Dr. Diane Cecilia Greer, MD
- Medicare services, 2024
- 323
- Medicare patients, 2024
- 60
- Part D claims, 2024
- 2,068
- Hospital affiliations
- 1
- Medical groups
- 2
- Practice address
- 55 Fruit Street, Boston, MA 02114
- Practice phone
- Call (617) 726-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Greer'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. Diane Cecilia Greer is a geriatric psychiatry physician in Boston, Massachusetts
Dr. Greer practices at Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham.
Dr. Greer's NPI, 1225019151, was assigned on November 8, 2005. Dr. Greer graduated from University of Pittsburgh School of Medicine in 1987. Dr. Greer holds Massachusetts license 71019.
- NPI
- 1225019151NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4284651134
- NPI enumeration date
- November 8, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (617) 726-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- 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. Diane Cecilia Greer practices at Massachusetts General Hospital in Boston, Massachusetts
Dr. Greer's primary practice is Massachusetts General Hospital, at 55 Fruit Street, Boston, MA 02114 in Suffolk County. The practice phone is (617) 726-2000.
- Massachusetts General Hospital55 Fruit Street, Boston, MA 02114 · Suffolk CountyPhone(617) 726-2000
Source: Dmand AI Affiliation Data
Dr. Diane Cecilia Greer is affiliated with 2 sites of care and 2 medical groups
Dr. Greer's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. The medical group on file is Massachusetts General Hospital. Dmand AI also links Dr. Greer to 1 more community health center and 1 medical group, each named with a free account. Dr. Greer's 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. Diane Cecilia Greer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Greer practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Massachusetts General Hospital | Available with a free account |
| +1 more site and 1 medical group | 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 Mass General Brigham and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Diane Cecilia Greer is one of 29 geriatric psychiatry physicians in Massachusetts
Geriatric psychiatry is Dr. Greer's primary specialty in the NPI Registry, under taxonomy code 2084P0805X. Dr. Greer is licensed in Massachusetts.
Specialties and state licenses
- Geriatric psychiatry, MassachusettsPrimary
Geriatric psychiatry physicians near Dr. Greer
Counts of geriatric psychiatry physicians 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. Diane Cecilia Greer billed Medicare for 323 services in 2024
CMS data shows 323 Medicare services from Dr. Greer across 4 procedure codes in 2024, for 60 Medicare patients. Medicare paid $24,894 for them. Every service was in an office.
Dr. Greer compared with the Massachusetts median for geriatric psychiatry physicians, 2024
- Dr. Greer
- Massachusetts median
- Medicare services
- 323vs 27219% above
- Medicare patients
- 60vs 7520% below
- Part D claims
- 1,889vs 12615.0 times
Medians across 34 geriatric psychiatry physicians in Massachusetts with Dmand AI profiles that report each measure.
Dr. Greer'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.
Need commercial claims for Dr. Greer?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Greer and other geriatric psychiatry physicians in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Diane Cecilia Greer treated 60 Medicare patients in 2024, average age 67
CMS counts 60 Medicare patients who saw Dr. Greer in 2024. The largest group is 65 to 74, with 26 patients. 75% of them have anxiety, and 75% have mood disorders. 82% are also on Medicaid. Their average risk score is 1.57, 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. Greer's median patient age at 63, with 77% women.
Dr. Greer's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Greer's Medicare patients by sex, 2024
- Women4270%
- Men1830%
Chronic conditions among Dr. Greer's Medicare patients, 2024
- Anxiety75%
- Mood disorders75%
- Depression67%
- High cholesterol58%
- High blood pressure57%
- Diabetes43%
- Arthritis35%
- Bipolar disorder25%
Share of Medicare patients with each condition. A patient can have several.
Dr. Greer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women77%
- Men23%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Diane Cecilia Greer wrote 2,068 Medicare Part D claims in 2024
In 2024, Dr. Greer wrote 2,068 Medicare Part D claims for 181 patients. 93% of them were for generic drugs. CMS names the drug for 1,889 of them, across 42 drugs with 11 or more claims each, at $148,760 in total drug cost.
Dr. Greer's Part D claims by kind of drug, 2024
- Generic1,933 claims93%
- Brand-name135 claims7%
Dr. Greer'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. Greer's Part D claims, 2024
- Antipsychotics, patients 65 and over7%140 of 2,068 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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. Diane Cecilia Greer offers telehealth to Medicare patients
Dr. Greer accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Greer as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Diane Cecilia Greer graduated from University of Pittsburgh School of Medicine
Dr. Greer graduated from University of Pittsburgh School of Medicine in 1987.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Diane Cecilia Greer'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) |
| 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. Diane Cecilia Greer
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. Diane Cecilia Greer's NPI number?
Dr. Diane Cecilia Greer's NPI number is 1225019151. It was assigned on November 8, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Diane Cecilia Greer?
Dr. Diane Cecilia Greer is a geriatric psychiatry physician in Boston, Massachusetts. The primary specialty in the NPI Registry is Geriatric Psychiatry Physician (taxonomy code 2084P0805X).
Where does Dr. Diane Cecilia Greer practice?
Dr. Greer practices at 55 Fruit Street, Boston, MA 02114. Dr. Greer's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dmand AI also links Dr. Greer to 1 community health center and 1 medical group.
What is Dr. Diane Cecilia Greer's office phone number?
The practice phone on file for Dr. Greer is (617) 726-2000.
What is Dr. Diane Cecilia Greer's medical license number?
Dr. Greer holds Massachusetts license 71019.
Which hospitals is Dr. Diane Cecilia Greer affiliated with?
Dr. Greer practices at Massachusetts General Hospital in Boston, Massachusetts.
What medical group is Dr. Diane Cecilia Greer part of?
Dr. Greer is linked to Massachusetts General Hospital. Dmand AI links Dr. Greer to 1 more medical group.
Does Dr. Diane Cecilia Greer accept Medicare?
Yes. CMS data shows Dr. Greer billed Medicare for 323 services in 2024, and Dr. Greer accepts Medicare assignment.
Does Dr. Diane Cecilia Greer offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Greer as offering telehealth services.
How many Medicare patients does Dr. Diane Cecilia Greer see?
CMS counts 60 Medicare patients who saw Dr. Greer in 2024, with an average age of 67.
Show 4 more questionsShow fewer questions
What services does Dr. Diane Cecilia Greer bill to Medicare?
In 2024, Dr. Greer's most billed Medicare services were care management and other visits (99443), office visit, established patient (99214) and office visit, established patient (99213).
Where did Dr. Diane Cecilia Greer go to medical school?
Dr. Greer graduated from University of Pittsburgh School of Medicine in 1987.
What drugs does Dr. Diane Cecilia Greer prescribe most?
In 2024 Medicare Part D data, Dr. Greer's most prescribed drugs by claims were Clonazepam, Trazodone HCl and Lorazepam.
How long has Dr. Diane Cecilia Greer been practicing?
Dr. Greer graduated from medical school in 1987, 39 years ago.
Selling to geriatric psychiatry practices?
See geriatric psychiatry physicians in Massachusetts by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card