Karl K. Ng, MD
Family Medicine Physician · Mahopac, NY
Karl K. Ng, MD is a family medicine physician with a practice address in Mahopac, New York, and NPI 1619553203, issued on Mar 23, 2021. Check the license (New York 331470, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Karl K. Ng
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 331470 NY
Self-reported in NPPES; status is on the state search - Practice location
- 979 Route 6, Mahopac, NY 10541
- Phone
- (834) 230-2382
- Enumerated
- Mar 23, 2021
- Record last updated
- Jul 19, 2024
- Medicare enrollment
- Enrolled (PECOS I20240829002113); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 6,417 in New York → Look up another NPI →
Also registered at 979 Route 6
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Spencer Schell, MDFamily Medicine Physician1699351486
- Gisell Vega, MDFamily Medicine Physician1336689892
Verify Karl K. Ng in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 331470Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average family medicine physician in 2024
140 Medicare Part D claims for 61 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Azithromycin12 claims
- Atorvastatin Calcium11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Nuvance Health Medical Practice PCMahopac, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karl K. Ng among 6,417 family medicine physician records in New York
Karl K. Ng, MD is one of 6,417 family medicine physician records with a practice address in New York. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 90% of them.
- NPI issued2021 · 90% of these records are older, 7% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2020 · median 2007 among the 4,188 with a school on file
- Record last updated2024 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
3 family medicine physician records list a practice address in Mahopac
They are 3 of the 393 NPPES records with a practice address in Mahopac, and 6,417 family medicine physician records in New York.
All 6,417 in New York → Every provider in Mahopac → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Spencer Schell, MDMahopac, NY 105411699351486
- Gisell Vega, MDMahopac, NY 105411336689892
- Lili Kung, MDMamaroneck, NY 105431104888221
- Kevin Maloney, MDMamaroneck, NY 105431023070646
- Amber Brody, D.O.Larchmont, NY 105381093024887
- Shauna Gallagher, MDLarchmont, NY 105381538509039
- Jennifer Heinegg, M.D.Larchmont, NY 105381336454602
- Philip Heinegg, M.D.Larchmont, NY 105381588678593
Common questions
What is Karl K. Ng, MD's NPI number?
Karl K. Ng, MD's National Provider Identifier (NPI) is 1619553203, issued on Mar 23, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Karl K. Ng, MD located?
The NPPES record lists a practice address at 979 Route 6, Mahopac, NY, 10541. Phone: (834) 230-2382. Providers update this record themselves, so call before visiting.
How can I verify Karl K. Ng, MD's license?
NPPES lists New York license number 331470, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Karl K. Ng, MD prescribe under Medicare Part D?
In 2024, Karl K. Ng, MD had 140 Medicare Part D claims for 61 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.