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Dr. Timothy S. Loo, MD
NPI1871584813PAC ID4880766013
- Medicare services, 2024
- 1,323
- Medicare patients, 2024
- 397
- Part D claims, 2024
- 4,791
- Publications
- 1
- Hospital affiliations
- 6
- Practice address
- 330 Brookline Avenue, Boston, MA 02215
- Practice phone
- Call (617) 667-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Loo's professional email, personal email and mobile number
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Dr. Timothy S. Loo is an internist in Boston, Massachusetts
Dr. Loo practices at Beth Israel Deaconess Medical Center in Boston, Massachusetts, part of Beth Israel Lahey Health.
Dr. Loo's NPI, 1871584813, was assigned on October 31, 2005. Dr. Loo graduated from Johns Hopkins University School of Medicine in 1994. Dr. Loo holds Massachusetts license 215918.
NPI and contact details
- NPI
- 1871584813NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4880766013
- NPI enumeration date
- October 31, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (617) 667-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 58
- Medical school graduation
- 1994
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Timothy S. Loo practices at Beth Israel Deaconess Medical Center in Boston, Massachusetts
Dr. Loo's primary practice is Beth Israel Deaconess Medical Center, at 330 Brookline Avenue, Boston, MA 02215 in Suffolk County. The practice phone is (617) 667-7000.
- Beth Israel Deaconess Medical Center330 Brookline Avenue, Boston, MA 02215 · Suffolk CountyPhone(617) 667-7000
Source: Dmand AI Affiliation Data
Dr. Timothy S. Loo is affiliated with 7 sites of care and 2 medical groups
Dr. Loo's primary practice is Beth Israel Deaconess Medical Center in Boston, Massachusetts, part of Beth Israel Lahey Health. Dr. Loo is also affiliated with Brigham and Women's Hospital. The medical group on file is Harvard Medical Faculty Physicians at Beth Israel Deaconess Medical Center (HMFP). Dmand AI also links Dr. Loo to 4 more hospitals, 1 home health agency and 1 medical group, each named with a free account.
Brigham and Women's HospitalHarvard Medical Faculty Physicians at Beth Israel Deaconess Medical Center (HMFP)4 hospitalsNames with a free account1 home health agencyName with a free account1 medical groupName with a free account
See all 9 affiliations for Dr. LooSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Timothy S. Loo's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Loo practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Beth Israel Deaconess Medical Center | Available with a free account |
| +6 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Timothy S. Loo is one of 5,528 internists in Massachusetts
Internal medicine is Dr. Loo's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Loo is licensed in Massachusetts.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
Internists near Dr. Loo
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
5,528internists in Massachusetts1,712internists in Boston188internists at Beth Israel Deaconess Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Timothy S. Loo billed Medicare for 1,323 services in 2024
CMS data shows 1,323 Medicare services from Dr. Loo across 9 procedure codes in 2024, for 397 Medicare patients. Medicare paid $61,159 for them.
Medicare services, 20241,323
Medicare patients397
Paid by Medicare$61,159
Procedure codes9
Dr. Loo's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 6492024: 6815%
- Other services
- 2023: 352024: 6421734%
Where Dr. Loo's Medicare services took place, 2024
- In an office32725%
- In a facility99675%
Dr. Loo compared with the Massachusetts median for internists, 2024
- Dr. Loo
- Massachusetts median
- Medicare services
- 1,323vs 4313.1 times
- Medicare patients
- 397vs 1942.0 times
- Part D claims
- 4,198vs 40210.4 times
Medians across 5,369 internists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Loo'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. Loo?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Loo and other internists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Timothy S. Loo treated 397 Medicare patients in 2024, average age 74
CMS counts 397 Medicare patients who saw Dr. Loo in 2024. The largest group is 65 to 74, with 165 patients. 73% of them have high blood pressure, and 62% have high cholesterol. 28% are also on Medicaid. Their average risk score is 1.31, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Loo's median patient age at 66, with 48% women.
Medicare patients, 2024397
Average age74
Average risk score1.31
Also on Medicaid28%
Dr. Loo's Medicare patients by age, 2024
Dr. Loo's Medicare patients by sex, 2024
- Women20451%
- Men19349%
Chronic conditions among Dr. Loo's Medicare patients, 2024
- High blood pressure73%
- High cholesterol62%
- Arthritis39%
- Diabetes33%
- Anxiety23%
- Ischemic heart disease22%
- Mood disorders21%
- Chronic kidney disease20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Loo's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women48%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Timothy S. Loo wrote 4,791 Medicare Part D claims in 2024
In 2024, Dr. Loo wrote 4,791 Medicare Part D claims for 436 patients. 88% of them were for generic drugs. CMS names the drug for 4,198 of them, across 103 drugs with 11 or more claims each, at $408,375 in total drug cost. In 2023, CMS named 3,975 claims across 97 drugs.
Part D claims, 20244,791
Drugs named by CMS103
Total drug cost$408,375
Part D patients436
Dr. Loo's Part D claims by kind of drug, 2024
- Generic4,212 claims88%
- Brand-name549 claims11%
- Other30 claims1%
Dr. Loo'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. Loo's Part D claims, 2024
- Opioids3%130 of 4,791 claims
- Antibiotics1%46 of 4,791 claims
- Antipsychotics, patients 65 and over1%24 of 4,791 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3,9752024: 4,1986%
Drugs named by CMS: 103 in 2024, 97 in 2023.
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. Timothy S. Loo offers telehealth to Medicare patients
Dr. Loo accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Loo as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Timothy S. Loo has 1 publication on record
Dmand AI links 1 paper to Dr. Loo. Dr. Loo's most frequent co-authors are Carol K. Bates, MD and Lewis A. Lipsitz, MD.
Papers1
Dr. Loo's most frequent co-authors
Recent publications by Dr. Loo
See who Dr. Loo researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Loo works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Timothy S. Loo graduated from Johns Hopkins University School of Medicine
Dr. Loo graduated from Johns Hopkins University School of Medicine in 1994.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Timothy S. Loo'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)Doctors and Clinicians Utilization Data (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 |
| 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. Timothy S. Loo
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. Timothy S. Loo's NPI number?
Dr. Timothy S. Loo's NPI number is 1871584813. It was assigned on October 31, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Timothy S. Loo?
Dr. Timothy S. Loo is an internist in Boston, Massachusetts. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Timothy S. Loo practice?
Dr. Loo practices at 330 Brookline Avenue, Boston, MA 02215. Dr. Loo's primary practice is Beth Israel Deaconess Medical Center in Boston, Massachusetts, part of Beth Israel Lahey Health. Dmand AI also links Dr. Loo to 4 hospitals, 1 home health agency and 1 medical group.
What is Dr. Timothy S. Loo's office phone number?
The practice phone on file for Dr. Loo is (617) 667-7000.
What is Dr. Timothy S. Loo's medical license number?
Dr. Loo holds Massachusetts license 215918.
Which hospitals is Dr. Timothy S. Loo affiliated with?
Dr. Loo practices at Beth Israel Deaconess Medical Center in Boston, Massachusetts. Dr. Loo is also affiliated with Brigham and Women's Hospital. Dmand AI links Dr. Loo to 4 more hospitals.
What medical group is Dr. Timothy S. Loo part of?
Dr. Loo is linked to Harvard Medical Faculty Physicians at Beth Israel Deaconess Medical Center (HMFP). Dmand AI links Dr. Loo to 1 more medical group.
Does Dr. Timothy S. Loo accept Medicare?
Yes. CMS data shows Dr. Loo billed Medicare for 1,323 services in 2024, and Dr. Loo accepts Medicare assignment.
Does Dr. Timothy S. Loo offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Loo as offering telehealth services.
How many Medicare patients does Dr. Timothy S. Loo see?
CMS counts 397 Medicare patients who saw Dr. Loo in 2024, with an average age of 74.
Show 6 more questionsShow fewer questions
What services does Dr. Timothy S. Loo bill to Medicare?
In 2024, Dr. Loo's most billed Medicare services were medicare service (G2211), office visit, established patient (99214) and office visit, established patient (99213).
Where did Dr. Timothy S. Loo go to medical school?
Dr. Loo graduated from Johns Hopkins University School of Medicine in 1994.
What drugs does Dr. Timothy S. Loo prescribe most?
In 2024 Medicare Part D data, Dr. Loo's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Omeprazole.
How long has Dr. Timothy S. Loo been practicing?
Dr. Loo graduated from medical school in 1994, 32 years ago.
Does Dr. Timothy S. Loo do research?
Dmand AI links 1 publication to Dr. Loo.
Who does Dr. Timothy S. Loo publish with?
Dr. Loo's most frequent co-authors are Carol K. Bates, MD (1 shared paper) and Lewis A. Lipsitz, MD (1 shared paper).
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