Antonio Santiago-Agostini, MD
Internal Medicine Physician · Owosso, MI
Antonio Santiago-Agostini, MD is an internal medicine physician with a practice address in Owosso, Michigan, and NPI 1801834445, issued on Jun 4, 2006. Check the license (Michigan 4301054955, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Antonio Santiago-Agostini
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 4301054955 MI
Self-reported in NPPES; status is on the state search - Practice location
- 300 Health Park Dr Ste 302, Owosso, MI 48867
- Phone
- (989) 723-5540
- Enumerated
- Jun 4, 2006
- Record last updated
- Jun 17, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (989) 720-2292
- Medicaid ID
- 1801834445 MI
- Medicare enrollment
- Enrolled (PECOS I20060426000064); accepts Medicare assignment
- Medical or professional school
- Ponce School Of Medicine, 1985
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 5,735 in Michigan → Look up another NPI →
Verify Antonio Santiago-Agostini in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301054955Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.9 times the Medicare Part D claims of the average internal medicine physician in 2024
9,053 Medicare Part D claims for 617 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 233 claims were for opioids.
Most prescribed
- Atorvastatin Calcium600 claims
- Amlodipine Besylate565 claims
- Rosuvastatin Calcium534 claims
- Levothyroxine Sodium389 claims
- Lisinopril268 claims
- Omeprazole253 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): 56.4 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: $16.43
1 payment: food and beverage; the largest payer was Novo Nordisk Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Memorial HospitalOwosso, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Antonio Santiago-Agostini among 5,735 internal medicine physician records in Michigan
Antonio Santiago-Agostini, MD is one of 5,735 internal medicine physician records with a practice address in Michigan. 79% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 60% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1985 · median 2006 among the 3,564 with a school on file
- Record last updated2020 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
15 internal medicine physician records list a practice address in Owosso
They are 15 of the 1,044 NPPES records with a practice address in Owosso, and 5,735 internal medicine physician records in Michigan.
All 5,735 in Michigan → Every provider in Owosso → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Viorica Alawa, D.O.Owosso, MI 488671679794697
- Azmy Allam, MDOwosso, MI 488671285603027
- Madline Chembola, M.DOwosso, MI 488671528416492
- Martin Egenti, MDOwosso, MI 488671871741694
- James Faysal, DOOwosso, MI 488671760746481
- Robert Han, MDOwosso, MI 488671669714242
- Lynn Larson, D.O.Owosso, MI 488671104021765
- Oscar Macal, M.D.Owosso, MI 488671740221936
Common questions
What is Antonio Santiago-Agostini, MD's NPI number?
Antonio Santiago-Agostini, MD's National Provider Identifier (NPI) is 1801834445, issued on Jun 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Antonio Santiago-Agostini, MD located?
The NPPES record lists a practice address at 300 Health Park Dr Ste 302, Owosso, MI, 48867. Phone: (989) 723-5540. Providers update this record themselves, so call before visiting.
How can I verify Antonio Santiago-Agostini, MD's license?
NPPES lists Michigan license number 4301054955, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Antonio Santiago-Agostini, MD prescribe under Medicare Part D?
In 2024, Antonio Santiago-Agostini, MD had 9,053 Medicare Part D claims for 617 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Antonio Santiago-Agostini, MD's MIPS final score?
The 2023 MIPS final score is 56.4 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.