Dr. Gregory T. Maclennan, MD
- Medicare services, 2024
- 1,022
- Medicare patients, 2024
- 290
- MIPS score, 2024
- 81
- Hospital affiliations
- 5
- Medical group
- 1
- Practice address
- 11100 Euclid Avenue, Cleveland, OH 44106
- Practice phone
- Call (216) 844-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Maclennan'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. Gregory T. Maclennan is a pathologist in Cleveland, Ohio
Dr. Maclennan practices at University Hospitals Cleveland Medical Center in Cleveland, Ohio, part of University Hospitals Health System.
Dr. Maclennan's NPI, 1992731681, was assigned on June 24, 2006. Dr. Maclennan holds Ohio license 35068763.
- NPI
- 1992731681NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4385620236
- NPI enumeration date
- June 24, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (216) 844-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 81
- Medical school graduation
- 1971
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory T. Maclennan practices at University Hospitals Cleveland Medical Center in Cleveland, Ohio
Dr. Maclennan's primary practice is University Hospitals Cleveland Medical Center, at 11100 Euclid Avenue, Cleveland, OH 44106 in Cuyahoga County. The practice phone is (216) 844-1000.
- University Hospitals Cleveland Medical Center11100 Euclid Avenue, Cleveland, OH 44106 · Cuyahoga CountyPhone(216) 844-1000
Source: Dmand AI Affiliation Data
Dr. Gregory T. Maclennan is affiliated with 5 sites of care and 1 medical group
Dr. Maclennan's primary practice is University Hospitals Cleveland Medical Center in Cleveland, Ohio, part of University Hospitals Health System. Dr. Maclennan is also affiliated with University Hospitals Ahuja Medical Center. The medical group on file is University Hospitals Medical Practices. Dmand AI also links Dr. Maclennan to 3 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. Gregory T. Maclennan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Maclennan practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| University Hospitals Cleveland Medical Center | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory T. Maclennan is one of 83 pathologists in Ohio
Anatomic pathology is Dr. Maclennan's primary specialty in the NPI Registry, under taxonomy code 207ZP0101X. Dr. Maclennan is licensed in Ohio.
Specialties and state licenses
- Anatomic pathology, OhioPrimary
Pathologists near Dr. Maclennan
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. Gregory T. Maclennan billed Medicare for 1,022 services in 2024
CMS data shows 1,022 Medicare services from Dr. Maclennan across 11 procedure codes in 2024, for 290 Medicare patients. Medicare paid $36,532 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Maclennan's Medicare services by type, 2024
- Lab and pathology965
- Other services57
Dr. Maclennan compared with the Ohio median for pathologists, 2024
- Dr. Maclennan
- Ohio median
- Medicare services
- 1,022vs 77033% above
- Medicare patients
- 290vs 34416% below
Medians across 81 pathologists in Ohio with Dmand AI profiles that report each measure.
Dr. Maclennan'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. Gregory T. Maclennan treated 290 Medicare patients in 2024, average age 75
CMS counts 290 Medicare patients who saw Dr. Maclennan in 2024. The largest group is 65 to 74, with 137 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.53, 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. Maclennan's median patient age at 70, with 31% women.
Dr. Maclennan's Medicare patients by age, 2024
Dr. Maclennan's Medicare patients by sex, 2024
- Women8429%
- Men20671%
Chronic conditions among Dr. Maclennan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis48%
- Cancer48%
- Ischemic heart disease46%
- COPD34%
- Chronic kidney disease32%
- Diabetes32%
Share of Medicare patients with each condition. A patient can have several.
Dr. Maclennan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women31%
- Men69%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory T. Maclennan scored 81 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 81 out of 100 for Dr. Maclennan for performance year 2024, reported as part of a group. Dr. Maclennan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Maclennan's MIPS scores, performance year 2024
- 81of 100Final score
- 63.1of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 74of 100Cost
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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Sources for Dr. Gregory T. Maclennan'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) |
| 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. Gregory T. Maclennan
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. Gregory T. Maclennan's NPI number?
Dr. Gregory T. Maclennan's NPI number is 1992731681. It was assigned on June 24, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory T. Maclennan?
Dr. Gregory T. Maclennan is a pathologist in Cleveland, Ohio. The primary specialty in the NPI Registry is Anatomic Pathology Physician (taxonomy code 207ZP0101X).
Where does Dr. Gregory T. Maclennan practice?
Dr. Maclennan practices at 11100 Euclid Avenue, Cleveland, OH 44106. Dr. Maclennan's primary practice is University Hospitals Cleveland Medical Center in Cleveland, Ohio, part of University Hospitals Health System. Dmand AI also links Dr. Maclennan to 3 hospitals.
What is Dr. Gregory T. Maclennan's office phone number?
The practice phone on file for Dr. Maclennan is (216) 844-1000.
What is Dr. Gregory T. Maclennan's medical license number?
Dr. Maclennan holds Ohio license 35068763.
Which hospitals is Dr. Gregory T. Maclennan affiliated with?
Dr. Maclennan practices at University Hospitals Cleveland Medical Center in Cleveland, Ohio. Dr. Maclennan is also affiliated with University Hospitals Ahuja Medical Center. Dmand AI links Dr. Maclennan to 3 more hospitals.
What medical group is Dr. Gregory T. Maclennan part of?
Dr. Maclennan is linked to University Hospitals Medical Practices.
Does Dr. Gregory T. Maclennan accept Medicare?
Yes. CMS data shows Dr. Maclennan billed Medicare for 1,022 services in 2024, and Dr. Maclennan accepts Medicare assignment.
What is Dr. Gregory T. Maclennan's MIPS score?
Dr. Maclennan's MIPS final score for performance year 2024 is 81 out of 100, reported as part of a group.
How many Medicare patients does Dr. Gregory T. Maclennan see?
CMS counts 290 Medicare patients who saw Dr. Maclennan in 2024, with an average age of 75.
What services does Dr. Gregory T. Maclennan bill to Medicare?
In 2024, Dr. Maclennan's most billed Medicare services were lab and pathology test (88305), lab and pathology test (88112) and lab and pathology test (88341).
How long has Dr. Gregory T. Maclennan been practicing?
Dr. Maclennan graduated from medical school in 1971, 55 years ago.
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