Dr. Gary A. Letts, MD
- Medicare services, 2024
- 1,046
- Medicare patients, 2024
- 687
- MIPS score, 2024
- 86
- Hospital affiliations
- 1
- Medical groups
- 5
- Practice address
- 5 Perryridge Rd, Greenwich, CT 06830
- Practice phone
- Call (203) 863-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Letts' professional email, personal email and mobile number
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Dr. Gary A. Letts is a pathologist in Greenwich, Connecticut
Dr. Letts practices at Greenwich Hospital in Greenwich, Connecticut, part of Yale New Haven Health System.
Dr. Letts' NPI, 1124235437, was assigned on May 17, 2007. Dr. Letts graduated from David Geffen School of Medicine at UCLA in 1996. Dr. Letts holds Connecticut license 043041.
- NPI
- 1124235437NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0547254039
- NPI enumeration date
- May 17, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (203) 863-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 56
- Medical school graduation
- 1996
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gary A. Letts practices at Greenwich Hospital in Greenwich, Connecticut
Dr. Letts' primary practice is Greenwich Hospital, at 5 Perryridge Rd, Greenwich, CT 06830 in Fairfield County. The practice phone is (203) 863-3000.
- Greenwich Hospital5 Perryridge Rd, Greenwich, CT 06830 · Fairfield CountyPhone(203) 863-3000
Source: Dmand AI Affiliation Data
Dr. Gary A. Letts is affiliated with 3 sites of care and 5 medical groups
Dr. Letts' primary practice is Greenwich Hospital in Greenwich, Connecticut, part of Yale New Haven Health System. The medical group on file is Greenwich Pathology Associates. Dmand AI also links Dr. Letts to 4 more medical groups, 1 physician office and 1 group practice or clinic, 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. Gary A. Letts' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Letts practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Greenwich Hospital | Available with a free account |
| +2 more sites and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gary A. Letts is one of 157 pathologists in Connecticut
Anatomic pathology and clinical pathology is Dr. Letts' primary specialty in the NPI Registry, under taxonomy code 207ZP0102X. Dmand AI has Dr. Letts' licenses on file in 5 states: Connecticut, California, North Carolina, New York and Virginia.
Specialties and state licenses
- Anatomic pathology and clinical pathology, ConnecticutPrimary
- California license
- North Carolina license
- Dermatopathology (pathology), New York
- Virginia license
Pathologists near Dr. Letts
Counts of pathologists 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. Gary A. Letts billed Medicare for 1,046 services in 2024
CMS data shows 1,046 Medicare services from Dr. Letts across 4 procedure codes in 2024, for 687 Medicare patients. Medicare paid $65,688 for them. Every service was in an office.
Dr. Letts' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Lab and pathology
- 2023: 1,4022024: 1,04625%
Dr. Letts compared with the Connecticut median for pathologists, 2024
- Dr. Letts
- Connecticut median
- Medicare services
- 1,046vs 9846% above
- Medicare patients
- 687vs 36290% above
Medians across 163 pathologists in Connecticut with Dmand AI profiles that report each measure.
Dr. Letts' 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. Letts and other pathologists in Connecticut.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gary A. Letts treated 687 Medicare patients in 2024, average age 77
CMS counts 687 Medicare patients who saw Dr. Letts in 2024. The largest group is 65 to 74, with 266 patients. 75% of them have high cholesterol, and 73% have high blood pressure. 8% are also on Medicaid. Their average risk score is 1.05, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Letts' median patient age at 60, with 33% women.
Dr. Letts' Medicare patients by age, 2024
Dr. Letts' Medicare patients by sex, 2024
- Women30945%
- Men37855%
Chronic conditions among Dr. Letts' Medicare patients, 2024
- High cholesterol75%
- High blood pressure73%
- Arthritis46%
- Ischemic heart disease32%
- Diabetes27%
- Cancer22%
- Atrial fibrillation19%
- Anxiety18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Letts' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 60
Patient panel by sex, all payers
- Women33%
- Men63%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gary A. Letts scored 86 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 86 out of 100 for Dr. Letts for performance year 2024, reported as part of a group. Dr. Letts accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Letts' MIPS scores, performance year 2024
- 86of 100Final score
- 72.5of 100Quality
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Gary A. Letts graduated from David Geffen School of Medicine at UCLA
Dr. Letts graduated from David Geffen School of Medicine at UCLA in 1996.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gary A. Letts'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (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. Gary A. Letts
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. Gary A. Letts' NPI number?
Dr. Gary A. Letts' NPI number is 1124235437. It was assigned on May 17, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Gary A. Letts?
Dr. Gary A. Letts is a pathologist in Greenwich, Connecticut. The primary specialty in the NPI Registry is Anatomic Pathology & Clinical Pathology Physician (taxonomy code 207ZP0102X).
Where does Dr. Gary A. Letts practice?
Dr. Letts practices at 5 Perryridge Rd, Greenwich, CT 06830. Dr. Letts' primary practice is Greenwich Hospital in Greenwich, Connecticut, part of Yale New Haven Health System. Dmand AI also links Dr. Letts to 4 medical groups, 1 physician office and 1 group practice or clinic.
What is Dr. Gary A. Letts' office phone number?
The practice phone on file for Dr. Letts is (203) 863-3000.
What is Dr. Gary A. Letts' medical license number?
Dr. Letts holds Connecticut license 043041, one of the licenses on file in 5 states.
Which states has Dr. Gary A. Letts been licensed in?
Dmand AI has state licenses on file for Dr. Letts in Connecticut, California, North Carolina, New York and Virginia.
Which hospitals is Dr. Gary A. Letts affiliated with?
Dr. Letts practices at Greenwich Hospital in Greenwich, Connecticut.
What medical group is Dr. Gary A. Letts part of?
Dr. Letts is linked to Greenwich Pathology Associates. Dmand AI links Dr. Letts to 4 more medical groups.
Does Dr. Gary A. Letts accept Medicare?
Yes. CMS data shows Dr. Letts billed Medicare for 1,046 services in 2024, and Dr. Letts accepts Medicare assignment.
What is Dr. Gary A. Letts' MIPS score?
Dr. Letts' MIPS final score for performance year 2024 is 86 out of 100, reported as part of a group.
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How many Medicare patients does Dr. Gary A. Letts see?
CMS counts 687 Medicare patients who saw Dr. Letts in 2024, with an average age of 77.
What services does Dr. Gary A. Letts bill to Medicare?
In 2024, Dr. Letts' most billed Medicare services were lab and pathology test (88305), lab and pathology test (88342) and lab and pathology test (88312).
Where did Dr. Gary A. Letts go to medical school?
Dr. Letts graduated from David Geffen School of Medicine at UCLA in 1996.
How long has Dr. Gary A. Letts been practicing?
Dr. Letts graduated from medical school in 1996, 30 years ago.
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