A fatal case of iatrogenic hypercalcemia after calcium channel blocker overdose (opens in a new tab)
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Dr. Michael T. Sim, MD
NPI1811972771PAC ID5092780460
- Medicare services, 2024
- 836
- Medicare patients, 2024
- 273
- Part D claims, 2024
- 1,098
- Publications
- 1
- MIPS score, 2024
- 83
- Practice address
- 2315 Stockton Boulevard, Sacramento, CA 95817
- Practice phone
- Call (916) 734-2011
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Sim'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. Michael T. Sim is a nephrologist in Sacramento, California
Dr. Sim practices at UC Davis Medical Center in Sacramento, California, part of University of California Health.
Dr. Sim's NPI, 1811972771, was assigned on December 13, 2005. Dr. Sim graduated from Tufts University School Of Medicine in 2001. Dr. Sim's California license number on file is A86300.
NPI and contact details
- NPI
- 1811972771NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5092780460
- NPI enumeration date
- December 13, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (916) 734-2011
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 51
- Medical school graduation
- 2001
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael T. Sim practices at UC Davis Medical Center in Sacramento, California
Dr. Sim's primary practice is UC Davis Medical Center, at 2315 Stockton Boulevard, Sacramento, CA 95817 in Sacramento County. The practice phone is (916) 734-2011.
- UC Davis Medical Center2315 Stockton Boulevard, Sacramento, CA 95817 · Sacramento CountyPhone(916) 734-2011
Source: Dmand AI Affiliation Data
Dr. Michael T. Sim is affiliated with 4 sites of care and 1 medical group
Dr. Sim's primary practice is UC Davis Medical Center in Sacramento, California, part of University of California Health. Dr. Sim is also affiliated with Kaiser Permanente South Sacramento Medical Center. The medical group on file is UC Davis Medical Group. Dmand AI also links Dr. Sim to 2 more hospitals, each named with a free account.
Kaiser Permanente South Sacramento Medical CenterUC Davis Medical Group2 hospitalsNames with a free account
See all 5 affiliations for Dr. SimSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Michael T. Sim's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Sim practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UC Davis Medical Center | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every hospital where Dr. Sim practices
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Dr. Michael T. Sim is one of 1,401 nephrologists in California
Nephrology is Dr. Sim's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Sim is board certified in nephrology by the American Board of Internal Medicine. Dr. Sim has a license on file in California.
Specialties and state licenses
- Nephrology, CaliforniaPrimary
Clinical focus
Dmand AI lists acute kidney failure, chronic kidney disease, kidney cysts and kidney disease among the conditions Dr. Sim treats.
Nephrologists near Dr. Sim
Counts of nephrologists with a Dmand AI profile, by place and practice. Each opens the list.
1,401nephrologists in California51nephrologists in Sacramento14nephrologists at UC Davis Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Michael T. Sim billed Medicare for 836 services in 2024
CMS data shows 836 Medicare services from Dr. Sim across 6 procedure codes in 2024, for 273 Medicare patients. Medicare paid $43,157 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024836
Medicare patients273
Paid by Medicare$43,157
Procedure codes6
Dr. Sim's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4922024: 4822%
- Other services
- 2023: 02024: 354
Dr. Sim compared with the California median for nephrologists, 2024
- Dr. Sim
- California median
- Medicare services
- 836vs 1,08423% below
- Medicare patients
- 273vs 30711% below
- Part D claims
- 846vs 95511% below
Medians across 1,355 nephrologists in California with Dmand AI profiles that report each measure.
Dr. Sim'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. Sim?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Sim and other nephrologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael T. Sim treated 273 Medicare patients in 2024, average age 75
CMS counts 273 Medicare patients who saw Dr. Sim in 2024. The largest group is 75 to 84, with 114 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 32% are also on Medicaid. Their average risk score is 2.23, 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. Sim's median patient age at 73, with 48% women.
Medicare patients, 2024273
Average age75
Average risk score2.23
Also on Medicaid32%
Dr. Sim's Medicare patients by age, 2024
Dr. Sim's Medicare patients by sex, 2024
- Women14152%
- Men13248%
Chronic conditions among Dr. Sim's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Diabetes59%
- Arthritis52%
- Ischemic heart disease40%
- Heart failure34%
- Atrial fibrillation26%
Share of Medicare patients with each condition. A patient can have several.
Dr. Sim's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women48%
- Men52%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Michael T. Sim wrote 1,098 Medicare Part D claims in 2024
In 2024, Dr. Sim wrote 1,098 Medicare Part D claims for 183 patients. 81% of them were for generic drugs. CMS names the drug for 846 of them, across 27 drugs with 11 or more claims each, at $148,849 in total drug cost. In 2023, CMS named 828 claims across 27 drugs.
Part D claims, 20241,098
Drugs named by CMS27
Total drug cost$148,849
Part D patients183
Dr. Sim's Part D claims by kind of drug, 2024
- Generic885 claims81%
- Brand-name and other213 claims19%
Dr. Sim'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 8282024: 8462%
Drugs named by CMS: 27 in 2024, 27 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 T. Sim scored 83 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 83 out of 100 for Dr. Sim for performance year 2024, reported as part of a group. Dr. Sim accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Sim as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Sim's MIPS scores, performance year 2024
- 83of 100Final score
- 64.8of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 69of 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. Michael T. Sim has 1 publication on record
Dmand AI links 1 paper to Dr. Sim.
Papers1
Recent publications by Dr. Sim
See who Dr. Sim researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Sim works with, so you can find a warm path to the right nephrologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Michael T. Sim received $106 in industry payments in 2019
CMS Open Payments shows 1 general payment to Dr. Sim from 1 drug or device company in 2019. Food and beverage make up the largest share, 100% of the total. Otsuka America Pharmaceutical, Inc. paid the most, $106.
Companies that paid Dr. Sim 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 T. Sim has 1 award and honors on record
Dmand AI lists 1 award for Dr. Sim, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Sim
- 2011
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. Michael T. Sim graduated from Tufts University School Of Medicine
Dr. Sim graduated from Tufts University School Of Medicine in 2001.
- Medical school
- Board certified in nephrology
- Board certified in internal medicine
- Board certified in nephrology
Source: Dmand AI Professional Profile Data
Dr. Michael T. Sim accepts plans from 4 insurance carriers
Dr. Sim is in network with 4 carriers, including Aetna, Elevance and CMS Medicare. Medicare plans come from the most carriers, 3. Check the plan with the practice before a visit.
- Aetna
- Elevance
- CMS Medicare
- NV State Medicaid
Plan types Dr. Sim accepts, by number of carriers
- Medicare3
- EPO2
- HMO2
- POS2
- PPO2
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Michael T. Sim'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 |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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 T. Sim
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 T. Sim's NPI number?
Dr. Michael T. Sim's NPI number is 1811972771. It was assigned on December 13, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael T. Sim?
Dr. Michael T. Sim is a nephrologist in Sacramento, California. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Michael T. Sim practice?
Dr. Sim practices at 2315 Stockton Boulevard, Sacramento, CA 95817. Dr. Sim's primary practice is UC Davis Medical Center in Sacramento, California, part of University of California Health. Dmand AI also links Dr. Sim to 2 hospitals.
What is Dr. Michael T. Sim's office phone number?
The practice phone on file for Dr. Sim is (916) 734-2011.
What is Dr. Michael T. Sim's medical license number?
Dr. Sim's California license number on file is A86300.
Which hospitals is Dr. Michael T. Sim affiliated with?
Dr. Sim practices at UC Davis Medical Center in Sacramento, California. Dr. Sim is also affiliated with Kaiser Permanente South Sacramento Medical Center. Dmand AI links Dr. Sim to 2 more hospitals.
What medical group is Dr. Michael T. Sim part of?
Dr. Sim is linked to UC Davis Medical Group.
Does Dr. Michael T. Sim accept Medicare?
Yes. CMS data shows Dr. Sim billed Medicare for 836 services in 2024, and Dr. Sim accepts Medicare assignment.
Does Dr. Michael T. Sim offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Sim as offering telehealth services.
What is Dr. Michael T. Sim's MIPS score?
Dr. Sim's MIPS final score for performance year 2024 is 83 out of 100, reported as part of a group.
Show 9 more questionsShow fewer questions
How many Medicare patients does Dr. Michael T. Sim see?
CMS counts 273 Medicare patients who saw Dr. Sim in 2024, with an average age of 75.
Is Dr. Michael T. Sim board certified?
Yes. Dr. Sim is board certified in nephrology by the American Board of Internal Medicine.
What services does Dr. Michael T. Sim bill to Medicare?
In 2024, Dr. Sim's most billed Medicare services were medicare service (G2211), office visit, established patient (99214) and office visit, established patient (99215).
Where did Dr. Michael T. Sim go to medical school?
Dr. Sim graduated from Tufts University School Of Medicine in 2001.
What drugs does Dr. Michael T. Sim prescribe most?
In 2024 Medicare Part D data, Dr. Sim's most prescribed drugs by claims were Calcitriol, Amlodipine Besylate and Jardiance.
Has Dr. Michael T. Sim received payments from drug or device companies?
CMS Open Payments shows $106 in general payments to Dr. Sim from 1 company from 2019 to 2019. The largest total came from Otsuka America Pharmaceutical, Inc.
How long has Dr. Michael T. Sim been practicing?
Dr. Sim graduated from medical school in 2001, 25 years ago.
Does Dr. Michael T. Sim do research?
Dmand AI links 1 publication to Dr. Sim.
What insurance does Dr. Michael T. Sim accept?
Dr. Sim is in network with 4 carriers, including Aetna, Elevance and CMS Medicare. Medicare plans come from the most carriers, 3. Check the plan with the practice before a visit.
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