Dr. Diane Hweelan Mak, MD
- Medicare services, 2021
- 463
- Part D claims, 2023
- 352
- Industry payments
- $62
- Affiliated sites
- 2
- Medical group
- 1
- Practice address
- 6900 Pecos Rd, North Las Vegas, NV 89086
- Practice phone
- Call (702) 341-3020
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
North Las Vegas VA Medical Center
VA Clinic / Health Facility · North Las Vegas, Nevada
Find Dr. Mak's professional email, personal email and mobile number
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Dr. Diane Hweelan Mak is an internist in North Las Vegas, Nevada
Dr. Mak practices at North Las Vegas VA Medical Center in North Las Vegas, Nevada.
Dr. Mak's NPI, 1053632844, was assigned on June 16, 2010. Dr. Mak graduated from Drexel University College of Medicine in 2010. Dr. Mak holds Nevada license 21085.
- NPI
- 1053632844NPI Registry (opens in a new tab)
- NPI enumeration date
- June 16, 2010
- NPI status
- Active
- Practice phone
- (702) 341-3020
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 42
- Medical school graduation
- 2010
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Diane Hweelan Mak practices at North Las Vegas VA Medical Center in North Las Vegas, Nevada
Dr. Mak's primary practice is North Las Vegas VA Medical Center, at 6900 Pecos Rd, North Las Vegas, NV 89086. The practice phone is (702) 341-3020.
- North Las Vegas VA Medical Center6900 Pecos Rd, North Las Vegas, NV 89086Phone(702) 341-3020
Source: Dmand AI Affiliation Data
Dr. Diane Hweelan Mak is affiliated with 2 sites of care and 1 medical group
Dr. Mak's primary practice is North Las Vegas VA Medical Center in North Las Vegas, Nevada. The medical group on file is Intermountain Health. Dmand AI also links Dr. Mak to 1 more group practice or clinic, named with a free account. Dr. Mak's employer is on file too: a government & correctional health.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Diane Hweelan Mak's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mak practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| North Las Vegas VA Medical Center | 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. Diane Hweelan Mak is one of 1,019 internists in Nevada
Internal medicine is Dr. Mak's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Mak is licensed in Nevada.
Specialties and state licenses
- Internal medicine, NevadaPrimary
Internists near Dr. Mak
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. Diane Hweelan Mak billed Medicare for 463 services in 2021
CMS data shows 463 Medicare services from Dr. Mak across 6 procedure codes in 2021. Medicare paid $27,805 for them. Every service was in an office.
Dr. Mak's Medicare services by type, 2020 to 2021
- 2020
- 2021
- Other services
- 2020: 2132021: 27831%
- Office and hospital visits
- 2020: 3452021: 18546%
- Tests and treatments
- 2020: 1112021: 0100%
Dr. Mak compared with the Nevada median for internists, 2021
- Dr. Mak
- Nevada median
- Medicare services
- 463vs 52011% below
- Part D claims
- 352vs 364Close to median
Medians across 935 internists in Nevada with Dmand AI profiles that report each measure.
Dr. Mak's most billed Medicare procedure codes, 2021
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. Mak?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Mak and other internists in Nevada.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Diane Hweelan Mak's patients have a median age of 72
Across all payers, Dmand AI patient panel data puts Dr. Mak's median patient age at 72, with 64% women.
Dr. Mak's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women64%
- Men34%
Source: Dmand AI Patient Panel Data
Dr. Diane Hweelan Mak wrote 352 Medicare Part D claims in 2023
In 2023, Dr. Mak wrote 352 Medicare Part D claims. They cover 15 drugs, with $4,104 in total drug cost. In 2022, CMS named 2,151 claims across 62 drugs.
Dr. Mak's most prescribed drugs by claims, 2023
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, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 2,1512023: 35284%
Drugs named by CMS: 15 in 2023, 62 in 2022.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Diane Hweelan Mak received $62 in industry payments from 2016 to 2022
CMS Open Payments shows 2 general payments to Dr. Mak from 2 drug and device companies from 2016 to 2022. Food and beverage make up the largest share, 100% of the total. Medtronic Vascular, Inc. paid the most, $39.
General payments to Dr. Mak by program year, 2016 to 2022
Companies that paid Dr. Mak the most, 2016 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Diane Hweelan Mak graduated from Drexel University College of Medicine
Dr. Mak graduated from Drexel University College of Medicine in 2010.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Diane Hweelan Mak'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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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. Diane Hweelan Mak
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 Hweelan Mak's NPI number?
Dr. Diane Hweelan Mak's NPI number is 1053632844. It was assigned on June 16, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. Diane Hweelan Mak?
Dr. Diane Hweelan Mak is an internist in North Las Vegas, Nevada. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Diane Hweelan Mak practice?
Dr. Mak practices at 6900 Pecos Rd, North Las Vegas, NV 89086. Dr. Mak's primary practice is North Las Vegas VA Medical Center in North Las Vegas, Nevada. Dmand AI also links Dr. Mak to 1 group practice or clinic.
What is Dr. Diane Hweelan Mak's office phone number?
The practice phone on file for Dr. Mak is (702) 341-3020.
What is Dr. Diane Hweelan Mak's medical license number?
Dr. Mak holds Nevada license 21085.
What medical group is Dr. Diane Hweelan Mak part of?
Dr. Mak is linked to Intermountain Health.
Does Dr. Diane Hweelan Mak accept Medicare?
Yes. CMS data shows Dr. Mak billed Medicare for 463 services in 2021.
What services does Dr. Diane Hweelan Mak bill to Medicare?
In 2021, Dr. Mak's most billed Medicare services were office visit, established patient (99214), medical service (0001A) and medical service (0002A).
Where did Dr. Diane Hweelan Mak go to medical school?
Dr. Mak graduated from Drexel University College of Medicine in 2010.
What drugs does Dr. Diane Hweelan Mak prescribe most?
In 2023 Medicare Part D data, Dr. Mak's most prescribed drugs by claims were Atorvastatin Calcium, Losartan Potassium and Levothyroxine Sodium.
Has Dr. Diane Hweelan Mak received payments from drug or device companies?
CMS Open Payments shows $62 in general payments to Dr. Mak from 2 companies from 2016 to 2022. The largest total came from Medtronic Vascular, Inc.
How long has Dr. Diane Hweelan Mak been practicing?
Dr. Mak graduated from medical school in 2010, 16 years ago.
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