Osama Nasim Ahsan, DO
Hospitalist Physician · Rapid City, SD
Osama Nasim Ahsan, DO is a hospitalist physician with a practice address in Rapid City, South Dakota, and NPI 1043903891, issued on May 30, 2023. Check the license (South Dakota 18675, as entered in NPPES) on the South Dakota Board of Medical and Osteopathic Examiners; the Medicare figures below come from public CMS files.
- Name
- Osama Nasim Ahsan
- Credential
- DO
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- 18675 SD
Self-reported in NPPES; status is on the state search - Practice location
- 353 Fairmont Blvd, Rapid City, SD 57701
- Phone
- (605) 755-1000
- Enumerated
- May 30, 2023
- Record last updated
- Jul 15, 2026
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 99 in South Dakota → Look up another NPI →
Also registered at 353 Fairmont Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Osama Nasim Ahsan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Dakota Board of Medical and Osteopathic Examiners
Search for license 18675Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% fewer Medicare Part D claims than the average hospitalist physician in 2024
163 Medicare Part D claims for 69 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D.
Most prescribed
- Amoxicillin-Clavulanate Potass11 claims
- Cefpodoxime Proxetil11 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.
Osama Nasim Ahsan among 99 hospitalist physician records in South Dakota
Osama Nasim Ahsan, DO is one of 99 hospitalist physician records with a practice address in South Dakota. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 97% of them.
- NPI issued2023 · 97% of these records are older, 0% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileNo · 76% of these records are
- Record last updated2026 · 43% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a South Dakota practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in South Dakota
There are 99 hospitalist physician records in South Dakota.
All 99 in South Dakota → Every provider in Rapid City → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Stephen Calhoon, MDRapid City, SD 577011720188220
- Mona Elsayed, MDRapid City, SD 577011205928785
- Candace Fetzer, MDRapid City, SD 577011831146596
- Chad Hanna, MDRapid City, SD 577011568488021
- Robert Houser, MDRapid City, SD 577011578518726
- John Looby, MDRapid City, SD 577011508966011
- Raymond Nowaczyk, MDRapid City, SD 577011104821248
- Marina Petukoff, MDRapid City, SD 577011508802596
Common questions
What is Osama Nasim Ahsan, DO's NPI number?
Osama Nasim Ahsan, DO's National Provider Identifier (NPI) is 1043903891, issued on May 30, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Osama Nasim Ahsan, DO located?
The NPPES record lists a practice address at 353 Fairmont Blvd, Rapid City, SD, 57701. Phone: (605) 755-1000. Providers update this record themselves, so call before visiting.
How can I verify Osama Nasim Ahsan, DO's license?
NPPES lists South Dakota license number 18675, as entered by the provider. Search the South Dakota Board of Medical and Osteopathic Examiners at https://www.sdbmoe.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Osama Nasim Ahsan, DO prescribe under Medicare Part D?
In 2024, Osama Nasim Ahsan, DO had 163 Medicare Part D claims for 69 beneficiaries; the average among hospitalist physician prescribers was 521. 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.