Dr. Gregory J. Lines, MD
- Medicare services, 2024
- 259
- Medicare patients, 2024
- 136
- Part D claims, 2024
- 36
- Publications
- 1
- MIPS score, 2024
- 91
- Practice address
- 1493 Cambridge Street, Cambridge, MA 02139
- Practice phone
- Call (617) 665-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Lines' 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 J. Lines is an internist in Cambridge, Massachusetts
Dr. Lines practices at CHA Cambridge Hospital in Cambridge, Massachusetts, part of Cambridge Health Alliance.
Dr. Lines' NPI, 1053842773, was assigned on March 23, 2017. Dr. Lines holds Massachusetts license 282252.
- NPI
- 1053842773NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8325319684
- NPI enumeration date
- March 23, 2017
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (617) 665-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 35
- Medical school graduation
- 2017
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory J. Lines practices at CHA Cambridge Hospital in Cambridge, Massachusetts
Dr. Lines' primary practice is CHA Cambridge Hospital, at 1493 Cambridge Street, Cambridge, MA 02139 in Middlesex County. The practice phone is (617) 665-1000.
- CHA Cambridge Hospital1493 Cambridge Street, Cambridge, MA 02139 · Middlesex CountyPhone(617) 665-1000
Source: Dmand AI Affiliation Data
Dr. Gregory J. Lines is affiliated with 1 site of care and 1 medical group
Dr. Lines' primary practice is CHA Cambridge Hospital in Cambridge, Massachusetts, part of Cambridge Health Alliance. The medical group on file is Cambridge Health Alliance. Dr. Lines' employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gregory J. Lines' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lines practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| CHA Cambridge Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory J. Lines is one of 5,528 internists in Massachusetts
Internal medicine is Dr. Lines' primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Lines is licensed in Massachusetts.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
Internists near Dr. Lines
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. Gregory J. Lines billed Medicare for 259 services in 2024
CMS data shows 259 Medicare services from Dr. Lines across 7 procedure codes in 2024, for 136 Medicare patients. Medicare paid $24,904 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Lines' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2392024: 2598%
Dr. Lines compared with the Massachusetts median for internists, 2024
- Dr. Lines
- Massachusetts median
- Medicare services
- 259vs 43140% below
- Medicare patients
- 136vs 19430% below
- Part D claims
- 11vs 40297% below
Medians across 5,369 internists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Lines' 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. Lines and other internists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory J. Lines treated 136 Medicare patients in 2024, average age 74
CMS counts 136 Medicare patients who saw Dr. Lines in 2024. The largest group is 65 to 74, with 57 patients. 75% of them have high blood pressure, and 73% have high cholesterol. 69% are also on Medicaid. Their average risk score is 2.15, 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. Lines' median patient age at 60, with 47% women.
Dr. Lines' Medicare patients by age, 2024
Dr. Lines' Medicare patients by sex, 2024
- Women7958%
- Men5742%
Chronic conditions among Dr. Lines' Medicare patients, 2024
- High blood pressure75%
- High cholesterol73%
- Mood disorders59%
- Depression57%
- Anxiety53%
- Ischemic heart disease49%
- Chronic kidney disease48%
- Heart failure46%
Share of Medicare patients with each condition. A patient can have several.
Dr. Lines' 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
- Women47%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory J. Lines wrote 36 Medicare Part D claims in 2024
In 2024, Dr. Lines wrote 36 Medicare Part D claims for 13 patients. 81% of them were for generic drugs. CMS names the drug for 11 of them, across 1 drug with 11 or more claims each, at $431 in total drug cost. In 2022, CMS named 25 claims across 2 drugs.
Dr. Lines' Part D claims by kind of drug, 2024
- Generic29 claims81%
- Brand-name and other7 claims19%
Dr. Lines' most prescribed drugs by claims, 2023
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, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 252023: 1156%
Drugs named by CMS: 1 in 2023, 2 in 2022.
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. Gregory J. Lines scored 91 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 91 out of 100 for Dr. Lines for performance year 2024, reported as part of a group. Dr. Lines accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Lines' MIPS scores, performance year 2024
- 91of 100Final score
- 77.5of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 77of 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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Dr. Gregory J. Lines has 1 publication on record
Dmand AI links 1 paper to Dr. Lines in 2021. Dr. Lines' most frequent co-author is Erica Dwyer, MD, PhD.
Dr. Lines' most frequent co-authors
Recent publications by Dr. Lines
See who Dr. Lines researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Lines works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Sources for Dr. Gregory J. Lines'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 | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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 J. Lines
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 J. Lines' NPI number?
Dr. Gregory J. Lines' NPI number is 1053842773. It was assigned on March 23, 2017, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory J. Lines?
Dr. Gregory J. Lines is an internist in Cambridge, Massachusetts. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Gregory J. Lines practice?
Dr. Lines practices at 1493 Cambridge Street, Cambridge, MA 02139. Dr. Lines' primary practice is CHA Cambridge Hospital in Cambridge, Massachusetts, part of Cambridge Health Alliance.
What is Dr. Gregory J. Lines' office phone number?
The practice phone on file for Dr. Lines is (617) 665-1000.
What is Dr. Gregory J. Lines' medical license number?
Dr. Lines holds Massachusetts license 282252.
Which hospitals is Dr. Gregory J. Lines affiliated with?
Dr. Lines practices at CHA Cambridge Hospital in Cambridge, Massachusetts.
What medical group is Dr. Gregory J. Lines part of?
Dr. Lines is linked to Cambridge Health Alliance.
Does Dr. Gregory J. Lines accept Medicare?
Yes. CMS data shows Dr. Lines billed Medicare for 259 services in 2024, and Dr. Lines accepts Medicare assignment.
What is Dr. Gregory J. Lines' MIPS score?
Dr. Lines' MIPS final score for performance year 2024 is 91 out of 100, reported as part of a group.
How many Medicare patients does Dr. Gregory J. Lines see?
CMS counts 136 Medicare patients who saw Dr. Lines in 2024, with an average age of 74.
Show 5 more questionsShow fewer questions
What services does Dr. Gregory J. Lines bill to Medicare?
In 2024, Dr. Lines' most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99223) and hospital inpatient care (99239).
What drugs does Dr. Gregory J. Lines prescribe most?
In 2023 Medicare Part D data, Dr. Lines' most prescribed drugs by claims were Buprenorphine-Naloxone.
How long has Dr. Gregory J. Lines been practicing?
Dr. Lines graduated from medical school in 2017, 9 years ago.
Does Dr. Gregory J. Lines do research?
Dmand AI links 1 publication to Dr. Lines.
Who does Dr. Gregory J. Lines publish with?
Dr. Lines' most frequent co-authors are Erica Dwyer, MD, PhD (1 shared paper).
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