Clinicians National Downloadable File (CMS)

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Sources for Dr. Collins C. Onwuka's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Collins C. Onwuka

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Dr. Collins C. Onwuka's NPI number?

Dr. Collins C. Onwuka's NPI number is 1366054009. It was assigned on August 22, 2020, and it is active in the NPI Registry.

What kind of doctor is Dr. Collins C. Onwuka?

Dr. Collins C. Onwuka is an internist in Manchester, Connecticut. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).

Where does Dr. Collins C. Onwuka practice?

Dr. Onwuka practices at 71 Haynes St, Manchester, CT 06040. Dr. Onwuka's primary practice is Manchester Memorial Hospital in Manchester, Connecticut, part of Hartford HealthCare. Dmand AI also links Dr. Onwuka to 1 group practice or clinic and 1 medical group.

What is Dr. Collins C. Onwuka's office phone number?

The practice phone on file for Dr. Onwuka is (860) 647-4780.

What is Dr. Collins C. Onwuka's medical license number?

Dr. Onwuka holds Connecticut license 73005.

Which hospitals is Dr. Collins C. Onwuka affiliated with?

Dr. Onwuka practices at Manchester Memorial Hospital in Manchester, Connecticut.

What medical group is Dr. Collins C. Onwuka part of?

Dr. Onwuka is linked to Sound Physicians. Dmand AI links Dr. Onwuka to 1 more medical group.

Does Dr. Collins C. Onwuka accept Medicare?

Yes. CMS data shows Dr. Onwuka billed Medicare for 281 services in 2024, and Dr. Onwuka accepts Medicare assignment.

How many Medicare patients does Dr. Collins C. Onwuka see?

CMS counts 178 Medicare patients who saw Dr. Onwuka in 2024, with an average age of 75.

What services does Dr. Collins C. Onwuka bill to Medicare?

In 2024, Dr. Onwuka's most billed Medicare services were hospital inpatient care (99223), hospital inpatient care (99222) and care management and other visits (99497).

What drugs does Dr. Collins C. Onwuka prescribe most?

In 2023 Medicare Part D data, Dr. Onwuka's most prescribed drugs by claims were Atorvastatin Calcium.

How long has Dr. Collins C. Onwuka been practicing?

Dr. Onwuka graduated from medical school in 2009, 17 years ago.

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