Grace Si-Wah Eng, MD
Endocrinology, Diabetes & Metabolism Physician · Emeryville, CA
Grace Si-Wah Eng, MD is an endocrinology, diabetes & metabolism physician with a practice address in Emeryville, California, and NPI 1871552679, issued on Mar 21, 2006. Check the license (California A86467, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Grace Si-Wah Eng
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- A86467 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5800 Hollis St, Emeryville, CA 94608
- Phone
- (510) 806-2100
- Enumerated
- Mar 21, 2006
- Record last updated
- Apr 29, 2024
- Fax
- (510) 806-2557
- Medicare enrollment
- Enrolled (PECOS I20040722001345); accepts Medicare assignment
- Medical or professional school
- University Of Michigan Medical School, 1999
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 5800 Hollis St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Emily Birnbaum, FNPNurse Practitioner1194355446
- Tara Farah, MDFamily Medicine Physician1851829642
- Julia Fellows, PA-CPhysician Assistant1568970838
- Victoria He, PHARM.D.Pharmacist1508207671
- Cory Hillis, AUDAudiologist1275151979
- Sarah Holmgren, NPNurse Practitioner1417320896
Verify Grace Si-Wah Eng in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A86467Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
8% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
2,417 Medicare Part D claims for 323 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 41% of claims.
Most prescribed
- Levothyroxine Sodium353 claims
- Alendronate Sodium190 claims
- Metformin Hcl Er130 claims
- Ozempic109 claims
- Atorvastatin Calcium103 claims
- Teriparatide82 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
- University Healthcare AlliancePleasanton, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in California
There are 1,131 endocrinology, diabetes & metabolism physician records in California.
Other endocrinology, diabetes & metabolism physician records in California
- Evan Abel, MDSanta Monica, CA1619067238
- Anita Abraham, M.D.Stockton, CA1558380337
- Sallie Adams, M.D.Roseville, CA1255342085
- Helen Adelberg, M.D.Encino, CA1093935447
- Yewande Adepoju, DOOroville, CA1467892984
- David Aftergood, MDBeverly Hills, CA1639259328
- Nidhi Agarwal, MDTorrance, CA1518387125
- Bahar Aghighi, MDSanta Cruz, CA1770562134
- Tyler Aguinaldo, MDBurlingame, CA1306811906
- Susan Ahern, D.O.Ventura, CA1508156597
Common questions
What is Grace Si-Wah Eng, MD's NPI number?
Grace Si-Wah Eng, MD's National Provider Identifier (NPI) is 1871552679, issued on Mar 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Grace Si-Wah Eng, MD located?
The NPPES record lists a practice address at 5800 Hollis St, Emeryville, CA, 94608. Phone: (510) 806-2100. Providers update this record themselves, so call before visiting.
How can I verify Grace Si-Wah Eng, MD's license?
NPPES lists California license number A86467, 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 Grace Si-Wah Eng, MD prescribe under Medicare Part D?
In 2024, Grace Si-Wah Eng, MD had 2,417 Medicare Part D claims for 323 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.