Luis Guillermo Osorio
Internal Medicine Physician · Springfield, MA
Luis Guillermo Osorio is an internal medicine physician with a practice address in Springfield, Massachusetts, and NPI 1013544485, issued on Mar 25, 2020. Check the license (Massachusetts 1023854, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Luis Guillermo Osorio
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 1023854 MA
Self-reported in NPPES; status is on the state search - Practice location
- 759 Chestnut St, Springfield, MA 01199
- Phone
- (413) 794-0000
- Enumerated
- Mar 25, 2020
- Record last updated
- Jul 22, 2025
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 759 Chestnut St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Patrick Abad, MDStudent in an Organized Health Care Education/Training Program1063351823
- Ramsha Abbas, MBBSStudent in an Organized Health Care Education/Training Program1619679693
- Mohamed Abdelazeem, MDStudent in an Organized Health Care Education/Training Program1720606551
- Rishard Abdul, M.B.B.SCardiovascular Disease Physician1114412830
- Mohammed AbozenahStudent in an Organized Health Care Education/Training Program1457839805
- Saeed Abughazaleh, MDCardiovascular Disease Physician1427782762
Verify Luis Guillermo Osorio in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 1023854Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average internal medicine physician in 2024
75 Medicare Part D claims for 22 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Losartan Potassium19 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.
Industry payments in 2024: $224.45
2 payments; by number, the most common kind was education; the largest payer was Aurinia Pharma U.S., 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.
Luis Guillermo Osorio among 6,825 internal medicine physician records in Massachusetts
Luis Guillermo Osorio is one of 6,825 internal medicine physician records with a practice address in Massachusetts. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 87% of them.
- NPI issued2020 · 87% of these records are older, 11% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2025 · 64% 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 Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
282 internal medicine physician records list a practice address in Springfield
They are 282 of the 8,553 NPPES records with a practice address in Springfield, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Springfield → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Ronan Ali, M.D.Springfield, MA 011991578761490
- Susan Borden, M.D.Springfield, MA 011991558514083
- Mohamed Elarabi, M.DSpringfield, MA 011991154515880
- Loring Flint, MDSpringfield, MA 011991255426532
- Ejaz KhalidSpringfield, MA 011991205099553
- Christopher Lachance, MDSpringfield, MA 011991922019553
- Donna Mercado, M.D.Springfield, MA 011991346267705
- Mohamed Mohamed, MDSpringfield, MA 011991760623102
Common questions
What is Luis Guillermo Osorio's NPI number?
Luis Guillermo Osorio's National Provider Identifier (NPI) is 1013544485, issued on Mar 25, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Luis Guillermo Osorio located?
The NPPES record lists a practice address at 759 Chestnut St, Springfield, MA, 01199. Phone: (413) 794-0000. Providers update this record themselves, so call before visiting.
How can I verify Luis Guillermo Osorio's license?
NPPES lists Massachusetts license number 1023854, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Luis Guillermo Osorio prescribe under Medicare Part D?
In 2024, Luis Guillermo Osorio had 75 Medicare Part D claims for 22 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.