Dr. Michael Thiim, MD
- Medicare services, 2024
- 849
- Medicare patients, 2024
- 532
- Part D claims, 2024
- 1,212
- Hospital affiliations
- 5
- Industry payments
- $13
- 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. Thiim's professional email, personal email and mobile number
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Dr. Michael Thiim is a gastroenterologist in Boston, Massachusetts
Dr. Thiim practices at Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham.
Dr. Thiim's NPI, 1902801509, was assigned on June 20, 2005. Dr. Thiim graduated from State University of New York at Stony Brook, School of Medicine in 1988. Dr. Thiim holds Massachusetts license 79926.
- NPI
- 1902801509NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5597714535
- NPI enumeration date
- June 20, 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
- Male
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael Thiim practices at Massachusetts General Hospital in Boston, Massachusetts
Dr. Thiim'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. Michael Thiim is affiliated with 8 sites of care and 4 medical groups
Dr. Thiim's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dr. Thiim is also affiliated with Brigham and Women's Hospital. The medical group on file is Massachusetts General Hospital. Dmand AI also links Dr. Thiim to 3 more hospitals, 3 medical groups, 2 group practices and clinics and 1 community health center, each named with a free account. Dr. Thiim'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. Michael Thiim's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Thiim practices, 8 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 |
| +7 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Michael Thiim is one of 597 gastroenterologists in Massachusetts
Gastroenterology is Dr. Thiim's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Thiim is licensed in Massachusetts.
Specialties and state licenses
- Gastroenterology, MassachusettsPrimary
Gastroenterologists near Dr. Thiim
Counts of gastroenterologists 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. Michael Thiim billed Medicare for 849 services in 2024
CMS data shows 849 Medicare services from Dr. Thiim across 14 procedure codes in 2024, for 532 Medicare patients. Medicare paid $78,504 for them.
Dr. Thiim's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3242024: 40425%
- Other services
- 2023: 3052024: 22726%
- Surgery
- 2023: 2292024: 2185%
Where Dr. Thiim's Medicare services took place, 2024
- In an office11614%
- In a facility73386%
Dr. Thiim compared with the Massachusetts median for gastroenterologists, 2024
- Dr. Thiim
- Massachusetts median
- Medicare services
- 849vs 51964% above
- Medicare patients
- 532vs 34355% above
- Part D claims
- 1,075vs 3003.6 times
Medians across 583 gastroenterologists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Thiim'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Thiim and other gastroenterologists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael Thiim treated 532 Medicare patients in 2024, average age 72
CMS counts 532 Medicare patients who saw Dr. Thiim in 2024. The largest group is 65 to 74, with 273 patients. 69% of them have high blood pressure, and 67% have high cholesterol. 19% are also on Medicaid. Their average risk score is 1.55, 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. Thiim's median patient age at 70, with 50% women.
Dr. Thiim's Medicare patients by age, 2024
Dr. Thiim's Medicare patients by sex, 2024
- Women28353%
- Men24947%
Chronic conditions among Dr. Thiim's Medicare patients, 2024
- High blood pressure69%
- High cholesterol67%
- Arthritis45%
- Anxiety32%
- Diabetes31%
- Mood disorders30%
- Ischemic heart disease28%
- Depression27%
Share of Medicare patients with each condition. A patient can have several.
Dr. Thiim'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
- Women50%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Michael Thiim wrote 1,212 Medicare Part D claims in 2024
In 2024, Dr. Thiim wrote 1,212 Medicare Part D claims for 419 patients. 87% of them were for generic drugs. CMS names the drug for 1,075 of them, across 22 drugs with 11 or more claims each, at $278,499 in total drug cost. In 2023, CMS named 737 claims across 19 drugs.
Dr. Thiim's Part D claims by kind of drug, 2024
- Generic1,049 claims87%
- Brand-name and other163 claims13%
Dr. Thiim'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. Thiim's Part D claims, 2024
- Antibiotics4%46 of 1,212 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: 7372024: 1,07546%
Drugs named by CMS: 22 in 2024, 19 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. Michael Thiim ranks in the 84th percentile for colonoscopy in Medicare
Dr. Thiim accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Thiim as offering telehealth. CMS counts 120 procedures of colonoscopy by Dr. Thiim, more than 84% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Thiim ranks in Medicare procedure volume
- Colonoscopy
- 84th percentile120 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 74th percentile89 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Michael Thiim received $13 in industry payments in 2019
CMS Open Payments shows 2 general payments to Dr. Thiim from 1 drug or device company in 2019. Education make up the largest share, 100% of the total. Travere Therapeutics, Inc. paid the most, $13.
Companies that paid Dr. Thiim the most, 2019 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Michael Thiim graduated from State University of New York at Stony Brook, School of Medicine
Dr. Thiim graduated from State University of New York at Stony Brook, School of Medicine in 1988.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Michael Thiim'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) |
| Industry payments | Open Payments (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. Michael Thiim
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. Michael Thiim's NPI number?
Dr. Michael Thiim's NPI number is 1902801509. It was assigned on June 20, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael Thiim?
Dr. Michael Thiim is a gastroenterologist in Boston, Massachusetts. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Michael Thiim practice?
Dr. Thiim practices at 55 Fruit Street, Boston, MA 02114. Dr. Thiim's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dmand AI also links Dr. Thiim to 3 hospitals, 3 medical groups, 2 group practices and clinics and 1 community health center.
What is Dr. Michael Thiim's office phone number?
The practice phone on file for Dr. Thiim is (617) 726-2000.
What is Dr. Michael Thiim's medical license number?
Dr. Thiim holds Massachusetts license 79926.
Which hospitals is Dr. Michael Thiim affiliated with?
Dr. Thiim practices at Massachusetts General Hospital in Boston, Massachusetts. Dr. Thiim is also affiliated with Brigham and Women's Hospital. Dmand AI links Dr. Thiim to 3 more hospitals.
What medical group is Dr. Michael Thiim part of?
Dr. Thiim is linked to Massachusetts General Hospital. Dmand AI links Dr. Thiim to 3 more medical groups.
Does Dr. Michael Thiim accept Medicare?
Yes. CMS data shows Dr. Thiim billed Medicare for 849 services in 2024, and Dr. Thiim accepts Medicare assignment.
Does Dr. Michael Thiim offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Thiim as offering telehealth services.
How many Medicare patients does Dr. Michael Thiim see?
CMS counts 532 Medicare patients who saw Dr. Thiim in 2024, with an average age of 72.
Show 5 more questionsShow fewer questions
What services does Dr. Michael Thiim bill to Medicare?
In 2024, Dr. Thiim's most billed Medicare services were office visit, established patient (99214), medicare service (G0500) and surgery: digestive system (45385).
Where did Dr. Michael Thiim go to medical school?
Dr. Thiim graduated from State University of New York at Stony Brook, School of Medicine in 1988.
What drugs does Dr. Michael Thiim prescribe most?
In 2024 Medicare Part D data, Dr. Thiim's most prescribed drugs by claims were Gavilyte-G, Ursodiol and Mycophenolate Mofetil.
Has Dr. Michael Thiim received payments from drug or device companies?
CMS Open Payments shows $13 in general payments to Dr. Thiim from 1 company from 2019 to 2019. The largest total came from Travere Therapeutics, Inc.
How long has Dr. Michael Thiim been practicing?
Dr. Thiim graduated from medical school in 1988, 38 years ago.
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