Silvana Marisa Giannelli, MD
Endocrinology, Diabetes & Metabolism Physician · Rancho Cucamonga, CA
Silvana Marisa Giannelli, MD is an endocrinology, diabetes & metabolism physician with a practice address in Rancho Cucamonga, California, and NPI 1821295247, issued on Jun 29, 2007. Check the license (California A109512, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Silvana Marisa Giannelli
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- A109512 CA
Self-reported in NPPES; status is on the state search - Practice location
- 10807 Laurel St Ste 200, Rancho Cucamonga, CA 91730
- Phone
- (909) 757-8078
- Enumerated
- Jun 29, 2007
- Record last updated
- May 13, 2025
- Fax
- (909) 244-9652
- Medicare enrollment
- Enrolled (PECOS I20120913000274); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →
Verify Silvana Marisa Giannelli in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A109512Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
40% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
1,573 Medicare Part D claims for 196 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 42% of claims.
Most prescribed
- Levothyroxine Sodium275 claims
- Mounjaro132 claims
- Liothyronine Sodium99 claims
- Synthroid89 claims
- Ozempic82 claims
- Calcitriol70 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 practice group's MIPS final score for 2023 (Medicare payment program): 85.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $33.69
1 payment: food and beverage; the largest payer was Medtronic, Inc. 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
- Faculty Physicians And Surgeons OF LlusmLoma Linda, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Silvana Marisa Giannelli among 1,131 endocrinology, diabetes & metabolism physician records in California
Silvana Marisa Giannelli, MD 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 2007, is newer than 46% of them.
- NPI issued2007 · 46% of these records are older, 42% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2005 · median 2003 among the 779 with a school on file
- Record last updated2025 · 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 Rancho Cucamonga → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Jeffrey Unger, M.D.Rancho Cucamonga, CA 917301003856188
- William Kurban, MDGlendora, CA 917411134385271
- Radha Reddy, MDClaremont, CA 917111780652073
- Hsiang-Shien Chen, M.D.Chino, CA 917101962401489
- Sadiq Mandilawi, MDLa Verne, CA 917501295716736
- Jeffrey Mason, M.D.La Verne, CA 917501255308912
- Erik VillafanaChino, CA 917101043102494
- Nisha Jayani, M.D.Chino Hills, CA 917091124354584
Common questions
What is Silvana Marisa Giannelli, MD's NPI number?
Silvana Marisa Giannelli, MD's National Provider Identifier (NPI) is 1821295247, issued on Jun 29, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Silvana Marisa Giannelli, MD located?
The NPPES record lists a practice address at 10807 Laurel St Ste 200, Rancho Cucamonga, CA, 91730. Phone: (909) 757-8078. Providers update this record themselves, so call before visiting.
How can I verify Silvana Marisa Giannelli, MD's license?
NPPES lists California license number A109512, 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 Silvana Marisa Giannelli, MD prescribe under Medicare Part D?
In 2024, Silvana Marisa Giannelli, MD had 1,573 Medicare Part D claims for 196 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.
What is Silvana Marisa Giannelli, MD's MIPS final score?
The 2023 MIPS final score is 85.2 of 100, reported for the practice group. 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.