Dr. Nang Lok Ellick Tsang, MD
- Medicare services, 2024
- 1,371
- Medicare patients, 2024
- 172
- Part D claims, 2024
- 5,863
- Hospital affiliations
- 2
- Industry payments
- $1,746
- Practice address
- 1800 Sullivan Ave, Daly City, CA 94015-2228
- Practice phone
- Call (650) 992-8484
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Tsang Ellick MD
Physician office · Daly City, California
Find Dr. Tsang's professional email, personal email and mobile number
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Dr. Nang Lok Ellick Tsang is an internist in Daly City, California
Dr. Tsang practices at Tsang Ellick MD in Daly City, California.
Dr. Tsang's NPI, 1992873723, was assigned on December 1, 2006. Dr. Tsang holds California license CA A053928.
- NPI
- 1992873723NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5698823540
- NPI enumeration date
- December 1, 2006
- NPI status
- Active
- Offers telehealth
- Yes
- Practice phone
- (650) 992-8484
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 68
- Medical school graduation
- 1984
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Nang Lok Ellick Tsang practices at Tsang Ellick MD in Daly City, California
Dr. Tsang's primary practice is Tsang Ellick MD, at 1800 Sullivan Ave, Daly City, CA 94015-2228. The practice phone is (650) 992-8484.
- Tsang Ellick MD1800 Sullivan Ave, Daly City, CA 94015-2228Phone(650) 992-8484
Source: Dmand AI Affiliation Data
Dr. Nang Lok Ellick Tsang is affiliated with 7 sites of care
Dr. Tsang's primary practice is Tsang Ellick MD in Daly City, California. Dr. Tsang is also affiliated with AHMC Seton Medical Center. Dmand AI also links Dr. Tsang to 1 more hospital, 3 skilled nursing facilities and 1 home health agency, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Nang Lok Ellick Tsang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Tsang practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Tsang Ellick MD | Available with a free account |
| +6 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Nang Lok Ellick Tsang is one of 16,751 internists in California
Internal medicine is Dr. Tsang's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Tsang is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Tsang
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. Nang Lok Ellick Tsang billed Medicare for 1,371 services in 2024
CMS data shows 1,371 Medicare services from Dr. Tsang across 8 procedure codes in 2024, for 172 Medicare patients. Medicare paid $156,389 for them.
Where Dr. Tsang's Medicare services took place, 2024
- In an office25819%
- In a facility1,11381%
Dr. Tsang compared with the California median for internists, 2024
- Dr. Tsang
- California median
- Medicare services
- 1,371vs 3613.8 times
- Medicare patients
- 172vs 15114% above
- Part D claims
- 5,285vs 42112.6 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Tsang'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Nang Lok Ellick Tsang treated 172 Medicare patients in 2024, average age 78
CMS counts 172 Medicare patients who saw Dr. Tsang in 2024. The largest group is 75 to 84, with 64 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 47% are also on Medicaid. Their average risk score is 2.44, 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. Tsang's median patient age at 77, with 53% women.
Dr. Tsang's Medicare patients by age, 2024
Dr. Tsang's Medicare patients by sex, 2024
- Women9253%
- Men8047%
Chronic conditions among Dr. Tsang's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes56%
- Ischemic heart disease53%
- Chronic kidney disease47%
- Arthritis39%
- Heart failure35%
- Atrial fibrillation34%
Share of Medicare patients with each condition. A patient can have several.
Dr. Tsang's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 77
Patient panel by sex, all payers
- Women53%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Nang Lok Ellick Tsang wrote 5,863 Medicare Part D claims in 2024
In 2024, Dr. Tsang wrote 5,863 Medicare Part D claims for 312 patients. 80% of them were for generic drugs. CMS names the drug for 5,285 of them, across 114 drugs with 11 or more claims each, at $398,758 in total drug cost.
Dr. Tsang's Part D claims by kind of drug, 2024
- Generic4,687 claims80%
- Brand-name1,149 claims20%
- Other27 claims0%
Dr. Tsang'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. Tsang's Part D claims, 2024
- Opioids2%116 of 5,863 claims
- Antibiotics5%283 of 5,863 claims
- Antipsychotics, patients 65 and over1%46 of 5,863 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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. Nang Lok Ellick Tsang offers telehealth to Medicare patients
CMS lists Dr. Tsang as offering telehealth.
- Offers telehealth
- Yes
Removal of tissue: 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. Nang Lok Ellick Tsang received $1,746 in industry payments from 2024 to 2025
CMS Open Payments shows 68 general payments to Dr. Tsang from 12 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Novo Nordisk Inc paid the most, $393.
General payments to Dr. Tsang by program year, 2024 to 2025
Companies that paid Dr. Tsang the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Nang Lok Ellick Tsang'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 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) |
| 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. Nang Lok Ellick Tsang
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. Nang Lok Ellick Tsang's NPI number?
Dr. Nang Lok Ellick Tsang's NPI number is 1992873723. It was assigned on December 1, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Nang Lok Ellick Tsang?
Dr. Nang Lok Ellick Tsang is an internist in Daly City, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Nang Lok Ellick Tsang practice?
Dr. Tsang practices at 1800 Sullivan Ave, Daly City, CA 94015-2228. Dr. Tsang's primary practice is Tsang Ellick MD in Daly City, California. Dmand AI also links Dr. Tsang to 1 hospital, 3 skilled nursing facilities and 1 home health agency.
What is Dr. Nang Lok Ellick Tsang's office phone number?
The practice phone on file for Dr. Tsang is (650) 992-8484.
What is Dr. Nang Lok Ellick Tsang's medical license number?
Dr. Tsang holds California license CA A053928.
Which hospitals is Dr. Nang Lok Ellick Tsang affiliated with?
Dr. Tsang is affiliated with AHMC Seton Medical Center. Dmand AI links Dr. Tsang to 1 more hospital.
Does Dr. Nang Lok Ellick Tsang accept Medicare?
Yes. CMS data shows Dr. Tsang billed Medicare for 1,371 services in 2024.
Does Dr. Nang Lok Ellick Tsang offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Tsang as offering telehealth services.
How many Medicare patients does Dr. Nang Lok Ellick Tsang see?
CMS counts 172 Medicare patients who saw Dr. Tsang in 2024, with an average age of 78.
What services does Dr. Nang Lok Ellick Tsang bill to Medicare?
In 2024, Dr. Tsang's most billed Medicare services were hospital inpatient care (99233), nursing facility care (99310) and office visit, established patient (99214).
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What drugs does Dr. Nang Lok Ellick Tsang prescribe most?
In 2024 Medicare Part D data, Dr. Tsang's most prescribed drugs by claims were Amlodipine Besylate, Atorvastatin Calcium and Pantoprazole Sodium.
Has Dr. Nang Lok Ellick Tsang received payments from drug or device companies?
CMS Open Payments shows $1,746 in general payments to Dr. Tsang from 12 companies from 2024 to 2025. The largest total came from Novo Nordisk Inc.
How long has Dr. Nang Lok Ellick Tsang been practicing?
Dr. Tsang graduated from medical school in 1984, 42 years ago.
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