Dr. Siyang Leng, MD
- Medicare services, 2019
- 136
- Part D claims, 2019
- 222
- Hospital affiliations
- 1
- Industry payments
- $723
- State license
- 1
- Practice address
- 79 Middleville Road, Northport, NY 11768
- Practice phone
- Call (516) 261-4400
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Leng'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. Siyang Leng is a hematology (internal medicine) physician in Northport, New York
Dr. Leng practices at Northport VA Medical Center in Northport, New York, part of Veterans Health Administration.
Dr. Leng's NPI, 1619105111, was assigned on June 23, 2009. Dr. Leng holds New York license 269268.
- NPI
- 1619105111NPI Registry (opens in a new tab)
- NPI enumeration date
- June 23, 2009
- NPI status
- Active
- Practice phone
- (516) 261-4400
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Siyang Leng practices at Northport VA Medical Center in Northport, New York
Dr. Leng's primary practice is Northport VA Medical Center, at 79 Middleville Road, Northport, NY 11768 in Suffolk County. The practice phone is (516) 261-4400.
- Northport VA Medical Center79 Middleville Road, Northport, NY 11768 · Suffolk CountyPhone(516) 261-4400
Source: Dmand AI Affiliation Data
Dr. Siyang Leng is affiliated with 1 site of care
Dr. Leng's primary practice is Northport VA Medical Center in Northport, New York, part of Veterans Health Administration. Dr. Leng'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. Siyang Leng's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Leng practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northport VA Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Siyang Leng is one of 139 hematology (internal medicine) physicians in New York
Internal medicine is Dr. Leng's primary specialty in the NPI Registry, under taxonomy code 207RH0000X. The record also lists hematology. Dr. Leng is licensed in New York.
Specialties and state licenses
- Hematology (internal medicine), New YorkPrimary
Hematology (internal medicine) physicians near Dr. Leng
Counts of hematology (internal medicine) physicians 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. Siyang Leng billed Medicare for 136 services in 2019
CMS data shows 136 Medicare services from Dr. Leng across 3 procedure codes in 2019, all of them office visits. Medicare paid $14,651 for them. Every service was in an office.
Dr. Leng's Medicare services by type, 2018 to 2019
- 2018
- 2019
- Office and hospital visits
- 2018: 3442019: 13660%
Dr. Leng compared with the New York median for hematology (internal medicine) physicians, 2019
- Dr. Leng
- New York median
- Medicare services
- 136vs 29854% below
- Part D claims
- 222vs 13071% above
Medians across 121 hematology (internal medicine) physicians in New York with Dmand AI profiles that report each measure.
Dr. Leng's most billed Medicare procedure codes, 2019
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. Leng and other hematology (internal medicine) physicians in New York.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Siyang Leng's patients have a median age of 80
Across all payers, Dmand AI patient panel data puts Dr. Leng's median patient age at 80, with 0% women.
Dr. Leng's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 80
Patient panel by sex, all payers
- Women0%
- Men100%
Source: Dmand AI Patient Panel Data
Dr. Siyang Leng wrote 222 Medicare Part D claims in 2019
In 2019, Dr. Leng wrote 222 Medicare Part D claims. They cover 9 drugs, with $1,618,343 in total drug cost. In 2018, CMS named 226 claims across 8 drugs.
Dr. Leng's most prescribed drugs by claims, 2019
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, 2018 to 2019
- 2018
- 2019
- Claims for drugs CMS names
- 2018: 2262019: 2222%
Drugs named by CMS: 9 in 2019, 8 in 2018.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Siyang Leng received $723 in industry payments from 2016 to 2019
CMS Open Payments shows 8 general payments to Dr. Leng from 6 drug and device companies from 2016 to 2019. Food and beverage make up the largest share, 89% of the total. Merck Sharp & Dohme Corporation paid the most, $245.
General payments to Dr. Leng by program year, 2016 to 2019
General payments to Dr. Leng by kind, 2016 to 2019
- Food and beverage$64389%
- Education$8011%
Companies that paid Dr. Leng the most, 2016 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Siyang Leng'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) |
| 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. Siyang Leng
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. Siyang Leng's NPI number?
Dr. Siyang Leng's NPI number is 1619105111. It was assigned on June 23, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Siyang Leng?
Dr. Siyang Leng is a hematology (internal medicine) physician in Northport, New York. The primary specialty in the NPI Registry is Hematology (Internal Medicine) Physician (taxonomy code 207RH0000X).
Where does Dr. Siyang Leng practice?
Dr. Leng practices at 79 Middleville Road, Northport, NY 11768. Dr. Leng's primary practice is Northport VA Medical Center in Northport, New York, part of Veterans Health Administration.
What is Dr. Siyang Leng's office phone number?
The practice phone on file for Dr. Leng is (516) 261-4400.
What is Dr. Siyang Leng's medical license number?
Dr. Leng holds New York license 269268.
Which hospitals is Dr. Siyang Leng affiliated with?
Dr. Leng practices at Northport VA Medical Center in Northport, New York.
Does Dr. Siyang Leng accept Medicare?
Yes. CMS data shows Dr. Leng billed Medicare for 136 services in 2019.
What services does Dr. Siyang Leng bill to Medicare?
In 2019, Dr. Leng's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99215) and office visit, new patient (99205).
What drugs does Dr. Siyang Leng prescribe most?
In 2019 Medicare Part D data, Dr. Leng's most prescribed drugs by claims were Revlimid, Dexamethasone and Acyclovir.
Has Dr. Siyang Leng received payments from drug or device companies?
CMS Open Payments shows $723 in general payments to Dr. Leng from 6 companies from 2016 to 2019. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. Siyang Leng been practicing?
Dr. Leng's NPI was assigned in 2009.
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