Steven Loy-Ngan Eng, M.D.
Endocrinology, Diabetes & Metabolism Physician · Long Beach, CA
Steven Loy-Ngan Eng, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Long Beach, California, and NPI 1881798189, issued on Sep 8, 2006. Check the license (California A74358, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Steven Loy-Ngan Eng
- Credential
- M.D.
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- A74358 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3300 E. South Street, Long Beach, CA 90805
- Phone
- (562) 634-9803
- Enumerated
- Sep 8, 2006
- Record last updated
- Aug 12, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (562) 634-9845
- Medicare enrollment
- Enrolled (PECOS I20041005000349); accepts Medicare assignment
- Medical or professional school
- Rutgers New Jersey Medical School, 1999
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →
Verify Steven Loy-Ngan Eng in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A74358Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.2 times the Medicare Part D claims of the average endocrinology, diabetes & metabolism physician in 2024
8,395 Medicare Part D claims for 1,027 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 44% of claims.
Most prescribed
- Levothyroxine Sodium1,186 claims
- Metformin Hcl493 claims
- Synthroid310 claims
- Jardiance299 claims
- Lantus Solostar298 claims
- Atorvastatin Calcium277 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.
The MIPS final score for 2023 (Medicare payment program): 26 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,390.29
66 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 5,661 providers of this specialty with any payment received $5,742.15 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Steven L Eng MD IncLakewood, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Steven Loy-Ngan Eng among 1,131 endocrinology, diabetes & metabolism physician records in California
Steven Loy-Ngan Eng, M.D. is one of 1,131 endocrinology, diabetes & metabolism physician records with a practice address in California. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 54% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1999 · median 2003 among the 779 with a school on file
- Record last updated2009 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in California
There are 1,131 endocrinology, diabetes & metabolism physician records in California.
All 1,131 in California → Every provider in Long Beach → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Alex Kutas, MDLong Beach, CA 908051679677967
- Mohsen Tabrizi, MDLong Beach, CA 908051093973760
- Richard Berkson, MDLong Beach, CA 908061699793885
- Renuka Boyapalli, MDLong Beach, CA 908061558399311
- Lauren Choi, M.D.Long Beach, CA 908061699736132
- Matthew Clarke, MDLong Beach, CA 908061528315835
- Peter Linfoot, PH.D., M.D.Long Beach, CA 908061396777264
- Ricky Mac, MDLong Beach, CA 908061578581666
Common questions
What is Steven Loy-Ngan Eng, M.D.'s NPI number?
Steven Loy-Ngan Eng, M.D.'s National Provider Identifier (NPI) is 1881798189, issued on Sep 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Steven Loy-Ngan Eng, M.D. located?
The NPPES record lists a practice address at 3300 E. South Street, Long Beach, CA, 90805. Phone: (562) 634-9803. Providers update this record themselves, so call before visiting.
How can I verify Steven Loy-Ngan Eng, M.D.'s license?
NPPES lists California license number A74358, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Steven Loy-Ngan Eng, M.D. prescribe under Medicare Part D?
In 2024, Steven Loy-Ngan Eng, M.D. had 8,395 Medicare Part D claims for 1,027 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.
What is Steven Loy-Ngan Eng, M.D.'s MIPS final score?
The 2023 MIPS final score is 26 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.