Dr. Joseph Blaise Guarnaccia, MD
- Medicare services, 2024
- 371
- Medicare patients, 2024
- 181
- Part D claims, 2024
- 7,739
- Hospital affiliations
- 6
- Industry payments
- $692,103
- 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. Guarnaccia'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. Joseph Blaise Guarnaccia is a neurologist in Derby, Connecticut
Dr. Guarnaccia practices at Griffin Hospital in Derby, Connecticut, part of Griffin Hospital.
Dr. Guarnaccia's NPI, 1235164427, was assigned on July 12, 2006. Dr. Guarnaccia graduated from University of Oklahoma College of Medicine in 1987. Dr. Guarnaccia holds Connecticut license 031179.
- NPI
- 1235164427NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0244391357
- NPI enumeration date
- July 12, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (203) 732-7500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Joseph Blaise Guarnaccia practices at 2 locations in Derby, Connecticut
Dr. Guarnaccia'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. Guarnaccia 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. Joseph Blaise Guarnaccia is affiliated with 6 sites of care and 1 medical group
Dr. Guarnaccia's primary practice is Griffin Hospital in Derby, Connecticut, part of Griffin Hospital. Dr. Guarnaccia is also affiliated with Yale New Haven Hospital. The medical group on file is Care New England Medical Group. Dmand AI also links Dr. Guarnaccia to 4 more hospitals, 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. Joseph Blaise Guarnaccia's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Guarnaccia practices, 6 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 |
| +5 more affiliated sites | 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. Joseph Blaise Guarnaccia is one of 302 neurologists in Connecticut
Neurology is Dr. Guarnaccia's primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dmand AI has Dr. Guarnaccia's licenses on file in 2 states: Connecticut and Rhode Island.
Specialties and state licenses
- Neurology, ConnecticutPrimary
- Rhode Island license
Neurologists near Dr. Guarnaccia
Counts of neurologists 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. Joseph Blaise Guarnaccia billed Medicare for 371 services in 2024
CMS data shows 371 Medicare services from Dr. Guarnaccia across 3 procedure codes in 2024, all of them office visits, for 181 Medicare patients. Medicare paid $30,180 for them.
Dr. Guarnaccia's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4152024: 37111%
Where Dr. Guarnaccia's Medicare services took place, 2024
- In an office28477%
- In a facility8723%
Dr. Guarnaccia compared with the Connecticut median for neurologists, 2024
- Dr. Guarnaccia
- Connecticut median
- Medicare services
- 371vs 22366% above
- Medicare patients
- 181vs 15715% above
- Part D claims
- 7,359vs 24130.5 times
Medians across 293 neurologists in Connecticut with Dmand AI profiles that report each measure.
Dr. Guarnaccia'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Guarnaccia and other neurologists in Connecticut.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Joseph Blaise Guarnaccia treated 181 Medicare patients in 2024, average age 64
CMS counts 181 Medicare patients who saw Dr. Guarnaccia in 2024. The largest group is 65 to 74, with 81 patients. 62% of them have high cholesterol, and 61% have high blood pressure. 35% are also on Medicaid. Their average risk score is 1.51, 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. Guarnaccia's median patient age at 59, with 71% women.
Dr. Guarnaccia's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Guarnaccia's Medicare patients by sex, 2024
- Women12469%
- Men5731%
Chronic conditions among Dr. Guarnaccia's Medicare patients, 2024
- High cholesterol62%
- High blood pressure61%
- Mood disorders45%
- Depression41%
- Anxiety40%
- Arthritis38%
- Diabetes19%
- Asthma17%
Share of Medicare patients with each condition. A patient can have several.
Dr. Guarnaccia's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 59
Patient panel by sex, all payers
- Women71%
- Men27%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Joseph Blaise Guarnaccia wrote 7,739 Medicare Part D claims in 2024
In 2024, Dr. Guarnaccia wrote 7,739 Medicare Part D claims for 391 patients. 90% of them were for generic drugs. CMS names the drug for 7,359 of them, across 92 drugs with 11 or more claims each, at $4,885,729 in total drug cost. In 2023, CMS named 7,235 claims across 99 drugs.
Dr. Guarnaccia's Part D claims by kind of drug, 2024
- Generic6,933 claims90%
- Brand-name793 claims10%
- Other13 claims0%
Dr. Guarnaccia'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. Guarnaccia's Part D claims, 2024
- Antibiotics1%84 of 7,739 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: 7,2352024: 7,3592%
Drugs named by CMS: 92 in 2024, 99 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
Dr. Joseph Blaise Guarnaccia offers telehealth to Medicare patients
Dr. Guarnaccia accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Guarnaccia as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Joseph Blaise Guarnaccia received $692,103 in industry payments from 2016 to 2025
CMS Open Payments shows 882 general payments to Dr. Guarnaccia from 11 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 76% of the total. Biogen, Inc. paid the most, $184,431. It also lists 1 research payment totaling $11,040 in 2016.
General payments to Dr. Guarnaccia by program year, 2016 to 2025
General payments to Dr. Guarnaccia by kind, 2016 to 2025
- Speaker and faculty fees$524,74276%
- Consulting fees$110,05116%
- Travel and lodging$42,4326%
- Food and beverage$14,4282%
- Education$4500%
Companies that paid Dr. Guarnaccia 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. Joseph Blaise Guarnaccia graduated from University of Oklahoma College of Medicine
Dr. Guarnaccia graduated from University of Oklahoma College of Medicine in 1987.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Joseph Blaise Guarnaccia'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. Joseph Blaise Guarnaccia
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. Joseph Blaise Guarnaccia's NPI number?
Dr. Joseph Blaise Guarnaccia's NPI number is 1235164427. It was assigned on July 12, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Joseph Blaise Guarnaccia?
Dr. Joseph Blaise Guarnaccia is a neurologist in Derby, Connecticut. The primary specialty in the NPI Registry is Neurology Physician (taxonomy code 2084N0400X).
Where does Dr. Joseph Blaise Guarnaccia practice?
Dr. Guarnaccia practices at 130 Division St, Derby, CT 06418. Dr. Guarnaccia also practices at 144 Division St, Derby, CT 06418. Dr. Guarnaccia's primary practice is Griffin Hospital in Derby, Connecticut, part of Griffin Hospital. Dmand AI also links Dr. Guarnaccia to 4 hospitals.
What is Dr. Joseph Blaise Guarnaccia's office phone number?
The practice phone on file for Dr. Guarnaccia is (203) 732-7500.
What is Dr. Joseph Blaise Guarnaccia's medical license number?
Dr. Guarnaccia holds Connecticut license 031179, one of the licenses on file in 2 states.
Which states has Dr. Joseph Blaise Guarnaccia been licensed in?
Dmand AI has state licenses on file for Dr. Guarnaccia in Connecticut and Rhode Island.
Which hospitals is Dr. Joseph Blaise Guarnaccia affiliated with?
Dr. Guarnaccia practices at Griffin Hospital in Derby, Connecticut. Dr. Guarnaccia is also affiliated with Yale New Haven Hospital. Dmand AI links Dr. Guarnaccia to 4 more hospitals.
What medical group is Dr. Joseph Blaise Guarnaccia part of?
Dr. Guarnaccia is linked to Care New England Medical Group.
Does Dr. Joseph Blaise Guarnaccia accept Medicare?
Yes. CMS data shows Dr. Guarnaccia billed Medicare for 371 services in 2024, and Dr. Guarnaccia accepts Medicare assignment.
Does Dr. Joseph Blaise Guarnaccia offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Guarnaccia as offering telehealth services.
Show 6 more questionsShow fewer questions
How many Medicare patients does Dr. Joseph Blaise Guarnaccia see?
CMS counts 181 Medicare patients who saw Dr. Guarnaccia in 2024, with an average age of 64.
What services does Dr. Joseph Blaise Guarnaccia bill to Medicare?
In 2024, Dr. Guarnaccia's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and office visit, established patient (99212).
Where did Dr. Joseph Blaise Guarnaccia go to medical school?
Dr. Guarnaccia graduated from University of Oklahoma College of Medicine in 1987.
What drugs does Dr. Joseph Blaise Guarnaccia prescribe most?
In 2024 Medicare Part D data, Dr. Guarnaccia's most prescribed drugs by claims were Dextroamphetamine-Amphetamine, Gabapentin and Baclofen.
Has Dr. Joseph Blaise Guarnaccia received payments from drug or device companies?
CMS Open Payments shows $692,103 in general payments to Dr. Guarnaccia from 11 companies from 2016 to 2025. The largest total came from Biogen, Inc.
How long has Dr. Joseph Blaise Guarnaccia been practicing?
Dr. Guarnaccia graduated from medical school in 1987, 39 years ago.
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