Dr. William Gray, MD
- Medicare services, 2024
- 3,444
- Medicare patients, 2024
- 620
- Part D claims, 2024
- 104
- MIPS score, 2024
- 100
- Hospital affiliations
- 2
- Practice address
- 56 Franklin Street, Waterbury, CT 06706
- Practice phone
- Call (203) 709-6020
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Gray's professional email, personal email and mobile number
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Dr. William Gray is an internist in Waterbury, Connecticut
Dr. Gray practices at Saint Mary's Hospital in Waterbury, Connecticut, part of Trinity Health.
Dr. Gray's NPI, 1033402862, was assigned on May 26, 2011. Dr. Gray holds Connecticut license 51115.
- NPI
- 1033402862NPI Registry (opens in a new tab)
- NPI enumeration date
- May 26, 2011
- NPI status
- Active
- Practice phone
- (203) 709-6020
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. William Gray practices at Saint Mary's Hospital in Waterbury, Connecticut
Dr. Gray's primary practice is Saint Mary's Hospital, at 56 Franklin Street, Waterbury, CT 06706 in New Haven County. The practice phone is (203) 709-6020.
- Saint Mary's Hospital56 Franklin Street, Waterbury, CT 06706 · New Haven CountyPhone(203) 709-6020
Source: Dmand AI Affiliation Data
Dr. William Gray is affiliated with 4 sites of care and 3 medical groups
Dr. Gray's primary practice is Saint Mary's Hospital in Waterbury, Connecticut, part of Trinity Health. Dr. Gray is also affiliated with Griffin Hospital. The medical group on file is Sound Physicians. Dmand AI also links Dr. Gray to 2 more medical groups, 1 group practice or clinic and 1 hospital outpatient department, 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. William Gray's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gray practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Saint Mary's Hospital | Available with a free account |
| +3 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William Gray is one of 2,189 internists in Connecticut
Internal medicine is Dr. Gray's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Gray is licensed in Connecticut.
Specialties and state licenses
- Internal medicine, ConnecticutPrimary
Internists near Dr. Gray
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. William Gray billed Medicare for 3,444 services in 2024
CMS data shows 3,444 Medicare services from Dr. Gray across 4 procedure codes in 2024, for 620 Medicare patients. Medicare paid $227,984 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Gray's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4,3402024: 3,44421%
Dr. Gray compared with the Connecticut median for internists, 2024
- Dr. Gray
- Connecticut median
- Medicare services
- 3,444vs 3908.8 times
- Medicare patients
- 620vs 1723.6 times
- Part D claims
- 49vs 34386% below
Medians across 2,185 internists in Connecticut with Dmand AI profiles that report each measure.
Dr. Gray'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. William Gray treated 620 Medicare patients in 2024, average age 82
CMS counts 620 Medicare patients who saw Dr. Gray in 2024. The largest group is 85 and over, with 282 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 66% are also on Medicaid. Their average risk score is 2.57, 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. Gray's median patient age at 79, with 53% women.
Dr. Gray's Medicare patients by age, 2024
Dr. Gray's Medicare patients by sex, 2024
- Women36058%
- Men26042%
Chronic conditions among Dr. Gray's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Mood disorders70%
- Anxiety65%
- Depression63%
- Arthritis57%
- Alzheimer's and dementia56%
- Heart failure49%
Share of Medicare patients with each condition. A patient can have several.
Dr. Gray's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 79
Patient panel by sex, all payers
- Women53%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William Gray wrote 104 Medicare Part D claims in 2024
In 2024, Dr. Gray wrote 104 Medicare Part D claims for 47 patients. 86% of them were for generic drugs. CMS names the drug for 49 of them, across 3 drugs with 11 or more claims each, at $791 in total drug cost. In 2019, CMS named 238 claims across 8 drugs.
Dr. Gray's Part D claims by kind of drug, 2024
- Generic89 claims86%
- Brand-name15 claims14%
Dr. Gray'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.
Part D claims for drugs CMS names, 2019 to 2024
- 2019
- 2024
- Claims for drugs CMS names
- 2019: 2382024: 4979%
Drugs named by CMS: 3 in 2024, 8 in 2019.
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. William Gray scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Gray for performance year 2024, reported as part of a group.
Dr. Gray's MIPS scores, performance year 2024
- 100of 100Final score
- 95of 100Quality
- 40of 100Improvement Activities
- 77of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. William Gray received $3,082 in industry payments from 2016 to 2025
CMS Open Payments shows 120 general payments to Dr. Gray from 25 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 98% of the total. Organogenesis Inc. paid the most, $662.
General payments to Dr. Gray by program year, 2016 to 2025
General payments to Dr. Gray by kind, 2016 to 2025
- Food and beverage$3,02698%
- Travel and lodging$562%
Companies that paid Dr. Gray the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. William Gray'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 | Dmand AI Affiliation 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 | Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. William Gray
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. William Gray's NPI number?
Dr. William Gray's NPI number is 1033402862. It was assigned on May 26, 2011, and it is active in the NPI Registry.
What kind of doctor is Dr. William Gray?
Dr. William Gray is an internist in Waterbury, Connecticut. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. William Gray practice?
Dr. Gray practices at 56 Franklin Street, Waterbury, CT 06706. Dr. Gray's primary practice is Saint Mary's Hospital in Waterbury, Connecticut, part of Trinity Health. Dmand AI also links Dr. Gray to 2 medical groups, 1 group practice or clinic and 1 hospital outpatient department.
What is Dr. William Gray's office phone number?
The practice phone on file for Dr. Gray is (203) 709-6020.
What is Dr. William Gray's medical license number?
Dr. Gray holds Connecticut license 51115.
Which hospitals is Dr. William Gray affiliated with?
Dr. Gray practices at Saint Mary's Hospital in Waterbury, Connecticut. Dr. Gray is also affiliated with Griffin Hospital.
What medical group is Dr. William Gray part of?
Dr. Gray is linked to Sound Physicians. Dmand AI links Dr. Gray to 2 more medical groups.
Does Dr. William Gray accept Medicare?
Yes. CMS data shows Dr. Gray billed Medicare for 3,444 services in 2024.
What is Dr. William Gray's MIPS score?
Dr. Gray's MIPS final score for performance year 2024 is 100 out of 100, reported as part of a group.
How many Medicare patients does Dr. William Gray see?
CMS counts 620 Medicare patients who saw Dr. Gray in 2024, with an average age of 82.
Show 4 more questionsShow fewer questions
What services does Dr. William Gray bill to Medicare?
In 2024, Dr. Gray's most billed Medicare services were nursing facility care (99308), nursing facility care (99309) and nursing facility care (99305).
What drugs does Dr. William Gray prescribe most?
In 2024 Medicare Part D data, Dr. Gray's most prescribed drugs by claims were Clotrimazole-Betamethasone, Silver Sulfadiazine and Mupirocin.
Has Dr. William Gray received payments from drug or device companies?
CMS Open Payments shows $3,082 in general payments to Dr. Gray from 25 companies from 2016 to 2025. The largest total came from Organogenesis Inc.
How long has Dr. William Gray been practicing?
Dr. Gray's NPI was assigned in 2011.
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