Dr. William Peter Sim, MD
- Medicare patients, 2024
- 12
- Part D claims, 2024
- 5,679
- Industry payments
- $503
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 441 N Lakeview Ave, Anaheim, CA 92807
- Practice phone
- Call (562) 461-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Southern California Permanente Medical Group
Anaheim, California
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. William Peter Sim is an internist in Anaheim, California
Dr. Sim practices at Southern California Permanente Medical Group in Anaheim, California.
Dr. Sim's NPI, 1902166531, was assigned on May 16, 2012. Dr. Sim graduated from Un of California, Irvine, College of Medicine in 2012. Dr. Sim holds California license A130389.
- NPI
- 1902166531NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5799085403
- NPI enumeration date
- May 16, 2012
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (562) 461-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 40
- Medical school graduation
- 2012
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Peter Sim practices at Southern California Permanente Medical Group in Anaheim, California
Dr. Sim's primary practice is Southern California Permanente Medical Group, at 441 N Lakeview Ave, Anaheim, CA 92807 in Orange County. The practice phone is (562) 461-3000.
- Southern California Permanente Medical Group441 N Lakeview Ave, Anaheim, CA 92807 · Orange CountyPhone(562) 461-3000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. William Peter Sim is affiliated with 2 sites of care and 1 medical group
Dr. Sim's primary practice is Southern California Permanente Medical Group in Anaheim, California. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Sim to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. William Peter Sim's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Sim practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Southern California Permanente Medical Group | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William Peter Sim is one of 16,751 internists in California
Internal medicine is Dr. Sim's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Sim is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Sim
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. William Peter Sim treated 12 Medicare patients in 2024, average age 66
CMS counts 12 Medicare patients who saw Dr. Sim in 2024. The largest group is 85 and over, with 0 patients. Their average risk score is 1.16, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Sim's median patient age at 52, with 52% women.
Dr. Sim's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
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 52
Patient panel by sex, all payers
- Women52%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William Peter Sim wrote 5,679 Medicare Part D claims in 2024
In 2024, Dr. Sim wrote 5,679 Medicare Part D claims for 682 patients. 88% of them were for generic drugs. CMS names the drug for 5,141 of them, across 94 drugs with 11 or more claims each, at $230,591 in total drug cost. In 2023, CMS named 5,051 claims across 89 drugs.
Dr. Sim's Part D claims by kind of drug, 2024
- Generic5,022 claims88%
- Brand-name578 claims10%
- Other79 claims1%
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.
Drug classes CMS tracks in Dr. Sim's Part D claims, 2024
- Opioids3%145 of 5,679 claims
- Antibiotics2%119 of 5,679 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: 5,0512024: 5,1412%
Drugs named by CMS: 94 in 2024, 89 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. William Peter Sim offers telehealth to Medicare patients
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
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. William Peter Sim received $503 in industry payments from 2016 to 2025
CMS Open Payments shows 25 general payments to Dr. Sim from 8 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Allergan Inc. paid the most, $115.
General payments to Dr. Sim by program year, 2016 to 2025
Companies that paid Dr. Sim the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William Peter Sim graduated from Un of California, Irvine, College of Medicine
Dr. Sim graduated from Un of California, Irvine, College of Medicine in 2012.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William Peter 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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| 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) |
| 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. William Peter 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. William Peter Sim's NPI number?
Dr. William Peter Sim's NPI number is 1902166531. It was assigned on May 16, 2012, and it is active in the NPI Registry.
What kind of doctor is Dr. William Peter Sim?
Dr. William Peter Sim is an internist in Anaheim, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. William Peter Sim practice?
Dr. Sim practices at 441 N Lakeview Ave, Anaheim, CA 92807. Dr. Sim's primary practice is Southern California Permanente Medical Group in Anaheim, California. Dmand AI also links Dr. Sim to 1 group practice or clinic.
What is Dr. William Peter Sim's office phone number?
The practice phone on file for Dr. Sim is (562) 461-3000.
What is Dr. William Peter Sim's medical license number?
Dr. Sim holds California license A130389.
What medical group is Dr. William Peter Sim part of?
Dr. Sim is linked to Southern California Permanente Medical Group.
Does Dr. William Peter Sim accept Medicare?
Yes. CMS lists Dr. Sim as accepting Medicare assignment.
Does Dr. William Peter Sim offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Sim as offering telehealth services.
How many Medicare patients does Dr. William Peter Sim see?
CMS counts 12 Medicare patients who saw Dr. Sim in 2024, with an average age of 66.
Where did Dr. William Peter Sim go to medical school?
Dr. Sim graduated from Un of California, Irvine, College of Medicine in 2012.
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What drugs does Dr. William Peter Sim prescribe most?
In 2024 Medicare Part D data, Dr. Sim's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Losartan Potassium.
Has Dr. William Peter Sim received payments from drug or device companies?
CMS Open Payments shows $503 in general payments to Dr. Sim from 8 companies from 2016 to 2025. The largest total came from Allergan Inc.
How long has Dr. William Peter Sim been practicing?
Dr. Sim graduated from medical school in 2012, 14 years ago.
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