Dr. John Joseph Osowski, MD
- Medicare services, 2024
- 643
- Medicare patients, 2024
- 255
- Part D claims, 2024
- 6,705
- Hospital affiliations
- 2
- Industry payments
- $3,273
- Practice address
- 130 Division St, Derby, CT 06418
- Practice phone
- Call (203) 732-7500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Osowski's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. John Joseph Osowski is a hospitalist in Derby, Connecticut
Dr. Osowski practices at Griffin Hospital in Derby, Connecticut, part of Griffin Hospital.
Dr. Osowski's NPI, 1205085719, was assigned on September 9, 2008. Dr. Osowski graduated from Albany Medical College of Union University in 2006. Dr. Osowski holds Connecticut license 49214.
- NPI
- 1205085719NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9133309719
- NPI enumeration date
- September 9, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (203) 732-7500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 46
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Joseph Osowski practices at 2 locations in Derby, Connecticut
Dr. Osowski's primary practice is Griffin Hospital, at 130 Division St, Derby, CT 06418 in New Haven County. The practice phone is (203) 732-7500. Dr. Osowski also practices at Griffin Hospital, 144 Division St, Derby, CT 06418.
- Griffin HospitalPrimary130 Division St, Derby, CT 06418 · New Haven CountyPhone(203) 732-7500
- Griffin Hospital144 Division St, Derby, CT 06418 · Naugatuck Vly CountyPhone(203) 732-7360
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. John Joseph Osowski is affiliated with 5 sites of care and 3 medical groups
Dr. Osowski's primary practice is Griffin Hospital in Derby, Connecticut, part of Griffin Hospital. Dr. Osowski is also affiliated with UConn John Dempsey Hospital. The medical group on file is Trinity Health Of New England Medical Group. Dmand AI also links Dr. Osowski to 2 more hospices, 2 medical groups and 1 skilled nursing facility, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John Joseph Osowski's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Osowski practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Griffin Hospital | Available with a free account |
| +4 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Griffin Hospital and 6.2K+ hospitals, with verified contacts in the same login.
Dr. John Joseph Osowski is one of 358 hospitalists in Connecticut
Hospitalist is Dr. Osowski's primary specialty in the NPI Registry, under taxonomy code 208M00000X. Dr. Osowski is licensed in Connecticut.
Specialties and state licenses
- Hospitalist, ConnecticutPrimary
Hospitalists near Dr. Osowski
Counts of hospitalists 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. John Joseph Osowski billed Medicare for 643 services in 2024
CMS data shows 643 Medicare services from Dr. Osowski across 7 procedure codes in 2024, for 255 Medicare patients. Medicare paid $52,048 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Osowski's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 6232024: 6433%
Dr. Osowski compared with the Connecticut median for hospitalists, 2024
- Dr. Osowski
- Connecticut median
- Medicare services
- 643vs 2602.5 times
- Medicare patients
- 255vs 15367% above
- Part D claims
- 6,144vs 8076.8 times
Medians across 354 hospitalists in Connecticut with Dmand AI profiles that report each measure.
Dr. Osowski'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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Joseph Osowski treated 255 Medicare patients in 2024, average age 78
CMS counts 255 Medicare patients who saw Dr. Osowski in 2024. The largest group is 85 and over, with 90 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 53% are also on Medicaid. Their average risk score is 2.63, 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. Osowski's median patient age at 77, with 49% women.
Dr. Osowski's Medicare patients by age, 2024
Dr. Osowski's Medicare patients by sex, 2024
- Women14256%
- Men11344%
Chronic conditions among Dr. Osowski's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Mood disorders60%
- Anxiety57%
- Arthritis57%
- Depression55%
- Ischemic heart disease52%
- Heart failure47%
Share of Medicare patients with each condition. A patient can have several.
Dr. Osowski's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 77
Patient panel by sex, all payers
- Women49%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Joseph Osowski wrote 6,705 Medicare Part D claims in 2024
In 2024, Dr. Osowski wrote 6,705 Medicare Part D claims for 156 patients. 81% of them were for generic drugs. CMS names the drug for 6,144 of them, across 125 drugs with 11 or more claims each, at $444,021 in total drug cost. In 2023, CMS named 402 claims across 16 drugs.
Dr. Osowski's Part D claims by kind of drug, 2024
- Generic5,435 claims81%
- Brand-name1,241 claims19%
- Other29 claims0%
Dr. Osowski's most prescribed drugs by claims, 2024
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. Osowski's Part D claims, 2024
- Antibiotics2%112 of 6,705 claims
- Antipsychotics, patients 65 and over2%136 of 6,705 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, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 4022024: 6,1441428%
Drugs named by CMS: 125 in 2024, 16 in 2023.
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. John Joseph Osowski takes part in Medicare
Dr. Osowski 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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Dr. John Joseph Osowski received $3,273 in industry payments from 2016 to 2025
CMS Open Payments shows 170 general payments to Dr. Osowski from 23 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 97% of the total. Janssen Pharmaceuticals, Inc paid the most, $574.
General payments to Dr. Osowski by program year, 2016 to 2025
General payments to Dr. Osowski by kind, 2016 to 2025
- Food and beverage$3,16997%
- Education$1043%
Companies that paid Dr. Osowski the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Joseph Osowski graduated from Albany Medical College of Union University
Dr. Osowski graduated from Albany Medical College of Union University in 2006.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John Joseph Osowski's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare 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 percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. John Joseph Osowski
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. John Joseph Osowski's NPI number?
Dr. John Joseph Osowski's NPI number is 1205085719. It was assigned on September 9, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. John Joseph Osowski?
Dr. John Joseph Osowski is a hospitalist in Derby, Connecticut. The primary specialty in the NPI Registry is Hospitalist Physician (taxonomy code 208M00000X).
Where does Dr. John Joseph Osowski practice?
Dr. Osowski practices at 130 Division St, Derby, CT 06418. Dr. Osowski also practices at 144 Division St, Derby, CT 06418. Dr. Osowski's primary practice is Griffin Hospital in Derby, Connecticut, part of Griffin Hospital. Dmand AI also links Dr. Osowski to 2 hospices, 2 medical groups and 1 skilled nursing facility.
What is Dr. John Joseph Osowski's office phone number?
The practice phone on file for Dr. Osowski is (203) 732-7500.
What is Dr. John Joseph Osowski's medical license number?
Dr. Osowski holds Connecticut license 49214.
Which hospitals is Dr. John Joseph Osowski affiliated with?
Dr. Osowski practices at Griffin Hospital in Derby, Connecticut. Dr. Osowski is also affiliated with UConn John Dempsey Hospital.
What medical group is Dr. John Joseph Osowski part of?
Dr. Osowski is linked to Trinity Health Of New England Medical Group. Dmand AI links Dr. Osowski to 2 more medical groups.
Does Dr. John Joseph Osowski accept Medicare?
Yes. CMS data shows Dr. Osowski billed Medicare for 643 services in 2024, and Dr. Osowski accepts Medicare assignment.
How many Medicare patients does Dr. John Joseph Osowski see?
CMS counts 255 Medicare patients who saw Dr. Osowski in 2024, with an average age of 78.
What services does Dr. John Joseph Osowski bill to Medicare?
In 2024, Dr. Osowski's most billed Medicare services were hospital inpatient care (99232), nursing facility care (99306) and nursing facility care (99309).
Show 4 more questionsShow fewer questions
Where did Dr. John Joseph Osowski go to medical school?
Dr. Osowski graduated from Albany Medical College of Union University in 2006.
What drugs does Dr. John Joseph Osowski prescribe most?
In 2024 Medicare Part D data, Dr. Osowski's most prescribed drugs by claims were Trazodone HCl, Eliquis and Atorvastatin Calcium.
Has Dr. John Joseph Osowski received payments from drug or device companies?
CMS Open Payments shows $3,273 in general payments to Dr. Osowski from 23 companies from 2016 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. John Joseph Osowski been practicing?
Dr. Osowski graduated from medical school in 2006, 20 years ago.
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